CN107382205B - A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof - Google Patents

A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof Download PDF

Info

Publication number
CN107382205B
CN107382205B CN201710702351.0A CN201710702351A CN107382205B CN 107382205 B CN107382205 B CN 107382205B CN 201710702351 A CN201710702351 A CN 201710702351A CN 107382205 B CN107382205 B CN 107382205B
Authority
CN
China
Prior art keywords
parts
water
strength
concrete
high performance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710702351.0A
Other languages
Chinese (zh)
Other versions
CN107382205A (en
Inventor
郑山锁
董方园
郑捷
郑淏
曹琛
裴培
董立国
宋明辰
阮升
秦卿
周炎
明铭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian University of Architecture and Technology
Original Assignee
Xian University of Architecture and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian University of Architecture and Technology filed Critical Xian University of Architecture and Technology
Priority to CN201710702351.0A priority Critical patent/CN107382205B/en
Publication of CN107382205A publication Critical patent/CN107382205A/en
Application granted granted Critical
Publication of CN107382205B publication Critical patent/CN107382205B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/022—Carbon
    • C04B14/026—Carbon of particular shape, e.g. nanotubes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/346—Materials exhibiting reduced plastic shrinkage cracking
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/76—Use at unusual temperatures, e.g. sub-zero
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses super high strength high performance fiber concretes of a kind of C160 strength grade and preparation method thereof, the mass parts composition of the concrete is as follows: 485 parts of cement, 82 parts of water, 1000 parts of rubble, 750 parts of fine aggregate, 70 parts of flyash, 73 parts of rice hull ash, 102 parts of silicon ash, 14.0 parts of water-reducing agent, 9.5 parts of exciting agent, 1.6 parts of cellulose fibre, 40 parts of hydroxyl modification carbon nano tube dispersion liquid, 37 parts of graphene oxide dispersion, 2.6 parts of defoaming agent.The concrete of preparation toughness with higher and excellent endurance quality, the adhesion strength with higher between fashioned iron, compression strength reaches 167.74MPa, flexural strength reaches 35.21MPa, split tensile strength reaches 14.59MPa, adhesion strength between fashioned iron reaches 7.54MPa, and chloride-penetration resistance grade is VI grade.For can effectively play the cooperative work performance between fashioned iron and concrete in reinforced concrete composite structure, the deficiency that bond between steel and concrete performance is poor, is unable to give full play the respective mechanical property of the two is made up.

