CN111233390A - Ultrahigh-performance anti-abrasion concrete - Google Patents
Ultrahigh-performance anti-abrasion concrete Download PDFInfo
- Publication number
- CN111233390A CN111233390A CN202010043078.7A CN202010043078A CN111233390A CN 111233390 A CN111233390 A CN 111233390A CN 202010043078 A CN202010043078 A CN 202010043078A CN 111233390 A CN111233390 A CN 111233390A
- Authority
- CN
- China
- Prior art keywords
- parts
- ultra
- high performance
- aggregate
- abrasion
- 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.)
- Pending
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
- 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
- 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
- C04B2111/72—Repairing or restoring existing buildings or building 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
- 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
Abstract
The invention relates to ultra-high performance anti-abrasion concrete, which takes cement, micro-beads and silica fume as cementing materials, aggregates and superfine aggregates are added to perfect the grain composition, and nanometer superfine silicon dioxide, fibers, a water reducing agent, a defoaming agent, a regulator, a coagulant and a retarder are added to serve as functional auxiliaries, so that the ultra-high performance anti-abrasion concrete can be used for building or repairing parts with anti-abrasion damage in hydraulic buildings, can also be used for engineering parts with structural impact damage needing to be repaired, and has good construction performance, mechanical property and anti-abrasion performance.
Description
Technical Field
The invention relates to the technical field of cement-based building materials, in particular to ultra-high-performance anti-abrasion concrete and application thereof.
Background
By combining the current research situation at home and abroad, the research and application of the current anti-impact wear materials are mainly divided into the following 3 types: 1) the thin-layer repairing material is mainly represented by polyurea anti-impact wear-resistant paint, resin mortar, polymer cemented concrete, furan concrete and the like; 2) surface protective materials, mainly represented by steel plates, barred rocks, cast stone plates and the like; 3) the high-performance anti-abrasion concrete is mainly represented by silica powder series concrete, fiber reinforced concrete, HF concrete, fly ash concrete and the like. However, polyurea, resin mortar and other anti-abrasion materials mainly solve the problem of repairing a thin layer damaged by abrasion of sand-containing water with more suspended load, and have great limitation when being applied to solve the problem of concrete diseases with serious load damage in a large area; meanwhile, the materials have high cost, complex construction and certain toxicity. The surface protective material, such as steel plate, although having good impact toughness, is difficult to bond with the substrate concrete firmly, the steel plate as the protective material is usually not broken by abrasion, but is lifted by the water flow to be washed away, thus not playing the essential role of steel and having higher cost; granite and other stone strips are hard in texture and good in abrasion resistance, but the granite and other stone strips are poor in impact toughness, difficult to mine, process and transport, troublesome in construction, time-consuming and labor-consuming; the cast stone plate can resist the impact grinding damage of high-speed water flow containing suspended sediment, but the material has larger brittleness, small impact strength, easy breaking and narrower application range.
With the intensive research on the anti-abrasion concrete, the concrete is required to have good anti-abrasion capability, not only higher strength, but also better crack resistance, impact resistance, toughness and other properties, and meanwhile, good construction performance is required to be ensured. In order to ensure that the concrete has excellent abrasion resistance, the concrete can be formulated with reference to the following 3 points: 1) the water-cement ratio is reduced by using additives such as a high-efficiency water reducing agent and the like, the structure of the concrete is improved, and the strength of the concrete is improved; 2) adding admixtures (such as superfine mineral admixtures, polymers, fibers and the like), optimizing the particle distribution of the cementing material, improving the performance of the cementing material and improving the internal structure of concrete; 3) high-strength aggregate is selected, and the anti-abrasion performance of the concrete is improved by improving the performance of the aggregate
Ultra high performance concrete is a special cement-based material, developed on the basis of Reactive Powder Concrete (RPC). Since RPC is a proprietary product, in order to avoid disputes of intellectual property rights, Europe does not use this term at present, but instead refers to "Ultra-High Performance Concrete" (UHPC). UHPC is an ultra-high strength cement-based material with high strength, high toughness and low porosity. The basic preparation principle is as follows: by increasing the fineness and activity of the components, coarse aggregate is not used, and defects (pores and microcracks) in the material are minimized, so that ultrahigh strength and high durability are obtained. The UHPC has excellent performance and extremely high strength, the toughness of the UHPC can be compared favorably with that of metal, and the UHPC with the strength of up to 800MPa can be manufactured by a special means.
There are a lot of projects under construction and proposed, and these projects still have the problem that the bed load wears the concrete. The conventional anti-abrasion concrete can not resist the bed load problem with large particle size, and can be repaired in the dead cycle of repair all the year round, aiming at the problem, the ultra-high performance anti-abrasion concrete with coarse aggregate removal, low water-cement ratio and ultrahigh strength is adopted to construct and repair the part with the anti-abrasion performance requirement.
