CN110272250A - A kind of high fluidity cement concrete configuration method - Google Patents

A kind of high fluidity cement concrete configuration method Download PDF

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CN110272250A
CN110272250A CN201910587853.2A CN201910587853A CN110272250A CN 110272250 A CN110272250 A CN 110272250A CN 201910587853 A CN201910587853 A CN 201910587853A CN 110272250 A CN110272250 A CN 110272250A
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concrete
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盖彦龙
吕忠华
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    • 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
    • C04B28/06—Aluminous cements
    • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/29—Frost-thaw resistance
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The present invention provides a kind of high fluidity cement concrete configuration method, include the following steps: that a. according to the amount of each ready-mixed concrete, requires to prepare raw material according to match ratio；B. fine sand, medium coarse sand, miberal powder, hollow glass micropearl and gypsum are packed into forced mixer, start forced mixer；C. investment concrete fiber, dry mixing 30-40 seconds；D. 70% water is added, and compound additive is added and stirs 20-30 seconds；E. whole sulphate aluminium cements is put into, after stirring 60 seconds, the water of addition remaining 30% is stirred, and final mixing time is t；F. grab sample after the completion of stirring, if concrete fiber is evenly dispersed at monofilament, then concrete can come into operation.Extend mixing time 20-30 seconds if still having bunched fiber, that is, can be used.This method can effectively improve the mobility of the cement concrete, and ensure that crushing resistance, impermeability and frost resistance.

Description

A kind of high fluidity cement concrete configuration method
Technical field
The present invention relates to building material technical fields, and in particular to a kind of high fluidity cement concrete configuration method.
Background technique
The construction material that concrete is big as dosage in the world, use scope is wide, good mechanical property, economy with And extensive development has been obtained in various countries and area to the adaptability of environment, with the development of society, property of the people to building More stringent requirements are proposed for energy.Concrete structure is as the most common structure type of field of civil engineering, construction and military service ring Border is extremely complex, and the endurance issues of concrete are especially prominent in adverse circumstances, it has also become domestic and international research hotspot.Its intensity and Impervious water resistance is an important factor for influencing concrete durability.Its intensity of concrete currently on the market and water resistance are not very Ideal, durability is poor, is not able to satisfy the needs of people's high request.
Normal concrete refers to using cement as major gelled material, and water, sand, stone, mix when necessary chemical admixture and Mineral admixture is cooperated by proper proportion, by artificial stone made of uniform stirring, closely knit molding and maintenance hardening.Coagulation Soil is mainly divided into two stages and state: condensing presclerotic mecystasis, i.e. fresh concrete or concrete mix；Firmly Hardened condition after change, i.e. maturing or concrete, but the fold resistance of normal concrete, impact resistance are poor, and It is more demanding to construction organization coordination, it must be used as early as possible after the completion of stirring.
And fluidity concrete is that fluidizing reagent (a kind of high-effect water-reducing agent) is added in a kind of be transported to after scene with mixer truck, Through secondary agitation, it is readily flowed, be not easy the high slump concrete isolated.The characteristics of this concrete is good fluidity, is suitable for Pumping is able to maintain the superperformance of dry stiff concrete and does not increase the water consumption of original concrete, is only to improve concrete Workability, with it is abundant meet modernization construction requirement.This concrete be suitable for it is various it is large-scale, novel, section is complicated, steel The intensive building of muscle by the way of centralized production, convenient for control quality, high production efficiency convenient for construction, can be shortened the duration, Cost is reduced, high flowing concrete has better construction workability, and 10h flexural strength is higher than 4MPa, and compression strength is up to 30MPa, while also there is better volume stability, the durability index such as impervious and frost resistance are also significantly better than common coagulation Soil.It is therefore desirable to provide a kind of high fluidity cement concrete to meet the requirements at the higher level of modern architecture.
Summary of the invention
In consideration of it, the invention proposes a kind of configuration methods of high fluidity cement concrete, it is intended to solve common coagulation Native crushing resistance, impermeability and frost resistance are poor, and coordinate more demanding problem to construction organization.