Description

A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof
Technical field
It is that one kind mixes rice hull ash, cellulose fibre, modified carbon nano-tube and oxygen the invention belongs to New Building Materials field High intensity, high tenacity and the high durability concrete of graphite alkene, and in particular to a kind of C160 strength grade with high tenacity Super high strength high performance fiber concrete and preparation method thereof.
Background technique
The tensile strength of normal concrete and cement-based material is low, poor toughness, in hardening process or under external loads effect A large amount of microcracks can be generated, Cl is made-、SO4 2-Equal harmful ions and CO2Equal pernicious gases invade inside concrete, accelerate concrete The erosion of structure seriously affects the durability of concrete or cement-base composite material structure, reduces structure service life.
Carbon nanotube is a kind of one dimension fibre material with Nano grade diameter and micron level length, and draw ratio is high Up to 100-1000, elasticity modulus (can reach 1TPa or so) is about 5 times of steel and density is the 1/6 of steel；Carbon is received The tensile strength of mitron then can reach 60-150GPa, and compressive strength 100-170GPa, breaking strain is in 30%-50% range. Because of its excellent Physical and mechanical properties, carbon nanotube is made to become ideal composite material reinforcing fiber.But due to carbon nanometer Pipe surface it is complete it is smooth, defect is few, lacks active group, the relative solubility in water and various solution or composite material compared with Low, there are there is very big surface free energy, therefore carbon nanotube at biggish Van der Waals force, surface between carbon nanotube in addition Between spontaneous reunion or winding easily occurs, it is evenly dispersed in certain polymer to seriously affect carbon nanotube.The present invention Multi-walled carbon nanotube is dispersed and is ultrasonically treated using surfactant, carbon nanotube is not being cut off and is not destroying its surface On the basis of structure, the modified multiwalled carbon nanotube dispersion liquid for capableing of stable dispersion in water is obtained, to can be used for In concrete, its microfibre toughening effect is given full play to.
And graphene is also intensity and the highest crystal structure of hardness in current material, tensile strength and elasticity modulus difference It can reach 125GPa and 1.1TPa.Single-layer graphene thickness is only about 0.35nm, is most thin by two in presently found nature Material is tieed up, specific surface area with higher can be well in conjunction with polymer.But due to being sp2 hydridization knot in graphene face Structure causes mutually to adsorb between nanoparticle there are very strong molecular attraction, causes graphene to reunite together, is unable to stable dispersion In the polymer and its effect is played, or even intrinsic silicon can be caused defect occur.And the graphene monolithic Jing Guo oxidation processes Surface introduces the oxygen-containing functional groups such as many hydroxyls, carboxyl, can it is evenly dispersed in water, but graphene oxide is in alkali It is easy to happen flocculation under the conditions of property, it is unfavorable that this disperses graphene oxide in cement, or even can cause the intensity of concrete Loss.The present invention by add dispersing agent be prepared for can in cement stable dispersion graphene oxide dispersion, can It is enough in concrete, improves the comprehensive performance of concrete.
In order to overcome normal concrete and high performance concrete brittleness and existing fiber concrete and cement base it is compound The shortcomings that material, using the cellulose fibre with water storage function and toughening effect and the rice hull ash with ultrafine micropore structure (rice hull ash with porous structure can absorb moisture), " the interior maintenance action " of two kinds of materials can promote the aquation of cementitious material Process；In addition, by the way that modified carbon nano-tube and graphene oxide both components are added in concrete, to improve concrete Toughness, and make cementitious material in hydration process aquation more sufficiently, improve the crystal shape or even concrete of hydrated product The compactness extent of internal structure is finally reached the intensity and endurance quality for improving concrete, and promotes its toughness, plasticity and tension The target of intensity.
Summary of the invention
The object of the present invention is to provide a kind of super high strength high performance fiber concrete of C160 strength grade and its preparation sides Method, novelty of the invention, which ties up in concrete, to be mixed with cellulose fibre with toughening and interior maintenance action, has interior support A kind of carbon-free rice hull ash of novel active mineral admixture of shield effect, and the modification multi wall with toughening and nano-filled effect Carbon nanotube and graphene oxide.Synergistic effect between each component can promote cementitious material aquation more abundant, improve mixed Microcosmic composition inside solidifying soil, reduces detrimental voids quantity, keeps concrete inner structure more closely knit, finally prepares with super High intensity, high tenacity, high-durability, high volume stability novel high-performance fiber concrete material.
To achieve the above object, technical solution disclosed by the invention is:
A kind of super high strength high performance fiber concrete of C160 strength grade, the raw material including following mass fractions:
485 parts of cement, 82 parts of water, 1000 parts of rubble, 750 parts of fine aggregate, 70 parts of flyash, 73 parts of rice hull ash, silicon ash 102 Part, 14.0 parts of water-reducing agent, 9.5 parts of exciting agent, 1.6 parts of cellulose fibre, 40 parts of hydroxyl modification carbon nano tube dispersion liquid aoxidize stone 37 parts of black alkene dispersion liquid, 2.6 parts of defoaming agent.
The cement is I 62.5R portland cement of P, good with poly carboxylic acid series water reducer compatibility.
The fine aggregate uses mass ratio for the good high grade quartz sand of the scleroid river sand and gradation of 8:2, river sand Fineness modulus is 2.8-3.2, and dioxide-containing silica is not less than 98% in quartz sand, partial size 0.3-0.6mm, density 2.62g/ cm3。
Rubble selection gradation is good, fine and close hard, shaggy basaltic broken stone, by the 5- of continuous size fraction The rubble of 10mm, 10-16mm are used in mixed way according to the mass ratio of 7:3, and parent rock strength is not less than 250MPa, and maximum particle diameter is not More than 16mm.
The flyash is not more than 95% using high-quality I grade special fine powdered coal of power plant, water demand ratio, and specific surface area should be greater than 600m2/kg。
The mass percent of silica is not less than 93% in the silicon ash, and pozzolanic activity index is greater than 95%, averagely 0.1 μm -0.3 μm of partial size, specific surface area is greater than 15m2/g。