Disclosure of Invention
In order to solve the technical problems that the anti-abrasion material and the Ultra-high performance concrete in the prior art can not be applied to hydraulic engineering, particularly underwater engineering under a flowing water corrosion environment (referred to as a flow corrosion environment) can not be constructed or repaired, the invention takes cement, micro-beads and silica fume as cementing materials, aggregates and superfine aggregates are added to perfect the particle grading, nano superfine silicon dioxide, fibers, a water reducing agent, a defoaming agent, a regulator, an accelerant and a retarder are added as functional additives, a new product is prepared by adjusting the using amount of the raw materials, and is named as Ultra-high performance anti-wear concrete (UHPAC for short), the part with the impact damage in the hydraulic building can be repaired or repaired, the Ultra-high performance anti-wear concrete can also be used at the engineering part with the structural impact damage and needing to be repaired, and the site construction has good construction performance for half an hour, the concrete has the advantages of strength within 6 hours, good construction performance, high early strength, suitability for engineering parts in construction period, and compressive strength of over 120 MPa after 28-day maintenance.
Specifically, the ultra-high performance anti-abrasion concrete is prepared from the following raw materials in parts by weight:
cement: 800-1000 parts;
microbeads: 90-120 parts;
silica fume: 90-120 parts;
nano ultra-fine silica: 1-4 parts;
fiber: 150-;
aggregate: 900-;
superfine aggregate: 50-100 parts;
water reducing agent: 8-12 parts;
defoaming agent: 0.5-2 parts;
a regulator: 2-6 parts;
setting accelerator: 0.05-0.5 part;
retarder: 2-8 parts.
Preferably, the cement is one of PO52.5 ordinary portland cement and PI 52.5 portland cement, and preferably, the PO52.5 ordinary portland cement comprises the following chemical components in percentage by weight: SiO 22：22.03、Al2O3：4.65、Fe2O3: 3.28, CaO: 66.93, MgO: 1.67, f-CaO: 0.89 percent and the ignition loss is less than or equal to 2.5 percent. Specific surface area of 360m2/kg。
Preferably, the silica fume comprises the following chemical components in percentage by weight: SiO 22：95.30％、Al2O3：0.17％、Fe2O3: 0.73%, CaO: 0.54%, MgO: 1.07 percent, and the balance of loss on ignition. The specific surface area is more than or equal to 23000m2/kg。
Preferably, the chemical components and weight percentage of the micro-beads are as follows: SiO 22：52％、Al2O3：22％、Fe2O3: 4%, CaO: 12% free CaO is less than 0.1 percent, and the loss on ignition is less than 1 percent. Sphere density 2.5kg/cm3The fineness d50 is less than or equal to 3 mu m.
Preferably, the fiber is one or more of steel fiber and PVA synthetic fiber, and the steel fiber can be at least one of wave-shaped steel fiber, end bending type steel fiber, micro copper plating wave-shaped steel fiber, micro copper plating end bending type steel fiber and micro copper plating linear type steel fiber.
Preferably, the aggregate is one or more of quartz sand and carborundum, and the maximum grain size of the sand is less than or equal to 2.5 mm.
Preferably, the superfine aggregate is at least one of 300-mesh quartz powder and 400-coarse whiting powder.
Preferably, the retarder is one or more of citric acid, boric acid and borax.
Preferably, the coagulant is one or more of lithium carbonate, aluminum sulfate and lithium sulfate.
Preferably, SiO of nano-ultrafine silica2The content is more than or equal to 99 percent, and the powder fineness is as follows: 1000 mesh, pH: 6.5-7.5, specific surface area: 220-230m2/g。
Preferably, the regulator is a swelling agent and a viscosity reducer, and the mass ratio is 2: 3; more preferably, the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide in a mass ratio of 2.8:0.5: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1.
The invention also relates to a preparation method of the ultra-high performance anti-abrasion concrete, which comprises the steps of weighing the raw materials in parts by weight, uniformly mixing the raw materials and packaging. When in use, water is added according to the requirement.
The invention also relates to the application of the ultra-high performance anti-abrasion concrete, which is particularly applied to the construction, repair and reinforcement of water conservancy concrete, is particularly suitable for the construction and repair of underwater engineering in a flow erosion environment, and can also be applied to other occasions needing structure repair.