The invention proposes a kind of configuration methods of high fluidity cement concrete, include the following steps:
A. according to the amount of each ready-mixed concrete, require to prepare raw material according to match ratio, including sulphate aluminium cement, thin Sand, medium coarse sand, miberal powder, hollow glass micropearl, gypsum, graphene oxide, water, concrete fiber and compound additive；
B. fine sand, medium coarse sand, miberal powder, hollow glass micropearl, gypsum and graphene oxide are packed into forced mixer, opened Dynamic forced mixer；
C. investment concrete fiber, dry mixing 30-40 seconds；
D. 70% water is added, and compound additive is added and stirs 20-30 seconds；
E. whole sulphate aluminium cements is put into, after stirring 60 seconds, the water of addition remaining 30% is stirred, final to stir Time is t；
F. grab sample after the completion of stirring, if concrete fiber is evenly dispersed at monofilament, then concrete can come into operation. Extend mixing time 20-30 seconds if still having bunched fiber, that is, can be used；
Compound additive described in above-mentioned steps a, the compound additive is VAE lotion, water-reducing agent, air entraining agent are gentle Solidifying agent is by being formulated: where the water-reducing agent is carbonyl coke aldehyde；The air entraining agent is sodium alkyl benzene sulfonate；It is described Retarder be methyl orthophosphoric acid；
The preparation method of the compound additive is as follows:
Sodium citrate is mixed with water, 38 DEG C of stirring 15min is heated to and obtains sodium citrate solution, be added propylene glycol and VAE lotion is warming up to 85 DEG C, ultrasonic vibration 5-8min；After above-mentioned mixed liquor is cooled to room temperature, alkylbenzene is added in ice-water bath Sodium sulfonate, ultrasonic vibration 1min；Then methyl orthophosphoric acid is added, 60 DEG C are warming up under the protection of nitrogen, hydrogen peroxide, ultrasound is added 3-5min is vibrated, pH value is adjusted to neutrality and obtains the compound additive.
Wherein, propylene glycol and VAE lotion, the ultrasonic vibration after being warming up to 85 DEG C is added in the first stage in sodium citrate solution Frequency is f1,
In formula, f1Indicate that propylene glycol and VAE lotion, the ultrasonic vibration frequency after being warming up to 85 DEG C is added in the first stage；T1Table Show the mixeding liquid temperature of first stage；T10Indicate the preset temperature value of first stage, temperature value is 80 DEG C；g1Indicate the first stage The quality of propylene glycol and VAE lotion, G is added10The gross mass of current mixed liquor；The specific heat capacity of n expression sodium citrate solution；f10 It indicates first stage preset vibration frequency, is 55kHz.
Wherein sodium alkyl benzene sulfonate is added in second stage, and ultrasonic vibration frequency is f2
In formula, f2Indicate the ultrasonic vibration frequency that second stage is added after sodium alkyl benzene sulfonate；f1Indicate the first stage Preset vibration frequency；T2Indicate the mixeding liquid temperature of second stage；T20Indicate the preset temperature value of second stage, temperature value is 26℃；The specific heat capacity of n expression sodium citrate solution；f20It indicates the preset vibration frequency of second stage, is 30kHz.
Wherein, methyl orthophosphoric acid is added in the phase III, and 60 DEG C are warming up under the protection of nitrogen, and hydrogen peroxide, ultrasound vibration is added Dynamic frequency is
In formula, f3Indicate that the ultrasonic vibration frequency after sodium alkyl benzene sulfonate is added in phase III addition；f30Indicate third rank The preset vibration frequency of section, is 25kHz；g3Indicate that the quality of methyl orthophosphoric acid, G is added in the phase III3Indicate phase III mixing The gross mass of liquid, n indicate the specific heat capacity of sodium citrate solution.
In above-mentioned steps e, the water of addition remaining 30% is stirred, and final mixing time is according to following formula (1) It determines:
In formula, t indicates final mixing time；T4The temperature of concrete when indicating that remaining 30% water is added；T40It indicates Preset temperature value, value are 40 DEG C；The revolving speed of c expression forced mixer；M indicates the weight of sulphate aluminium cement in concrete Amount；M indicates the total weight of solids added in concrete；V indicates correction factor, and the value of v is 0.82.