The water-reducing agent is polycarboxylate high performance water-reducing agent, and solid content 20%, pH value 7-8, water-reducing rate is 30% More than, 7d, 28d compressive strength rate are not less than 180%；
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
The rice hull ash be by rice husk 650-800 DEG C at a temperature of through burning, using ball mill grinding 30-40min Ash purple powder obtained, dioxide-containing silica 93.6%, partial size are 5-25 μm, and specific surface area is greater than 70m2/g。
The exciting agent is Organic-inorganic composite exciting agent, is compounded according to the raw material of following mass percent meters:
98% waterglass, 2% triethanolamine；
The modulus of the water glass solution is 1.2, is molten for 3.4 waterglass by industrial sodium hydroxide and commercially available modulus What liquid was formulated.
The cellulose fibre is UF500 cellulose fibre, and length 2-3mm, diameter is 15-20 μm, tensile strength >= 900MPa, elasticity modulus >=8.5GPa, fracture elongation reach 10%, specific gravity 1.1g/cm3, there is good hydrophily, compared with High bond stress and acid-proof alkaline.
The carbon nano tube dispersion liquid is hydroxyl modification carbon nano tube dispersion liquid, is successively to pass through alkali by multi-walled carbon nanotube Hydro-thermal reaction under the conditions of property obtains hydroxyl modification multi-wall carbon nano-tube pipe powder, then with surfactant and auxiliary agent in deionization It is obtained after decentralized processing in water.
The hydroxyl modification carbon nano tube dispersion liquid the preparation method is as follows:
1) compound concentration is the NaOH aqueous solution of 2.0M, weighs the NaOH water that 100 parts of preparations are added in 2 parts of multi-walled carbon nanotubes In solution, it is ultrasonically treated 5min；Carbon nano tube dispersion liquid is poured into autoclave, 180 DEG C of reaction 120min after sealing；It is cold afterwards But to room temperature, centrifuge separation is added deionized water and dilutes and wash, removes clear liquid；Ultrasound 10min again, stirring, vinylidene chloride filter Film filtering, gained solid product are washed to filtrate as neutrality；Dry 12h, obtains the oxygen-containing functional groups such as surface hydroxyl at 40 DEG C Modified multiwalled carbon nanotube；
2) modified multiwalled carbon nanotube, the surface-active of the oxygen-containing functional groups such as the surface hydroxyl prepared in step 1) are weighed 0.5 part of agent, 0.1 part of defoaming agent and 98 parts of deionized water, surfactant, defoaming agent and modified carbon nano-tube are successively distributed to In deionized water, stirring soaks carbon nanotube completely by aqueous surfactant solution；It is ultrasonically treated 30min；Later to dispersion Liquid carries out centrifugal sedimentation；
3) supernatant liquid is crossed into 300 mesh filter clothes, obtains carbon nano tube dispersion liquid 1；The carbon nanotube that bottom precipitation is reunited It carries out ultrasound 60min again according to step 2), obtains carbon nano tube dispersion liquid 2, hydroxyl modification in carbon nano tube dispersion liquid 1 and 2 Multi-walled carbon nanotube uniform and stable can disperse in water.
The multi-walled carbon nanotube is averaged caliber as 40-50nm, and length is 10-20 μm, purity >=98%.
The surfactant is Triton X-100, and pH=7.0,63 DEG C of cloud point, be a kind of non-ionic table Face activating agent；The defoaming agent is U.S.'s Hexion AXILAT DF6352DD defoaming agent.
The graphene oxide dispersion is obtained by following methods:
(1) 100 parts of deionized waters are added in 1 part of graphene oxide powder to obtain using ultrasonic machine ultrasonic disperse 30min To finely dispersed graphene oxide dispersion；
(2) 0.1 part of water-reducing agent is added in 50 parts of deionized waters, is stirred evenly, the oxygen of step (1) preparation is then added Graphite alkene dispersion liquid stirs 90s using special-purpose stirring machine, finally obtains graphene oxide that can be evenly dispersed in cement Dispersion liquid.
The graphene oxide is powdered, purity >=98%, and 10-20 μm of diameter, surface has a large amount of oxygen-containing group It rolls into a ball, in water dispersion degree with higher；
The water-reducing agent is polycarboxylate high performance water-reducing agent, solid content 20%, pH value 7.
The invention also discloses a kind of preparation methods of the super high strength high performance fiber concrete of C160 strength grade, including Following steps:
1) mass fraction is dissolved in the water of total Water 25% for 9.5 parts of exciting agent and 2.6 parts of defoaming agents, is denoted as water-soluble 14.0 parts of water-reducing agents, 40 parts of hydroxyl modification carbon nano tube dispersion liquids and 37 parts of graphene oxide dispersions are added to total water by liquid 1 In the aqueous solution of amount 50%, it is denoted as aqueous solution 2；
2) weighing 750 parts in mass ratio is the river sand and quartz sand, 1000 parts of rubbles and 1.6 parts of cellulose fibers of 8:2 configuration Dimension is added sequentially in blender, uniform stirring 2-3min；
3) 485 parts of cement, 70 parts of flyash, 73 parts of rice hull ash, 102 parts of silicon ashes then, are sequentially added, then will be in step 1) The aqueous solution 1 of preparation is added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 2 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continuously adds the water of total Water remaining 25%, uniform stirring 3-5min, It discharges to get prepared concrete mix is arrived；And it forms, conserve.
Concrete uses steam curing in the preparation method, forms as follows with maintenance process:
Concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 ± 2 DEG C, relative humidity >= 1d is stood in 95% standard curing room, demoulding moves to concrete in High Temperature Curing equipment, and (heating rate is for heating heating 10 DEG C per hour) to 90 DEG C, thermostatic curing 2d, after cooling (cooling rate is 10 DEG C per hour) to room temperature, in standard curing room Pond (being saturated limewater solution in pond, solution temperature is 20 ± 2 DEG C) in maintenance to required age.
The present invention use for the first time cellulose fibre, rice hull ash, modified carbon nano-tube, graphene oxide, cement, flyash, Quartz sand, river sand, rubble, chemical admixture (including water-reducing agent, exciting agent, defoaming agent), water are prepared for a kind of with high volume Stability, high tenacity, high-durability C160 strength grade super high strength high performance fiber concrete, overcome normal concrete The deficiencies of brittleness is big, easy to crack, durability is poor.
The beneficial effects of the present invention are:
1) cellulose fibre used in the present invention has natural hydrophily and high-elastic model point, can effectively inhibit mixed The formation and development of microcrack caused by the factors such as solidifying soil plastic shrinkage, drying shrinkage, temperature change；Cellulose fiber surface has very Strong bond stress has good cementitiousness with cement matrix, prevents spike protein gene in concrete cracking, prevent crack Further development, and the fracture of fiber can increase the energy dissipation capacity of concrete；In addition, cellulose fibre has unique fiber Cavity structure and huge specific surface area, cavity structure can store partial moisture, play " interior maintenance action ", promote coagulation The heat evolution velocity of soil.Therefore, it is resistance to can be improved mechanical property and cracking resistance, impervious and freeze thawing resistance of concrete etc. for cellulose fibre Long performance.
2) silica for containing 90% or more in the present invention by the rice hull ash that combusting rice hull, grinding obtain, has higher Pozzolanic activity, the particle of rice hull ash is tiny (particle be 5-25 μm), the porous and net road structure inside rice hull ash particle Huge specific surface area is made it have, 70m can be reached2/ g or more.Therefore, incorporation rice hull ash can make gelling material particles more Uniformly, gradation is good, can play filling role, increases the cohesiveness of concrete；Secondly as a large amount of inside rice hull ash Microcellular structure can water storage, play " interior maintenance action "；In addition, since rice hull ash has pozzolanic activity similar with silicon ash, It can replace the Ca (OH) in partially or completely silicon ash, with concrete system2Reaction generates fine and close hard aquation sulphur aluminic acid Calcium improves concrete flexural strength, compression strength, tensile splitting strength, endurance quality；Finally, rice hull ash is as agricultural residue, It is used as construction material replacing partial cement after being processed to, can reduce since rice husk burns and the CO in cement production process2Row High-volume, and then concrete cost is reduced, realizes the recycling of agricultural wastes, reaches energy-saving and environment-friendly purpose.
3) present invention is dispersed and is ultrasonically treated to multi-walled carbon nanotube using surfactant, is not cutting off carbon nanometer It pipe and does not destroy on the basis of its surface texture, obtains the modified multiwalled carbon nanotube dispersion liquid for capableing of stable dispersion in water. Due to the nanometer size effect and skin effect of carbon nanotube, bridge linking effect is played as nano-scale fiber, control nanoscale is split The emergence and development of seam increase the intensity etc. of concrete base material；In addition, the micro-packing effect of carbon nanotube, can fill Most of detrimental voids of inside concrete increase the compactness of concrete, improve the various aspects such as toughness of concrete, endurance quality Performance.
4) present invention by addition dispersing agent be prepared for can in cement stable dispersion graphene oxide dispersion.Oxygen On the one hand graphite alkene plays the role of nano-filled, on the other hand the oxygen-containing functional group on its surface can be with hydrolysis product of cement hydrogen Calcium oxide, entringite, hydrated calcium silicate etc. further react, and change the shape of hydrated cementitious crystalline product, enhance cement matrix Toughness, make concrete structure anti-folding with higher with compression strength etc., and enhance the caking property between concrete and fashioned iron Energy.
There is the rice hull ash of volcano ash effect, physics filing effect and " interior maintenance action " by adding, there is toughening to make With the cellulose fibre with " interior maintenance action ", and modified carbon nano-tube and the oxidation of microfibre filled toughening effect can be played Graphene etc., collaboration improves concrete performance between each component, is configured to a kind of resistance to high intensity, high volume stability, height The super high strength high performance fiber concrete of the C160 strength grade of long property and higher toughness.
Above-mentioned measure can effectively improve compression strength, toughness, deformability, the endurance quality etc. of concrete, and enhance Adhesion strength and cooperative transformation ability between concrete and fashioned iron.The C160 intensity that the method is prepared through the invention The superhigh intensity high performance concrete of grade, 28d age cubic compressive strength reach 167.74MPa, and flexural strength reaches 35.21MPa, split tensile strength reach 14.59MPa, and the adhesion strength between fashioned iron reaches 7.54MPa, agent on crack resistance of concrete chloride ion Infiltration grade is VI grade of (28d unstable state chloride ion transport coefficient DRCM< 10 × 10-14m2/s).The present invention, which has prepared to have, to be surpassed High intensity, high volume stability, high-durability and high tenacity high-performance fiber concrete, raw material are easy to get, preparation process Simply, the requirement for meeting sustainable development and the application of Modern Green construction material and popularization is a kind of environmentally protective novel height Performance fibers concrete material.
Specific embodiment
With reference to embodiment, the present invention is described in further detail using embodiment, so that advantage of the invention is easier to In the protection scope for being readily appreciated by one skilled in the art, but being not intended to restrict the invention.
The preparation method of the super high strength high performance fiber concrete of C160 strength grade of the present invention, includes the following steps:
1) mass fraction is dissolved in the water of total Water 25% for 9.5 parts of exciting agent and 2.6 parts of defoaming agents, is denoted as water-soluble 14.0 parts of water-reducing agents, 40 parts of hydroxyl modification carbon nano tube dispersion liquids and 37 parts of graphene oxide dispersions are added to total water by liquid 1 In the aqueous solution of amount 50%, it is denoted as aqueous solution 2；
2) weighing 750 parts in mass ratio is the river sand and quartz sand, 1000 parts of rubbles and 1.6 parts of cellulose fibers of 8:2 configuration Dimension is added sequentially in blender, uniform stirring 2-3min；
3) 485 parts of cement, 70 parts of flyash, 73 parts of rice hull ash, 102 parts of silicon ashes then, are sequentially added, then will be in step 1) The aqueous solution 1 of preparation is added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 2 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continuously adds the water of total Water remaining 25%, uniform stirring 3-5min, It discharges to get prepared concrete mix is arrived；And it forms, conserve.
Concrete uses steam curing in preparation method used, forms as follows with maintenance process:
Concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 ± 2 DEG C, relative humidity >= 1d is stood in 95% standard curing room, demoulding moves to concrete in High Temperature Curing equipment, and (heating rate is for heating heating 10 DEG C per hour) to 90 DEG C, thermostatic curing 2d, after cooling (cooling rate is 10 DEG C per hour) to room temperature, in standard curing room Pond (being saturated limewater solution in pond, solution temperature is 20 ± 2 DEG C) in maintenance to required age.
Cement used is I 62.5R portland cement of P, good with poly carboxylic acid series water reducer compatibility.