The invention has the following advantages:
1. according to the invention, the compact packing density principle is utilized, the grain composition of the fine aggregate is reasonably optimized to achieve compact packing of the aggregate, the compact packing principle is also adopted on the cementing material for optimization design, a large amount of micro-bead, silica fume and other superfine mineral admixtures are filled, the grain composition reaches the state of the closest packing from the aggregate to the cementing material, all the components can be fully filled, the internal compactness of the material is ensured, and the ultrahigh strength is achieved.
2. The material uses the micro-beads, the micro-beads belong to a fine product of the fly ash, and the micro-beads have a volcanic ash effect, can be subjected to chemical reaction with alkaline substances such as calcium hydroxide and the like in a humid environment to generate gelled substances such as calcium silicate hydrate, calcium aluminate hydrate and the like, and play a role in enhancing the strength and blocking capillary channels, so that the anti-erosion capability is improved. And the micro-beads are used for filling fine aggregates in the material, and the ultra-fine micro-beads are equivalent to active nano-materials, so that the structural strength can be obviously improved, and the homogeneity and compactness of the material are improved. Because the microbeads are spherical particles with compact and smooth surfaces, the microbeads can play a certain role in dispersing cement particles, increase the lubricity of materials, reduce the viscosity of the materials, reduce the water consumption in mixtures, achieve the effect of physical water reduction, well reduce the water-cement ratio and enable UHPAC to have high fluidity, thereby achieving the excellent self-compacting effect. The micro-beads and the silica fume belong to high-activity admixtures, but the initial hydration speed still cannot meet the requirements of curing and mechanical properties in a flow erosion environment, the concrete is very easy to be dispersed by water flow before the effective strength is formed, and the concrete construction and engineering reinforcement are hindered.
3, the UHPAC adhesive material is large in usage amount, and the nanometer ultrafine silicon dioxide promotes hydration of the cementing material extremely quickly, so that the UHPAC is easy to shrink in the early stage to cause concrete cracking, the UHPAC can generate plastic expansion before the UHPAC is hardened by using an expanding agent in the UHPAC, the UHPAC can not shrink in the plastic stage and can generate micro expansion to keep the hardening stage, particularly when a mixture of sulphoaluminate clinker, gypsum and calcium oxide with the mass ratio of 2.8:0.5:1 is used as the expanding agent, the nanometer ultrafine silicon dioxide can also promote the formation of expansive ettringite in advance, and the UHPAC can not shrink to cause cracking. And the UHPAC mixture has extremely high viscosity due to large consumption of glue materials, nanometer superfine silicon dioxide newcastle viscous glue solution and extremely low water-to-glue ratio, the surface tension of the glue can be improved by adopting the chemical regulator viscosity reducer, the yield stress of the inorganic glue in limited free water is reduced, the UHPAC has good workability, and the balance of cohesiveness and fluidity is kept.
4. The product is a powder bagged finished product, and can be directly used by adding water in a construction site, so that the on-site construction progress is greatly improved. Uniformly adding the raw materials in the stirring process. The stirred material has extremely high fluidity, the in-situ pouring can achieve self-compaction, the construction can be carried out according to a common concrete construction mode in the whole construction process, conventional concrete stirring equipment is adopted, stirring is carried out without adding any special equipment, only the stirring time is controlled according to the liquefaction degree of UHPAC, special maintenance is not required after the pouring is finished, but the UHPC is an anisotropic material, is easily influenced by fiber distribution and orientation and has a size effect, so during the repair or construction of the anti-abrasion bottom plate, the pouring direction of the UHPC is required to be poured along the water flow direction of the bottom plate, and the UHPC is not easily brought out by water flow impact in order to prevent the steel fibers from being distributed disorderly.
5. The ultra-long construction property is realized, the one-hour expansion degree is more than 600mm, and the 6-hour expansion degree can reach more than 20MPa, so that the ultra-long construction method can be used for repairing parts of an emergency project, a good construction effect can be obtained by a simple construction mode and a maintenance mode, and the ultra-high performance concrete (UHPAC) has a huge application prospect in the aspect of water conservancy, but the ultra-long construction method is not only applied to the aspect of water conservancy erosion and abrasion resistance, and other projects needing repair and reinforcement can be repaired by the UHPAC.
Detailed Description
UHPAC is mixed by adopting a premix way, each bag of material weighs 20kg, the water-material ratio is stirred according to the proportion of 1:0.17, a horizontal forced mixer is used for stirring for five minutes, UHPAC fluidity test is carried out according to the relevant regulation of hydraulic concrete test regulation SL352-2006, compressive strength test is carried out according to the relevant regulation of hydraulic concrete test regulation SL352-2006, and a concrete test piece with the size of 100mm multiplied by 100mm is adopted for the test to carry out the compressive strength test. And carrying out underwater steel ball method abrasion resistance tests according to relevant regulations of SL352-2006 Hydraulic concrete test regulations and DL/T5150-2001 hydraulic concrete test regulations.