Further, the high fluidity cement concrete that the high fluidity cement concrete configuration method is configured, packet Include the component of following parts by weight:
500-600 parts of sulphate aluminium cement；300-400 parts of fine sand；250-300 parts of medium coarse sand；100-120 parts of miberal powder；It is empty 75-85 parts of heart glass microballoon；50-80 parts of gypsum；15-25 parts of graphene oxide；22-31 parts of additive, including: water-reducing agent 8-10 parts；5-8 parts of air entraining agent；4-6 parts of retarder；5-7 parts of VAE lotion；It further include 260-320 parts of water and concrete fiber 0.6-1.2 parts.
Further, the high fluidity cement concrete that the high fluidity cement concrete configuration method is configured, packet Include the component of following parts by weight:
530 parts of sulphate aluminium cement；320 parts of fine sand；280 parts of medium coarse sand；100 parts of miberal powder；78 parts of hollow glass micropearl；Stone 60 parts of cream；9 parts of water-reducing agent；5 parts of air entraining agent；4 parts of retarder；VAE lotion 5；260 parts of water；0.6 part of concrete fiber.
Further, the granularity of above-mentioned hollow glass micropearl is 10-250 microns, 1-2 microns of wall thickness.
Further, above-mentioned water-reducing agent is carbonyl coke aldehyde.
Further, above-mentioned air entraining agent be rosin tree lipid, alkyl and alkylated aromatic sulfonic acid class, fatty alcohol sulfonate class, One or more of saponins and protein salt, petroleum sulphur hydrochloric acid.
Further, above-mentioned retarder is one or more of organic phosphate or borate.
Further, above-mentioned concrete fiber is polypropylene fibre, is the filamentary fibers that length is 2-5 centimetres.
Compared with prior art, the beneficial effects of the present invention are high fluidity cement concrete provided by the invention Configuration method is that overcoming cement slurry using this method production concrete is difficult to the defect that sandstone substantially uniformity is wrapped up, from And achieve the purpose that increase concrete strength or save cement, and enhance the mobility of cement, can preferably it reach Construction requirement, while can have the effect of slow setting, more times are provided for work progress.
Especially, it is added in high fluidity cement concrete configuration method of the present invention by the compound of special compounding Additive can work respectively in the different phase of concrete grout aquation, or play a role jointly within the same time, realize Multi-functional, multi-effect purpose.
Further, for the pH value of the sodium citrate solution 8 or so, the preparation for the compound additive provides alkalinity Environment, propylene glycol and VAE lotion since VAE lotion has certain adhesive, and have characteristic resistant to high temperature, therefore right The mixed liquor of first stage carries out being warming up to 85 DEG C, and carries out ultrasonic vibration, and as the temperature increases, vibration frequency is gradually increased To highest frequency, so that VAE lotion is sufficiently merged with other ingredients, alkane is added in above-mentioned mixed liquor in ice-water bath in second stage Base benzene sulfonic acid sodium salt avoids its too quick decomposition, methyl orthophosphoric acid is added in second stage, 60 DEG C is warming up under the protection of nitrogen, nitrogen The chemical property of gas is stablized, nontoxic, and nitrogen, which is added, can completely cut off the oxygen in air and the hair of the substance in the mixed liquor Biochemical reaction, ultrasonic vibration frequency ultimately form stable, efficient composite additive for concrete to minimum, have enhancing Frost resistance, the impermeability of concrete extend the setting time of concrete, and can enhance the mobility of concrete.
Also, in the configuration method of high fluidity cement concrete of the invention, using sulphate aluminium cement, have compared with High early strength, and it still is able to that there is preferable workability under subzero environment, and use aluminium sulfate water The concrete of mud configuration also has excellent freeze proof, impervious, erosion-resisting performance, and during stirring, sulfate cement is certainly Body can effectively consistent alkali-aggregate reaction, avoid concrete structure expansion, the phenomenon that cracking even destroys.