Fine aggregate used uses mass ratio for the good high grade quartz sand of the scleroid river sand and gradation of 8:2, river sand Fineness modulus is 2.8-3.2, and dioxide-containing silica is not less than 98% in quartz sand, partial size 0.3-0.6mm, density 2.62g/ cm3。
Rubble used selection gradation is good, fine and close hard, shaggy basaltic broken stone, by the 5- of continuous size fraction The rubble of 10mm, 10-16mm are used in mixed way according to the mass ratio of 7:3, and parent rock strength is not less than 250MPa, and maximum particle diameter is not More than 16mm.
Flyash used is not more than 95% using high-quality I grade special fine powdered coal of power plant, water demand ratio, and specific surface area should be greater than 600m2/kg。
The mass percent of silica is not less than 93% in silicon ash used, and pozzolanic activity index is greater than 95%, averagely 0.1 μm -0.3 μm of partial size, specific surface area is greater than 15m2/g。
Water-reducing agent used is polycarboxylate high performance water-reducing agent, and solid content 20%, pH value 7-8, water-reducing rate is 30% More than, 7d, 28d compressive strength rate are not less than 180%.
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
Rice hull ash used be by rice husk 650-800 DEG C at a temperature of through burning, using ball mill grinding 30-40min Ash purple powder obtained, dioxide-containing silica 93.6%, partial size are 5-25 μm, and specific surface area is greater than 70m2/g。
Exciting agent used is Organic-inorganic composite exciting agent, is compounded according to the raw material of following mass percent meters:
98% waterglass, 2% triethanolamine；
Wherein, the modulus of water glass solution is 1.2, is the waterglass for being 3.4 by industrial sodium hydroxide and commercially available modulus Solution is formulated.
Cellulose fibre used is the UF500 cellulose fibre of U.S. Burkeye company research and development, length 2-3mm, diameter It is 15-20 μm, tensile strength >=900MPa, elasticity modulus >=8.5GPa, fracture elongation reaches 10%, specific gravity 1.1g/ cm3, there is good hydrophily, higher bond stress and acid-proof alkaline.
Hydroxyl modification carbon nano tube dispersion liquid used is as made from following methods:
1) compound concentration is the sodium hydrate aqueous solution of 2.0M, weighs the hydrogen that 100 parts of preparations are added in 2 parts of multi-walled carbon nanotubes In aqueous solution of sodium oxide, it is ultrasonically treated 5min；Carbon nano tube dispersion liquid is poured into the height of the stainless steel with politef liner Press reaction kettle, 180 DEG C of reaction 120min after sealing；After be cooled to room temperature (centrifugation rate 2000r/ be centrifuged Min, centrifugation time 30min), deionized water is then added and dilutes and washs, removing clear liquid, 2 times repeatedly；It is then ultrasonic again 10min, the vinylidene chloride membrane filtration for being 0.2 μm by diameter after stirring, gained solid product are cleaned with deionized water to filter Liquid pH=7；Dry 12h at 40 DEG C, obtains the modification multi-wall carbon nano-tube of the oxygen-containing functional groups such as surface hydroxyl in vacuum drying oven Pipe.
2) modified multiwalled carbon nanotube, the surface-active of the oxygen-containing functional groups such as the surface hydroxyl prepared in step 1) are weighed 0.5 part of agent, 0.1 part of defoaming agent and 98 parts of deionized water, surfactant, defoaming agent and modified carbon nano-tube are successively distributed to In deionized water, stirring soaks carbon nanotube completely by aqueous surfactant solution；It is ultrasonically treated 30min；Later to dispersion Liquid carries out centrifugal sedimentation (centrifugation rate 2000r/min, centrifugation time 30min).
3) after being centrifuged, supernatant liquid is crossed into 300 mesh filter clothes, obtains carbon nano tube dispersion liquid 1；(i.e. by bottom precipitation The carbon nanotube of reunion) according to step 2) ultrasonic treatment 60min is carried out again, obtain carbon nano tube dispersion liquid 2, carbon nanotube point Hydroxyl modification multi-walled carbon nanotube uniform and stable can disperse in water in dispersion liquid 1 and 2.
Wherein, multi-walled carbon nanotube is averaged caliber as 40-50nm, and length is 10-20 μm, purity >=98%；Surface-active Agent is Triton X-100, pH=7.0,63 DEG C of cloud point；Defoaming agent is U.S.'s Hexion AXILAT DF6352DD defoaming Agent.
Graphene oxide dispersion used is obtained by following methods:
(1) 100 parts of deionized waters are added in 1 part of graphene oxide powder to obtain using ultrasonic machine ultrasonic disperse 30min To finely dispersed graphene oxide dispersion；
(2) 0.1 part of water-reducing agent is added in 50 parts of deionized waters, is stirred evenly, the oxygen of step (1) preparation is then added Graphite alkene dispersion liquid stirs 90s using special-purpose stirring machine, finally obtains graphene oxide that can be evenly dispersed in cement Dispersion liquid.
Wherein, graphene oxide used is powdered, purity >=98%, and 10-20 μm of diameter, surface, which has, largely to be contained Oxygen groups, in water dispersion degree with higher；Water-reducing agent used be polycarboxylate high performance water-reducing agent, solid content 20%, PH value is 7.
Specific embodiment is given below to further illustrate preparation method of the present invention.
The match ratio of the super high strength high performance fiber concrete of C160 strength grade described in the present embodiment (presses each component quality Number meter) it is as follows:
485 parts of cement, 82 parts of water, 1000 parts of rubble, 750 parts of fine aggregate, 70 parts of flyash, 73 parts of rice hull ash, silicon ash 102 Part, 14.0 parts of water-reducing agent, 9.5 parts of exciting agent, 1.6 parts of cellulose fibre, 40 parts of hydroxyl modification carbon nano tube dispersion liquid aoxidize stone 37 parts of black alkene dispersion liquid, 2.6 parts of defoaming agent.
The performance test results of the super high strength high performance fiber concrete of C160 strength grade described in the present embodiment such as 1 institute of table Show.
The super high strength high performance fiber concrete basic performance of 1 C160 strength grade of table
As can be seen from the above Table 1, the super high strength high performance fiber concrete of C160 strength grade of the present invention is a kind of property The good concrete of energy, can be used as Modern Green construction material application.
The above description is only an embodiment of the present invention, be in conjunction with specific optimal enforcement mode to it is of the invention it is further in detail It describes in detail bright, cannot therefore limit the scope of the invention, those skill in the art related utilize present disclosure With method, or under the premise of not departing from present inventive concept, simple change or replacement is made, all should be considered as of the invention In protection scope.Protection scope of the present invention should be subject to the protection scope that disclosed claim defines.