Example 1
The UHPAC comprises the following raw materials: 1000 parts of (A); microbeads: 110 parts of (A); silica fume: 90 parts of a mixture; nano ultra-fine silica: 4 parts of a mixture; fiber: 160 parts of (B); aggregate: 950 parts of; superfine aggregate: 80 parts of a mixture; water reducing agent: 11 parts of (1); defoaming agent: 0.5 part; a regulator: 5 parts of a mixture; setting accelerator: 0.5 part; retarder: 7 parts of cement, PO52.5 ordinary portland cement, fiber, micro copper-plated wave-shaped steel fiber, aggregate, quartz sand, superfine aggregate, 300-mesh quartz powder, boric acid as a retarder, lithium sulfate as a coagulant, an expanding agent and a viscosity reducer as a regulator, wherein the mass ratio of the expanding agent to the retarding agent is 2:3, and the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide in a mass ratio of 2.8:0.5: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1. The measured data are as follows: the initial expansion degree is 720mm, the one-hour expansion degree is 660mm, the 6h compressive strength is 25MPa, the 1d compressive strength is 90MPa, the 7d compressive strength is 109MPa, the 28d compressive strength is 134MPa, the 28d flexural strength is 20.9MPa, the 28d impact and abrasion strength is 52.16h/(kg/m2), and the appearance is crack-free.
Example 2
The UHPAC comprises the following raw materials: 800 parts; microbeads: 110 parts of (A); silica fume: 90 parts of a mixture; nano ultra-fine silica: 2 parts of (1); fiber: 165 parts of a mixture; aggregate: 900 parts; superfine aggregate: 100 parts of (A); water reducing agent: 9 parts of (1); defoaming agent: 1 part; a regulator: 4 parts of a mixture; setting accelerator: 0.3 part; retarder: 3 parts of cement, wherein the cement is one of P I52.5 portland cement, the fiber is micro copper-plated wave-shaped steel fiber, the aggregate is carborundum, the superfine aggregate is 400 heavy calcium powder, the retarder is citric acid, the coagulant is aluminum sulfate, the regulator is an expanding agent and a viscosity reducer, the mass ratio is 2:3, and the expanding agent is sulphoaluminate clinker, gypsum and calcium oxideA mixture with a mass ratio of 2.8:0.5: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1. The measured data are as follows: the initial expansion degree is 700mm, the one-hour expansion degree is 630mm, the 6h compressive strength is 24MPa, the 1d compressive strength is 87MPa, the 7d compressive strength is 108MPa, and the 28d compressive strength is 125 MPa. The 28d flexural strength is 19.1MPa, and the 28d abrasion strength is 49.83 h/(kg/m)2) And the appearance is crack-free.
Example 3
The UHPAC comprises the following raw materials: 900 parts; microbeads: 100 parts of (A); silica fume: 100 parts of (A); nano ultra-fine silica: 4 parts of a mixture; fiber: 160 parts of (B); aggregate: 950 parts of; superfine aggregate: 85 parts of a mixture; water reducing agent: 12 parts of (1); defoaming agent: 0.5 part; a regulator: 4 parts of a mixture; setting accelerator: 0.5 part; retarder: 6 parts of PO52.5 common portland cement as cement, micro copper-plated wave-shaped steel fiber as fiber, quartz sand as aggregate, 300-mesh quartz powder as superfine aggregate, boric acid as retarder, lithium sulfate as coagulant, an expanding agent and a viscosity reducer as regulator, wherein the mass ratio of the expanding agent to the retarding agent is 2:3, and the expanding agent is a nitroso-based plastic expanding agent; the viscosity reducer is a polycarboxylic acid viscosity reducer. The measured data are as follows: an initial extension of 6600mm, an one-hour extension of 600mm, a compressive strength of 20MPa at 6h, a compressive strength of 80MPa at 1d, a compressive strength of 98MPa at 7d, a compressive strength of 121MPa at 28d, a flexural strength of 18.6MPa at 28d, and an impact and abrasion strength of 44.21 h/(kg/m) at 28d2)。
Comparative example 1
The UHPAC comprises the following raw materials: 1000 parts of (A); microbeads: 110 parts of (A); silica fume: 90 parts of a mixture; fiber: 160 parts of (B); aggregate: 950 parts of; superfine aggregate: 80 parts of a mixture; water reducing agent: 11 parts of (1); defoaming agent: 0.5 part; a regulator: 5 parts of a mixture; setting accelerator: 0.5 part; retarder: 7 parts of cement, PO52.5 ordinary portland cement, fiber, micro copper-plated wave-shaped steel fiber, aggregate, quartz sand, superfine aggregate, 300-mesh quartz powder, boric acid as a retarder, lithium sulfate as a coagulant, an expanding agent and a viscosity reducer as a regulator, wherein the mass ratio of the expanding agent to the retarding agent is 2:3, and the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide in a mass ratio of 2.8:0.5: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1. The measured data are as follows: the initial expansion degree is 620mm, the one-hour expansion degree is 400mm, the compressive strength of 6h is 11MPa, the compressive strength of 1d is 40MPa, the compressive strength of 7d is 56MPa, the compressive strength of 28d is 62MPa, and the flexural strength of 28d is 6.5MPa, and the steel plate is cracked, isolated during underwater construction and cannot be constructed underwater.