Concrete fiber can efficiently control micro- caused by the factors such as concrete/mortar plastic shrinkage, drying shrinkage, temperature change Crackle prevents and inhibits the formation and development of concrete pre-existing fracture, substantially improve concrete/mortar waterproofing and anti-leakage performance, Scour & wear resistance energy, increases the toughness of concrete, to improve the service life of concrete.
Graphene oxide has biggish specific surface area, contains a large amount of oxygen-containing functional group on lamella, can be in diminishing The concrete particle for having dispersed this under the action of agent is agglomerated into a large amount of loosely organized, lesser recombination flocculation knots of size again Structure generates active influence to later period concrete mortar hardening phase, increases the intensity of concrete product.
Oxygen-containing functional group in graphene oxide can't play chemical reaction in concrete, therefore in the construction process It will not accelerate the aquation of concrete, the sufficient time is provided for construction personnel.
The addition of graphene oxide increases the quantity of gel pore and pore in concrete grout, and lamella is to part Pore can play the role of mixing for closing blocking, effective anti-permeability performance for promoting concrete product, also, graphene oxide Suitable oxidation is added for normal concrete in the flexural strength and compression strength for entering to effectively improve concrete product The flexural strength of the concrete of graphene can at least promote 30%, meanwhile, graphene oxide is to the crystal hydrogen-oxygen in concrete Changing calcium has refining effect, can be improved the homogeneity of concrete product, in concrete product destructive process, graphene oxide sheet Layer can also generate certain inhibition to the formation and extension of concrete product inside microcrack in destructive process, greatly promote The durability of concrete product.Water-reducing agent uses carbonyl coke aldehyde, be hydrophobic group main chain is aliphatic hydrocarbon, is a kind of green height Imitate water-reducing agent.It is free from environmental pollution, do not damage human health.It is wide to cement applicability, the slump obvious to concrete reinforcing effect Lose small, low temperature is without sulfate crystal phenomenon.
Retarder can be effectively reduced hydrated cementitious speed and the heat of hydration, extend setting time.
VAE lotion can effectively prevent the cracking of concrete product, at the same be able to ascend concrete product impact resistance, Acid resistance prolongs the service life.
Specific embodiment
Below with reference to specific embodiment, the technical scheme of the present invention will be further described, but claimed range is simultaneously It is not limited to this.
The embodiment of the present invention provides a kind of configuration method of high fluidity cement concrete, includes the following steps:
A. according to the amount of each ready-mixed concrete, require to prepare raw material according to match ratio, including sulphate aluminium cement, thin Sand, medium coarse sand, miberal powder, hollow glass micropearl, gypsum, graphene oxide, water, concrete fiber and compound additive；
B. fine sand, medium coarse sand, miberal powder, hollow glass micropearl, gypsum and graphene oxide are packed into forced mixer, opened Dynamic forced mixer；
C. investment concrete fiber, dry mixing 30-40 seconds；
D. 70% water is added, and compound additive is added and stirs 20-30 seconds；
E. whole sulphate aluminium cements is put into, after stirring 60 seconds, the water of addition remaining 30% is stirred, final to stir Time is t；
F. grab sample after the completion of stirring, as concrete fiber is evenly dispersed, at monofilament, then concrete can come into operation, Extend mixing time 20-30 seconds if still having bunched fiber, that is, can be used；
Compound additive described in above-mentioned steps a, the compound additive is VAE lotion, water-reducing agent, air entraining agent are gentle Solidifying agent is by being formulated: where the water-reducing agent is carbonyl coke aldehyde；The air entraining agent is sodium alkyl benzene sulfonate；It is described Retarder be methyl orthophosphoric acid；
The preparation method of the compound additive is as follows:
Sodium citrate is mixed with water, 38 DEG C of stirring 15min is heated to and obtains sodium citrate solution, be added propylene glycol and VAE lotion is warming up to 85 DEG C, ultrasonic vibration 5-8min；After above-mentioned mixed liquor is cooled to room temperature, alkylbenzene is added in ice-water bath Sodium sulfonate, ultrasonic vibration 1min；Then methyl orthophosphoric acid is added, 60 DEG C are warming up under the protection of nitrogen, hydrogen peroxide, ultrasound is added 3-5min is vibrated, pH value is adjusted to neutrality and obtains the compound additive.