Claims (8)

1. a kind of super high strength high performance fiber concrete of C160 strength grade, which is characterized in that fiber concrete includes following The raw material of mass fraction:
485 parts of cement, 82 parts of water, 1000 parts of rubble, 750 parts of fine aggregate, 70 parts of flyash, 73 parts of rice hull ash, 102 parts of silicon ash, 14.0 parts of water-reducing agent, 9.5 parts of exciting agent, 1.6 parts of cellulose fibre, 40 parts of hydroxyl modification carbon nano tube dispersion liquid, graphite oxide 37 parts of alkene dispersion liquid, 2.6 parts of defoaming agent；
The rice hull ash be by rice husk 650-800 DEG C at a temperature of by burning, being made using ball mill grinding 30-40min Grey purple powder, dioxide-containing silica 93.6%, partial size be 5-25 μm, specific surface area be greater than 70m2/g；
The cellulose fibre is UF500 cellulose fibre, and length 2-3mm, diameter is 15-20 μm, tensile strength >= 900MPa, elasticity modulus >=8.5GPa, fracture elongation reach 10%, specific gravity 1.1g/cm3；
The graphene oxide is powdered, purity >=98%, and 10-20 μm of diameter, surface has a large amount of oxygen-containing group, Dispersion degree with higher in water.
2. the super high strength high performance fiber concrete of C160 strength grade according to claim 1, which is characterized in that described Cement is I 62.5R portland cement of P, good with poly carboxylic acid series water reducer compatibility；
The fine aggregate uses mass ratio for the good high grade quartz sand of the scleroid river sand and gradation of 8:2, river sand fineness Modulus is 2.8-3.2, and dioxide-containing silica is not less than 98% in quartz sand, partial size 0.3-0.6mm, density 2.62g/cm3；
Rubble selection gradation is good, fine and close hard, shaggy basaltic broken stone, by 5-10mm, 10- of continuous size fraction The rubble of 16mm is used in mixed way according to the mass ratio of 7:3, and parent rock strength is not less than 250MPa, and maximum particle diameter is no more than 16mm；
The flyash is not more than 95% using high-quality I grade special fine powdered coal of power plant, water demand ratio, and specific surface area should be greater than 600m2/kg；
The mass percent of silica is not less than 93% in the silicon ash, and pozzolanic activity index is greater than 95%, average grain diameter 0.1-0.3 μm, specific surface area is greater than 15m2/g；
The water-reducing agent is polycarboxylate high performance water-reducing agent, solid content 20%, pH value 7-8, water-reducing rate 30% or more, 7d, 28d compressive strength rate are not less than 180%；
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
3. the super high strength high performance fiber concrete of C160 strength grade according to claim 1, which is characterized in that described Exciting agent is Organic-inorganic composite exciting agent, is compounded according to the raw material of following mass percent meters:
98% waterglass, 2% triethanolamine；
The modulus of the water glass solution is 1.2, is that the water glass solution for being 3.4 by industrial sodium hydroxide and commercially available modulus is matched It makes.
4. the super high strength high performance fiber concrete of C160 strength grade according to claim 1, which is characterized in that described Hydroxyl modification carbon nano tube dispersion liquid is as made from following methods:
1) compound concentration is the NaOH aqueous solution of 2.0M, weighs the NaOH aqueous solution that 100 parts of preparations are added in 2 parts of multi-walled carbon nanotubes In, it is ultrasonically treated 5min；Carbon nano tube dispersion liquid is poured into autoclave, 180 DEG C of reaction 120min after sealing；After be cooled to Room temperature, centrifuge separation are added deionized water and dilute and wash, remove clear liquid；Ultrasound 10min again, stirring, vinylidene chloride filter membrane mistake Filter, gained solid product are washed to filtrate as neutrality；Dry 12h, obtains the modification of surface hydroxyl oxygen-containing functional group at 40 DEG C Multi-walled carbon nanotube；
2) modified multiwalled carbon nanotube, the surfactant 0.5 of the surface hydroxyl oxygen-containing functional group prepared in step 1) are weighed Part, 0.1 part of defoaming agent and 98 parts of deionized water, by surfactant, defoaming agent and modified carbon nano-tube be successively distributed to from In sub- water, stirring soaks carbon nanotube completely by aqueous surfactant solution；It is ultrasonically treated 30min；Later to dispersion liquid into Row centrifugal sedimentation；
3) supernatant liquid is crossed into 300 mesh filter clothes, obtains carbon nano tube dispersion liquid 1；By bottom precipitation reunite carbon nanotube according to Step 2) carries out ultrasound 60min again, obtains carbon nano tube dispersion liquid 2, hydroxyl modification multi wall in carbon nano tube dispersion liquid 1 and 2 Carbon nanotube uniform and stable can disperse in water.
5. the super high strength high performance fiber concrete of C160 strength grade according to claim 4, which is characterized in that described Multi-walled carbon nanotube is averaged caliber as 40-50nm, and length is 10-20 μm, purity >=98%；
The surfactant be Triton X-100, pH=7.0,63 DEG C of cloud point；
The defoaming agent is U.S.'s Hexion AXILAT DF6352DD defoaming agent.
6. the super high strength high performance fiber concrete of C160 strength grade according to claim 1, which is characterized in that described Graphene oxide dispersion is obtained by following methods:
(1) 100 parts of deionized waters are added in 1 part of graphene oxide powder to be divided using ultrasonic machine ultrasonic disperse 30min Dissipate uniform graphene oxide dispersion；
(2) 0.1 part of water-reducing agent is added in 50 parts of deionized waters, is stirred evenly, the oxidation stone of step (1) preparation is then added Black alkene dispersion liquid stirs 90s, obtains graphene oxide dispersion；
The water-reducing agent is polycarboxylate high performance water-reducing agent, solid content 20%, pH value 7.
7. a kind of preparation side of the super high strength high performance fiber concrete of C160 strength grade described in any one of claims 1-6 Method, which comprises the steps of:
1) mass fraction is dissolved in the water of total Water 25% for 9.5 parts of exciting agent and 2.6 parts of defoaming agents, is denoted as aqueous solution 1, 14.0 parts of water-reducing agents, 40 parts of hydroxyl modification carbon nano tube dispersion liquids and 37 parts of graphene oxide dispersions are added to total Water In 50% aqueous solution, it is denoted as aqueous solution 2；
2) weigh 750 parts in mass ratio for 8:2 configuration river sand and quartz sand, 1000 parts of rubbles and 1.6 parts of cellulose fibres according to It is secondary to be added in blender, uniform stirring 2-3min；
3) 485 parts of cement, 70 parts of flyash, 73 parts of rice hull ash, 102 parts of silicon ashes then, are sequentially added, then will be prepared in step 1) Aqueous solution 1 be added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 2 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continuously adds the water of total Water remaining 25%, uniform stirring 3-5min, out Expect to get prepared concrete mix is arrived；And it forms, conserve.
8. a kind of molding of the super high strength high performance fiber concrete of C160 strength grade described in any one of claims 1-6 is supported Maintaining method, which is characterized in that use steam curing method, include the following steps:
Concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 ± 2 DEG C, relative humidity >=95% 1d is stood in standard curing room, demoulding moves to concrete in High Temperature Curing equipment, is heated to 10 DEG C of heating rates per hour It is 90 DEG C, thermostatic curing 2d, molten in the saturated limewater of standard curing room after being cooled to room temperature with speed identical with heating rate Liquid, solution temperature are to conserve in 20 ± 2 DEG C of ponds to required age.
CN201710702351.0A 2017-08-16 2017-08-16 A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof Active CN107382205B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710702351.0A CN107382205B (en) 2017-08-16 2017-08-16 A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710702351.0A CN107382205B (en) 2017-08-16 2017-08-16 A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof

Publications (2)

Publication Number Publication Date
CN107382205A CN107382205A (en) 2017-11-24
CN107382205B true CN107382205B (en) 2019-10-22

Family

ID=60353198

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710702351.0A Active CN107382205B (en) 2017-08-16 2017-08-16 A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof

Country Status (1)

Country Link
CN (1) CN107382205B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108046671A (en) * 2017-12-29 2018-05-18 河北建筑工程学院 A kind of rice hull ash concrete and preparation method thereof
DE102018100850A1 (en) * 2018-01-16 2019-07-18 Universität Kassel Solid mass for the production of a thermally stable and cyclic claimable ultra-high-strength concrete or high-strength concrete or an ultra-high-strength or high-strength concrete component
CN108523257A (en) * 2018-03-28 2018-09-14 佛山市仰慕服饰有限公司 A kind of multifunction emulsion cotton health-care bra and preparation method thereof
CN108439872B (en) * 2018-05-15 2021-04-09 中国石油天然气集团有限公司 High-temperature-resistant high-strength low-elastic-modulus high-density cement paste
CN108439918A (en) * 2018-05-22 2018-08-24 暨南大学 A kind of high performance concrete and preparation method thereof for using rice hull ash, silicon ash and graphene oxide to be prepared for admixture
CN108516768A (en) * 2018-05-22 2018-09-11 暨南大学 A kind of high performance concrete and preparation method thereof for using rice hull ash, silicon ash and carbon nanotube to be prepared for admixture
CN109437692A (en) * 2018-12-10 2019-03-08 武汉轻工大学 Noise abatement insulating wall material and preparation method thereof and noise abatement insulation blocks and preparation method thereof
CN110407536A (en) * 2019-07-31 2019-11-05 大连理工大学 A kind of carbon nanotube composite high-performance concrete having impact resistance
CN110407539A (en) * 2019-07-31 2019-11-05 大连理工大学 A kind of surface functional group processing carbon nano-tube modification Reactive Powder Concrete of high impact properties
CN110529668A (en) * 2019-08-28 2019-12-03 福州森百德机电科技有限公司 Cementitious composite pipe and preparation method thereof
CN110550919A (en) * 2019-09-29 2019-12-10 北京工业大学 method for improving chloride ion permeation resistance of cement-based material
CN113185210B (en) * 2020-09-23 2023-07-25 西安建筑科技大学 High-toughness high-cohesiveness C160 strength ultrahigh-strength fiber concrete and preparation method thereof
CN113416016B (en) * 2021-06-29 2023-04-11 武汉理工大学 Concrete anti-shrinkage carbon-based nano reinforcing agent and preparation method thereof
CN113754384A (en) * 2021-10-13 2021-12-07 盐城工学院 Strong acid corrosion resistant cement mortar and preparation method thereof
CN115872700B (en) * 2022-11-29 2023-11-17 中南林业科技大学 Concrete and hollow steel tube concrete rectangular beam