Comparative example 2
The UHPAC comprises the following raw materials: 1000 parts of (A); fly ash: 110 parts of (A); mineral powder: 90 parts of a mixture; nano ultra-fine silica: 4 parts of a mixture; fiber: 160 parts of (B); aggregate: 950 parts of; superfine aggregate: 80 parts of a mixture; water reducing agent: 11 parts of (1); defoaming agent: 0.5 part; a regulator: 5 parts of a mixture; setting accelerator: 0.5 part; retarder: 7 parts of cement, PO52.5 ordinary portland cement, fiber, micro copper-plated wave-shaped steel fiber, aggregate, quartz sand, superfine aggregate, 300-mesh quartz powder, boric acid as a retarder, lithium sulfate as a coagulant, an expanding agent and a viscosity reducer as a regulator, wherein the mass ratio of the expanding agent to the retarding agent is 2:3, and the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide in a mass ratio of 2.8:0.5: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1. The measured data are as follows: the initial expansion degree is 680mm, the one-hour expansion degree is 500mm, the compressive strength is not high after 6 hours, the compressive strength at 1d is 52MPa, the compressive strength at 7d is 67MPa, the compressive strength at 28d is 71MPa, and the compressive strength at 28d is 6.2MPa, the crack is generated, the surface is scattered by running water in underwater construction, and the construction effect is poor.
Comparative example 3
The UHPAC comprises the following raw materials: 1000 parts of (A); microbeads: 110 parts of (A); silica fume: 90 parts of a mixture; nano ultra-fine silica: 4 parts of a mixture; fiber: 160 parts of (B); aggregate: 950 parts of; superfine aggregate: 80 parts of a mixture; water reducing agent: 11 parts of (1); defoaming agent: 0.5 part; setting accelerator: 0.5 part; retarder: 7 parts of cement, PO52.5 ordinary portland cement, fiber copper micro-plated wave-shaped steel fiber, aggregate of quartz sand, superfine aggregate of 300-mesh quartz powder, a retarder of boric acid, and a coagulant of lithium sulfate, wherein the measured data are as follows: the initial expansion degree is 520mm, the one-hour expansion degree is 480mm, the 6h compressive strength is 6MPa, the 1d compressive strength is 30MPa, the 7d compressive strength is 44MPa, the 28d compressive strength is 52MPa, and the 28d flexural strength is 8.9MPa, and the underwater construction fluidity and the construction effect are poor.
Comparative example 4
The UHPAC comprises the following raw materials: 1000 parts of (A); microbeads: 110 parts of (A); silica fume: 90 parts of a mixture; nano ultra-fine silica: 4 parts of a mixture; fiber: 160 parts of (B); aggregate: 950 parts of; superfine aggregate: 80 parts of a mixture; water reducing agent: 11 parts of (1); defoaming agent: 0.5 part; a regulator: 5 parts of a mixture; the cement is PO52.5 ordinary portland cement, the fiber is micro copper-plated wave-shaped steel fiber, the aggregate is quartz sand, the superfine aggregate is 300-mesh quartz powder, the retarder is boric acid, the coagulant is lithium sulfate, the regulator is an expanding agent and a viscosity reducer, the mass ratio is 2:3, and the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide, the mass ratio is 2.8:0.5: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1. The measured data are as follows: the initial expansion degree is 670mm, the one-hour expansion degree is 410, the solidification is not carried out for 6h, the 28d compressive strength is 96MPa, the underwater construction coagulation time is long, and the crack is generated.