Wherein, propylene glycol and VAE lotion, the ultrasonic vibration after being warming up to 85 DEG C is added in the first stage in sodium citrate solution Frequency is f1,
In formula, f1Indicate that propylene glycol and VAE lotion, the ultrasonic vibration frequency after being warming up to 85 DEG C is added in the first stage；T1Table Show the mixeding liquid temperature of first stage；T10Indicate the preset temperature value of first stage, temperature value is 80 DEG C；g1Indicate the first stage The quality of propylene glycol and VAE lotion, G is added10The gross mass of current mixed liquor；The specific heat capacity of n expression sodium citrate solution；f10 It indicates first stage preset vibration frequency, is 55kHz.
Wherein sodium alkyl benzene sulfonate is added in second stage, and ultrasonic vibration frequency is f2
In formula, f2Indicate the ultrasonic vibration frequency that second stage is added after sodium alkyl benzene sulfonate；f1Indicate the first stage Preset vibration frequency；T2Indicate the mixeding liquid temperature of second stage；T20Indicate the preset temperature value of second stage, temperature value is 26℃；The specific heat capacity of n expression sodium citrate solution；f20It indicates the preset vibration frequency of second stage, is 30kHz.
Wherein, methyl orthophosphoric acid is added in the phase III, and 60 DEG C are warming up under the protection of nitrogen, and hydrogen peroxide, ultrasound vibration is added Dynamic frequency is
In formula, f3Indicate that the ultrasonic vibration frequency after sodium alkyl benzene sulfonate is added in phase III addition；f30Indicate third rank The preset vibration frequency of section, is 25kHz；g3Indicate that the quality of methyl orthophosphoric acid, G is added in the phase III3Indicate phase III mixing The gross mass of liquid, n indicate the specific heat capacity of sodium citrate solution.
In above-mentioned steps e, the water of addition remaining 30% is stirred, and final mixing time is according to following formula (1) It determines:
In formula, t indicates final mixing time；T4The temperature of concrete when indicating that remaining 30% water is added；T40It indicates Preset temperature value, value are 40 DEG C；The revolving speed of c expression forced mixer；M indicates the weight of sulphate aluminium cement in concrete Amount；M indicates the total weight of solids added in concrete；V indicates correction factor, and the value of v is 0.82.
Compound additive described in the embodiment of the present invention can work respectively in the different phase of concrete grout aquation, or It plays a role jointly within the same time, realizes multi-functional, multi-effect purpose.Also, above-mentioned high fluidity cement concrete Configuration method in, the granularity of the hollow glass micropearl is 10-250 microns, 1-2 microns of wall thickness, is led with light, low The advantages that hot, higher intensity, good chemical stability, and water absorption rate is low, can effectively reduce with water, while can protect Card concrete is subjected between anxious heat and chilling condition thermal shock caused by alternately variation, enhances the rigidity of concrete.
In the configuration method of above-mentioned high fluidity cement concrete, the VAE lotion can effectively prevent concrete product Cracking, while being able to ascend the impact resistance of concrete product, acid resistance, be able to extend service life.
In the configuration method of above-mentioned high fluidity cement concrete, the water-reducing agent is carbonyl coke aldehyde, is hydrophobic group main chain It is a kind of green high-efficient water-reducing agent for aliphatic hydrocarbon.It is free from environmental pollution, do not damage human health.It is wide to cement applicability, it is right Concrete reinforcing effect is obvious, little loss of slump, and low temperature is added after concrete mix without sulfate crystal phenomenon to cement Particle has peptizaiton, can reduce unit consumption of water, and diminishing amount can also improve concrete mix in 8%-10% Mobility.
In the configuration method of above-mentioned high fluidity cement concrete, the air entraining agent is rosin tree lipid, alkyl and alkyl One or more of arene-sulfonic acids class, fatty alcohol sulfonate class, saponins and protein salt, petroleum sulphur hydrochloric acid, can Improve the workability of concrete mix, water-retaining property and cohesiveness, concrete flowability is improved, in mixing and stirring for concrete mix Introducing is a large amount of equally distributed in the process, is closed and stable micro-bubble, can effectively improve the freeze proof, impervious of concrete Property.