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1843904A (en) * 2006-03-30 2006-10-11 复旦大学 Method for conducting modification of surface hydroxy group of carbon nanotube
CN104030634A (en) * 2014-06-12 2014-09-10 杭州固华复合材料科技有限公司 High-strength and high-toughness reactive powder concrete of carbon doped nano-tube and preparation method of high-strength and high-toughness reactive powder concrete
CN106396555A (en) * 2016-09-08 2017-02-15 东南大学 Cellulose fiber internal curing-based ultra-high-performance cement-based composite material and preparation method thereof
CN106431137A (en) * 2016-09-21 2017-02-22 太原理工大学 Grapheme concrete and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1843904A (en) * 2006-03-30 2006-10-11 复旦大学 Method for conducting modification of surface hydroxy group of carbon nanotube
CN104030634A (en) * 2014-06-12 2014-09-10 杭州固华复合材料科技有限公司 High-strength and high-toughness reactive powder concrete of carbon doped nano-tube and preparation method of high-strength and high-toughness reactive powder concrete
CN106396555A (en) * 2016-09-08 2017-02-15 东南大学 Cellulose fiber internal curing-based ultra-high-performance cement-based composite material and preparation method thereof
CN106431137A (en) * 2016-09-21 2017-02-22 太原理工大学 Grapheme concrete and preparation method thereof

Also Published As

Publication number Publication date
CN107382205A (en) 2017-11-24

Similar Documents

Publication Publication Date Title
CN107382205B (en) A kind of super high strength high performance fiber concrete of C160 strength grade and preparation method thereof
CN107285711B (en) A kind of C250 strength grade very-high performance fiber concrete and preparation method thereof containing coarse aggregate
CN107285708B (en) A kind of C240 strength grade very-high performance fiber concrete and preparation method thereof containing coarse aggregate
CN107285707B (en) coarse aggregate-containing C220 strength grade ultrahigh-performance fiber concrete and preparation method thereof
CN107352913B (en) A kind of super high strength high performance fiber concrete of C180 strength grade and preparation method thereof
CN107512887B (en) A kind of C230 strength grade very-high performance fiber concrete and preparation method thereof containing coarse aggregate
CN107352915B (en) A kind of high-performance fiber concrete of C110 strength grade and preparation method thereof
CN107352914B (en) A kind of high-performance fiber concrete of C150 strength grade and preparation method thereof
CN107285709B (en) A kind of high-performance fiber concrete of C120 strength grade and preparation method thereof
CN107512888B (en) A kind of high-performance fiber concrete of C140 strength grade and preparation method thereof
CN107352912B (en) A kind of super high strength high performance fiber concrete of C170 strength grade and preparation method thereof
CN111892325B (en) Preparation method of wet-milling dechlorination nano-alkali residue inorganic salt early strength agent
CN108117335A (en) A kind of graphene oxide concrete of fly ash and preparation method thereof
CN107512890B (en) A kind of super high strength high performance fiber concrete of C190 strength grade and preparation method thereof
CN107352916A (en) A kind of very-high performance fiber concrete of C210 strength grades containing coarse aggregate and preparation method thereof
CN107324728B (en) A kind of high-performance fiber concrete of C80 strength grade and preparation method thereof
CN107512886B (en) A kind of super high strength high performance fiber concrete of C200 strength grade and preparation method thereof
Gao et al. Effect of the dosage of MWCNT's on deterioration resistant of concrete subjected to combined freeze–thaw cycles and sulfate attack
CN107512889B (en) A kind of high-performance fiber concrete of C130 strength grade and preparation method thereof
CN107324729B (en) A kind of high-performance fiber concrete of C100 strength grade and preparation method thereof
CN113024211B (en) High-toughness high-cohesiveness C150 strength ultrahigh-strength fiber concrete and preparation method thereof
CN115448659B (en) Solid waste stainless steel slag recycled concrete based on early carbonization and early dry-wet cycle coupling effect and preparation method thereof
CN107298563B (en) A kind of high-performance fiber concrete of C90 strength grade and preparation method thereof
CN113233832A (en) High-toughness high-cohesiveness C180-strength ultrahigh-strength fiber concrete and preparation method thereof
CN113024188B (en) High-toughness high-cohesiveness C190 strength ultrahigh-strength fiber concrete and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20171124

Assignee: Xi'an Jianke Baolong New Material Co.,Ltd.

Assignor: XI'AN University OF ARCHITECTURE & TECHNOLOGY

Contract record no.: X2020980009912

Denomination of invention: A kind of super high strength and high performance fiber concrete with C160 strength grade and its preparation method

Granted publication date: 20191022

License type: Common License

Record date: 20201224

EE01 Entry into force of recordation of patent licensing contract
EC01 Cancellation of recordation of patent licensing contract

Assignee: Xi'an Jianke Baolong New Material Co.,Ltd.

Assignor: XIAN University OF ARCHITECTURE AND TECHNOLOG

Contract record no.: X2020980009912

Date of cancellation: 20220506

EC01 Cancellation of recordation of patent licensing contract