Comparative example 5
The UHPAC comprises the following raw materials: 1000 parts of (A); microbeads: 110 parts of (A); silica fume: 90 parts of a mixture; nano ultra-fine silica: 0.5 part; fiber: 130 parts of (1); aggregate: 1150 parts; superfine aggregate: 120 parts of (A); water reducing agent: 13 parts; defoaming agent: 3 parts of a mixture; a regulator: 1 part; setting accelerator: 0.6 part; retarder: 6 parts of cement, namely PO52.5 ordinary portland cement, fiber, quartz sand, 300-mesh quartz powder as superfine aggregate, boric acid as retarder, lithium sulfate as coagulant, an expanding agent and a viscosity reducer as regulators, wherein the mass ratio of the expanding agent to the retarding agent is 2:1, and the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide in a mass ratio of 3:1: 1; the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1. The measured data are as follows: 750mm of initial expansion degree, bleeding, 570mm of one-hour expansion degree, large loss of fluidity, 15MPa of 6h compressive strength, 76MPa of 1d compressive strength, 86MPa of 7d compressive strength, 95MPa of 28d compressive strength, 14.6MPa of 28d flexural strength and 25.89 h/(kg/m) of 28d impact and abrasion strength2) And the concrete has poor cohesiveness, and underwater construction is dispersed on the surface by running water, so the construction effect is poor.
According to the results of the examples, the cement, the micro-beads and the silica fume are used as the cementing materials, the aggregate and the superfine aggregate are added to perfect the particle size distribution, the nanometer superfine silica, the fiber, the water reducing agent, the defoaming agent, the regulator, the coagulant and the retarder are added to serve as the functional auxiliary agents, and the ultra-high performance anti-abrasion concrete prepared by adjusting the mixture ratio of the raw materials can be used for building or repairing the part with the abrasion damage in the hydraulic building, wherein the expanding agent is a mixture of sulphoaluminate clinker, gypsum and calcium oxide in a mass ratio of 2.8:0.5:1, and the viscosity reducer is a mixture of a polycarboxylic acid viscosity reducer and polyacrylamide in a mass ratio of 3: 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The ultra-high performance anti-abrasion concrete is characterized by comprising the following raw materials in parts by weight:
cement: 800-1000 parts;
microbeads: 90-120 parts;
silica fume: 90-120 parts;
nano ultra-fine silica: 1-4 parts;
fiber: 150-;
aggregate: 900-;
superfine aggregate: 50-100 parts;
water reducing agent: 8-12 parts;
defoaming agent: 0.5-2 parts;
a regulator: 2-6 parts;
setting accelerator: 0.05-0.5 part;
retarder: 2-8 parts.
2. The ultra-high performance impact-resistant concrete according to claim 1, wherein the cement is one of PO52.5 portland cement, and pi 525 portland cement.
3. The ultra-high performance impact-resistant concrete according to claim 1, wherein the fibers are one or more of steel fibers and PVA synthetic fibers.
4. The ultra-high performance impact-resistant concrete according to claim 1, wherein the aggregate is one or more of quartz sand and silicon carbide sand, and the maximum grain size of the sand is less than or equal to 2.5 mm.
5. The ultra-high performance impact-resistant concrete according to claim 1, wherein the ultrafine aggregate is at least one of 300-mesh quartz powder and 400-coarse calcium powder.
6. The ultra-high performance impact-resistant concrete according to claim 1, wherein the retarder is one or more of citric acid, boric acid and borax.
7. The ultra-high performance impact-resistant concrete according to claim 1, wherein the accelerator is one or more of lithium carbonate, aluminum sulfate and lithium sulfate.
8. The ultra-high performance impact-resistant concrete according to claim 1, wherein the nano-ultrafine silica SiO is2The content is more than or equal to 99 percent, and the powder fineness is as follows: 1000 mesh, pH: 6.5-7.5, specific surface area: 220-230m2/g。
9. The ultra-high performance impact-resistant concrete according to claim 1, wherein the conditioning agent is an expanding agent and a viscosity reducing agent.