In the configuration method of above-mentioned high fluidity cement concrete, the retarder is in organic phosphate or borate One or more, the retarder can postpone hydrated reaction of cement, to extend the setting time of concrete, make newly to mix coagulation The native long period keeps plasticity, facilitates casting, improves construction efficiency, while not will cause to later concrete properties bad It influences.
In the configuration method of above-mentioned high fluidity cement concrete, concrete fiber described in above-mentioned steps a is poly- third Alkene fiber is the filamentary fibers that length is 2-5 centimetres, and the concrete fiber can efficiently control concrete/mortar plasticity Micro-crack caused by the factors such as contraction, drying shrinkage, temperature change prevents and inhibits the formation and development of concrete pre-existing fracture, greatly The big waterproofing and anti-leakage performance for improving concrete/mortar, scour & wear resistance energy, increase the toughness of concrete, to improve concrete Service life.
Embodiment one
High fluidity cement concrete in the present embodiment, comprises the following components in parts by weight: sulphate aluminium cement 500 Part；300 parts of fine sand；250 parts of medium coarse sand；100 parts of miberal powder；15 parts of graphene oxide；75 parts of hollow glass micropearl；50 parts of gypsum； 22 parts of additive, including: 8 parts of water-reducing agent；5 parts of air entraining agent；4 parts of retarder；5 parts of VAE lotion；Further include 260 parts of water with And 0.6 part of concrete fiber.
Embodiment two
High fluidity cement concrete in the present embodiment, comprises the following components in parts by weight: sulphate aluminium cement 600 Part；400 parts of fine sand；300 parts of medium coarse sand；120 parts of miberal powder；25 parts of graphene oxide；85 parts of hollow glass micropearl；80 parts of gypsum； 31 parts of additive, including: 10 parts of water-reducing agent；8 parts of air entraining agent；6 parts of retarder；7 parts of VAE lotion；Further include 320 parts of water with And 1.2 parts of concrete fiber.
Embodiment three
High fluidity cement concrete in the present embodiment, comprises the following components in parts by weight: sulphate aluminium cement 530 Part；320 parts of fine sand；280 parts of medium coarse sand；100 parts of miberal powder；18 parts of graphene oxide；78 parts of hollow glass micropearl；60 parts of gypsum； 19 parts of additive, including: 9 parts of water-reducing agent；5 parts of air entraining agent；6 parts of retarder；6 parts of VAE lotion；Further include 320 parts of water with And 1.2 parts of concrete fiber.
Example IV
High fluidity cement concrete in the present embodiment, comprises the following components in parts by weight: sulphate aluminium cement 550 Part；330 parts of fine sand；260 parts of medium coarse sand；120 parts of miberal powder；23 parts of graphene oxide；81 parts of hollow glass micropearl；50 parts of gypsum； 20 parts of additive, including: 9 parts of water-reducing agent；6 parts of air entraining agent；5 parts of retarder；5 parts of VAE lotion；Further include 270 parts of water with And 0.8 part of concrete fiber.
Embodiment five
High fluidity cement concrete in the present embodiment, comprises the following components in parts by weight: sulphate aluminium cement 580 Part；370 parts of fine sand；280 parts of medium coarse sand；110 parts of miberal powder；19 parts of graphene oxide；83 parts of hollow glass micropearl；55 parts of gypsum； 18 parts of additive, including: 8 parts of water-reducing agent；7 parts of air entraining agent；5 parts of retarder；7 parts of VAE lotion；Further include 290 parts of water with And 1.1 parts of concrete fiber.
The high fluidity cement concrete of the various embodiments described above configuration, detects its slump respectively under same standard conditions Degree, compression strength, seepage-resistant grade and freeze proof grade, testing result are as shown in the table:
Obviously, high fluidity cement concrete configuration method provided by the invention, by changing solid material and additive Content, can effectively enhance the mobility of concrete, and improve the compression strength, impervious etc. of concrete to a certain extent Grade and freeze proof grade.Wherein, the content of hollow glass micropearl is affected to mobility, in practical applications, if desired compared with The concrete of high fluidity can then improve the content of hollow glass micropearl in appropriate range, otherwise reduce.
In the configuration method of above-mentioned high fluidity cement concrete, the concrete of production overcomes cement slurry and is difficult to a sandstone The defect of substantially uniformity package to achieve the purpose that increase concrete strength or save cement, and enhances cement Mobility can preferably reach construction requirement, while can have the effect of slow setting, when providing more for work progress Between.
Through the invention the method configuration high fluidity cement concrete compared with normal concrete for, various aspects of performance It greatly promotes, can satisfy modernization construction and higher construction requirement.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (8)

1. a kind of configuration method of high fluidity cement concrete, which comprises the steps of:
A. according to the amount of each ready-mixed concrete, require to prepare raw material according to match ratio, including sulphate aluminium cement, fine sand, in Coarse sand, miberal powder, hollow glass micropearl, gypsum, graphene oxide, water, concrete fiber and compound additive；
B. fine sand, medium coarse sand, miberal powder, hollow glass micropearl, gypsum and graphene oxide are packed into forced mixer, starting is strong Standard blender；
C. investment concrete fiber, dry mixing 30-40 seconds；
D. 70% water is added, and compound additive is added and stirs 20-30 seconds；
E. whole sulphate aluminium cements is put into, after stirring 60 seconds, the water of addition remaining 30% is stirred, final mixing time For t；
F. grab sample after the completion of stirring, if concrete fiber is evenly dispersed at monofilament, then concrete can come into operation；If Still there is bunched fiber then to extend mixing time 20-30 seconds, that is, can be used；
Compound additive described in above-mentioned steps a, the compound additive are VAE lotion, water-reducing agent, air entraining agent and retarder By being formulated: where the water-reducing agent is carbonyl coke aldehyde；The air entraining agent is sodium alkyl benzene sulfonate；Described is slow Solidifying agent is methyl orthophosphoric acid；
The preparation method of the compound additive is as follows:
Sodium citrate is mixed with water, 38 DEG C of stirring 15min is heated to and obtains sodium citrate solution, propylene glycol and VAE cream is added Liquid is warming up to 85 DEG C, ultrasonic vibration 5-8min；After above-mentioned mixed liquor is cooled to room temperature, alkyl benzene sulphonate is added in ice-water bath Sodium, ultrasonic vibration 1min；Then methyl orthophosphoric acid is added, 60 DEG C are warming up under the protection of nitrogen, hydrogen peroxide, ultrasonic vibration is added 3-5min adjusts pH value to neutrality and obtains the compound additive；
Wherein, propylene glycol and VAE lotion, the ultrasonic vibration frequency after being warming up to 85 DEG C is added in the first stage in sodium citrate solution For f1,
In formula, f1Indicate that propylene glycol and VAE lotion, the ultrasonic vibration frequency after being warming up to 85 DEG C is added in the first stage；T1Indicate the The mixeding liquid temperature in one stage；T10Indicate the preset temperature value of first stage, temperature value is 80 DEG C；g1Indicate that the first stage is added The quality of propylene glycol and VAE lotion, G10The gross mass of current mixed liquor；The specific heat capacity of n expression sodium citrate solution；f10It indicates First stage preset vibration frequency, is 55kHz；
Wherein sodium alkyl benzene sulfonate is added in second stage, and ultrasonic vibration frequency is f2
In formula, f2Indicate the ultrasonic vibration frequency that second stage is added after sodium alkyl benzene sulfonate；f1Indicate that the first stage is default Vibration frequency；T2Indicate the mixeding liquid temperature of second stage；T20Indicate the preset temperature value of second stage, temperature value 26 ℃；The specific heat capacity of n expression sodium citrate solution；f20It indicates the preset vibration frequency of second stage, is 30kHz；
Wherein, methyl orthophosphoric acid is added in the phase III, and 60 DEG C are warming up under the protection of nitrogen, and hydrogen peroxide, ultrasonic vibration frequency is added Rate is
In formula, f3Indicate that the ultrasonic vibration frequency after sodium alkyl benzene sulfonate is added in phase III addition；f30Indicate that the phase III is pre- If vibration frequency, be 25kHz；g3Indicate that the quality of methyl orthophosphoric acid, G is added in the phase III3Indicate phase III mixed liquor Gross mass, n indicate the specific heat capacity of sodium citrate solution.In above-mentioned steps e, the water of addition remaining 30% is stirred, finally Mixing time according to following formula (1) determine:
In formula, t indicates final mixing time；T4The temperature of concrete when indicating that remaining 30% water is added；T40Indicate default Temperature value, value are 40 DEG C；The revolving speed of c expression forced mixer；M indicates the weight of sulphate aluminium cement in concrete；M table Show the total weight of solids added in concrete；V indicates correction factor, and the value of v is 0.82.