10. The use of the ultra-high performance abrasion-resistant concrete according to any one of claims 1 to 9, wherein the concrete is particularly applied to hydraulic concrete construction, repair and reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010043078.7A CN111233390A (en) | 2020-01-15 | 2020-01-15 | Ultrahigh-performance anti-abrasion concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010043078.7A CN111233390A (en) | 2020-01-15 | 2020-01-15 | Ultrahigh-performance anti-abrasion concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111233390A true CN111233390A (en) | 2020-06-05 |
Family
ID=70874675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010043078.7A Pending CN111233390A (en) | 2020-01-15 | 2020-01-15 | Ultrahigh-performance anti-abrasion concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111233390A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292291A (en) * | 2021-06-02 | 2021-08-24 | 华新超可隆新型建材科技(黄石)有限公司 | Low-cost low-shrinkage coarse aggregate UHPC suitable for cast-in-place and preparation process thereof |
| CN113372082A (en) * | 2021-07-16 | 2021-09-10 | 天津水泥工业设计研究院有限公司 | Wear-resistant ultra-high performance concrete and preparation method thereof |
| CN113831090A (en) * | 2021-11-01 | 2021-12-24 | 四川华西绿舍建材有限公司 | Large-flow-state anti-permeability anti-impact grinding hydraulic concrete and preparation method thereof |
| CN113912361A (en) * | 2020-07-09 | 2022-01-11 | 深圳立强材料科技有限公司 | Black steel fiber concrete |
| CN114230272A (en) * | 2021-12-10 | 2022-03-25 | 华南理工大学 | Anti-impact wear-resistant ultra-high performance concrete and application thereof |
| CN114477896A (en) * | 2022-01-17 | 2022-05-13 | 中国电建集团西北勘测设计研究院有限公司 | Ultrahigh-performance impact-resistant and wear-resistant concrete and preparation method thereof |
| CN114516743A (en) * | 2022-02-25 | 2022-05-20 | 华创建筑设计有限公司 | C100 multi-resin composite concrete prefabricated part and production process thereof |
| CN114538843A (en) * | 2022-01-17 | 2022-05-27 | 中国电建集团西北勘测设计研究院有限公司 | Low-energy-consumption ecological type ultrahigh-performance concrete and preparation method thereof |
| CN114644486A (en) * | 2022-03-03 | 2022-06-21 | 中电建路桥集团有限公司 | Bridge pier erosion wear resistant repair segment and preparation method thereof |
| CN116462467A (en) * | 2023-04-11 | 2023-07-21 | 浙江大东吴建筑科技有限公司 | Ultra-high performance concrete for decoration and preparation method thereof |
| CN117125945A (en) * | 2023-10-24 | 2023-11-28 | 上海建工集团股份有限公司 | Engineering repair material with low viscosity and high stability and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008297170A (en) * | 2007-06-01 | 2008-12-11 | Taiheiyo Material Kk | High strength repair material |
| CN102674770A (en) * | 2012-05-11 | 2012-09-19 | 中国水电顾问集团成都勘测设计研究院 | Anti-impact and wear-resistant mortar |
| CN103936347A (en) * | 2014-03-18 | 2014-07-23 | 上海罗洋新材料科技有限公司 | Ultra-high performance cement-based impact wear resistant material |
| CN105272005A (en) * | 2015-10-28 | 2016-01-27 | 上海罗洋新材料科技有限公司 | Ultrahigh-performance cement-based abrasion-resistant material |
| CN106278002A (en) * | 2015-06-10 | 2017-01-04 | 嘉华特种水泥股份有限公司 | A kind of concrete duct resistant abrasion mending mortar |
| CN109265096A (en) * | 2018-08-22 | 2019-01-25 | 武大巨成结构股份有限公司 | A kind of ultrahigh-performance cement-based resistant abrasion material |
| CN109704695A (en) * | 2019-03-01 | 2019-05-03 | 中建材中岩科技有限公司 | Cast-in-place Reactive Powder Concrete of early-strength and preparation method thereof |
-
2020
- 2020-01-15 CN CN202010043078.7A patent/CN111233390A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008297170A (en) * | 2007-06-01 | 2008-12-11 | Taiheiyo Material Kk | High strength repair material |
| CN102674770A (en) * | 2012-05-11 | 2012-09-19 | 中国水电顾问集团成都勘测设计研究院 | Anti-impact and wear-resistant mortar |
| CN103936347A (en) * | 2014-03-18 | 2014-07-23 | 上海罗洋新材料科技有限公司 | Ultra-high performance cement-based impact wear resistant material |
| CN106278002A (en) * | 2015-06-10 | 2017-01-04 | 嘉华特种水泥股份有限公司 | A kind of concrete duct resistant abrasion mending mortar |
| CN105272005A (en) * | 2015-10-28 | 2016-01-27 | 上海罗洋新材料科技有限公司 | Ultrahigh-performance cement-based abrasion-resistant material |
| CN109265096A (en) * | 2018-08-22 | 2019-01-25 | 武大巨成结构股份有限公司 | A kind of ultrahigh-performance cement-based resistant abrasion material |
| CN109704695A (en) * | 2019-03-01 | 2019-05-03 | 中建材中岩科技有限公司 | Cast-in-place Reactive Powder Concrete of early-strength and preparation method thereof |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912361A (en) * | 2020-07-09 | 2022-01-11 | 深圳立强材料科技有限公司 | Black steel fiber concrete |