2. the configuration method of high fluidity cement concrete according to claim 1, which is characterized in that the high fluidity The high fluidity cement concrete that cement concrete configuration method is configured, comprises the following components in parts by weight:
500-600 parts of sulphate aluminium cement；300-400 parts of fine sand；250-300 parts of medium coarse sand；100-120 parts of miberal powder；Aoxidize stone Black alkene 15-25 parts；75-85 parts of hollow glass micropearl；50-80 parts of gypsum；22-31 parts of additive, including: water-reducing agent 8-10 Part；5-8 parts of air entraining agent；4-6 parts of retarder；5-7 parts of VAE lotion, further include 260-320 parts of water and concrete fiber 0.6- 1.2 part.
3. the configuration method of high fluidity cement concrete according to claim 2, which is characterized in that the high fluidity The high fluidity cement concrete that cement concrete configuration method is configured, comprises the following components in parts by weight:
530 parts of sulphate aluminium cement, 320 parts of fine sand, 280 parts of medium coarse sand, 100 parts of miberal powder, 18 parts of graphene oxide, hollow glass 78 parts of microballon, 60 parts of gypsum, 9 parts of water-reducing agent, 5 parts of air entraining agent, 4 parts of retarder, 5-7 parts of VAE lotion, 260 parts of water, concrete is fine 0.6 part of dimension.
4. the configuration method of high fluidity cement concrete according to claim 1, which is characterized in that in the step a The granularity of the hollow glass micropearl is 10-250 microns, 1-2 microns of wall thickness.
5. the configuration method of high fluidity cement concrete according to claim 1, which is characterized in that in the step a The water-reducing agent is carbonyl coke aldehyde.
6. the configuration method of high fluidity cement concrete according to claim 1, which is characterized in that in the step a The air entraining agent is rosin tree lipid, alkyl and alkylated aromatic sulfonic acid class, fatty alcohol sulfonate class, saponins and protein One or more of salt, petroleum sulphur hydrochloric acid.
7. the configuration method of high fluidity cement concrete according to claim 1, which is characterized in that in the step a The retarder is one or more of organic phosphate or borate.
8. the configuration method of high fluidity cement concrete according to claim 1, which is characterized in that in the step a The concrete fiber is polypropylene fibre, is the filamentary fibers that length is 2-5 centimetres.
CN201910587853.2A 2019-07-02 2019-07-02 A kind of high fluidity cement concrete configuration method Pending CN110272250A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63273689A (en) * 1987-05-01 1988-11-10 Tokyo Electric Power Co Inc:The Impregnation of grout
CN103265254A (en) * 2013-05-09 2013-08-28 西安理工大学 Cement-based composite material used for engineering emergency maintenance, and preparation method and use method thereof
CN109678439A (en) * 2019-02-25 2019-04-26 内蒙古高等级公路建设开发有限责任公司 A kind of high fluidity cement concrete and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63273689A (en) * 1987-05-01 1988-11-10 Tokyo Electric Power Co Inc:The Impregnation of grout
CN103265254A (en) * 2013-05-09 2013-08-28 西安理工大学 Cement-based composite material used for engineering emergency maintenance, and preparation method and use method thereof
CN109678439A (en) * 2019-02-25 2019-04-26 内蒙古高等级公路建设开发有限责任公司 A kind of high fluidity cement concrete and preparation method thereof

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Application publication date: 20190924