| CN113292291A (en) * | 2021-06-02 | 2021-08-24 | 华新超可隆新型建材科技(黄石)有限公司 | Low-cost low-shrinkage coarse aggregate UHPC suitable for cast-in-place and preparation process thereof |
| CN113372082A (en) * | 2021-07-16 | 2021-09-10 | 天津水泥工业设计研究院有限公司 | Wear-resistant ultra-high performance concrete and preparation method thereof |
| CN113831090A (en) * | 2021-11-01 | 2021-12-24 | 四川华西绿舍建材有限公司 | Large-flow-state anti-permeability anti-impact grinding hydraulic concrete and preparation method thereof |
| CN114230272A (en) * | 2021-12-10 | 2022-03-25 | 华南理工大学 | Anti-impact wear-resistant ultra-high performance concrete and application thereof |
| CN114538843B (en) * | 2022-01-17 | 2023-01-13 | 中国电建集团西北勘测设计研究院有限公司 | Low-energy-consumption ecological type ultra-high-performance concrete and preparation method thereof |
| CN114477896A (en) * | 2022-01-17 | 2022-05-13 | 中国电建集团西北勘测设计研究院有限公司 | Ultrahigh-performance impact-resistant and wear-resistant concrete and preparation method thereof |
| CN114538843A (en) * | 2022-01-17 | 2022-05-27 | 中国电建集团西北勘测设计研究院有限公司 | Low-energy-consumption ecological type ultrahigh-performance concrete and preparation method thereof |
| CN114516743A (en) * | 2022-02-25 | 2022-05-20 | 华创建筑设计有限公司 | C100 multi-resin composite concrete prefabricated part and production process thereof |
| CN114516743B (en) * | 2022-02-25 | 2022-12-30 | 华创建筑设计有限公司 | C100 multi-resin composite concrete prefabricated part and production process thereof |
| CN114644486A (en) * | 2022-03-03 | 2022-06-21 | 中电建路桥集团有限公司 | Bridge pier erosion wear resistant repair segment and preparation method thereof |
| CN116462467A (en) * | 2023-04-11 | 2023-07-21 | 浙江大东吴建筑科技有限公司 | Ultra-high performance concrete for decoration and preparation method thereof |
| CN117125945A (en) * | 2023-10-24 | 2023-11-28 | 上海建工集团股份有限公司 | Engineering repair material with low viscosity and high stability and preparation method thereof |
| CN117125945B (en) * | 2023-10-24 | 2024-02-02 | 上海建工集团股份有限公司 | Engineering repair material with low viscosity and high stability and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111233390A (en) | Ultrahigh-performance anti-abrasion concrete | |
| CN108046712B (en) | High-strength low-resilience-rate sprayed concrete and construction process thereof | |
| Chithra et al. | The effect of Colloidal Nano-silica on workability, mechanical and durability properties of High Performance Concrete with Copper slag as partial fine aggregate | |
| CN108017345A (en) | A kind of ultrahigh-performance cement-based patching material and preparation method thereof | |
| CN113149530B (en) | Red mud modified foam light soil and preparation method and application thereof | |
| CN110218056B (en) | Strain hardening powder concrete, preparation method thereof and application thereof in bridge construction | |
| AU2021101949A4 (en) | A Kind of Green High Performance Concrete | |
| CN102666426B (en) | Comprise the hydraulic binder of ground blast furnace slag | |
| CN111116135A (en) | Early strength concrete with super-retarding effect and preparation process thereof | |
| CN110395949A (en) | A kind of heavy haul railway sleeper abrasion-proof concrete and preparation method thereof | |
| CN108424073A (en) | A kind of high abrasion high-strength concrete and preparation method thereof | |
| CN111574103A (en) | Multi-component composite synergist for sprayed concrete and preparation method thereof | |
| CN112079600A (en) | Self-compacting concrete for pumping | |
| Amin et al. | Properties and microstructure of high strength concrete incorporating different supplementary cementitious materials | |
| Wang et al. | Ultra-high performance concrete: Mix design, raw materials and curing regimes-A review | |
| CN111410489A (en) | High-strength self-compacting concrete and preparation method thereof | |
| CN110655365A (en) | High-strength concrete with iron ore as aggregate and preparation method thereof | |
| CN108546009B (en) | CaCO doped with multi-scale particle size3High performance concrete slurry admixture | |
| Li et al. | A study of high-performance slag-based composite admixtures | |
| Nazari et al. | RETRACTED: Optimization mechanical properties of Cr2O3 nanoparticle binary blended cementitious composite | |
| CN112919870A (en) | High-strength self-compacting concrete with recycled fine aggregate | |
| CN110590295B (en) | Steam-cured concrete for CRTS III type ballastless track slab and preparation method thereof | |
| CN110845200A (en) | Light high-strength thin-wall structure cast-in-place concrete | |
| CN106478018A (en) | A kind of ecological environment-friendly type nano cement based composites | |
| CN117209222A (en) | Preparation method of building 3D printing material |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200605 |