CN108640560A - A kind of high water absorbing capacity coarse aggregate concrete additive and its preparation method and application - Google Patents
A kind of high water absorbing capacity coarse aggregate concrete additive and its preparation method and application Download PDFInfo
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- CN108640560A CN108640560A CN201810617443.3A CN201810617443A CN108640560A CN 108640560 A CN108640560 A CN 108640560A CN 201810617443 A CN201810617443 A CN 201810617443A CN 108640560 A CN108640560 A CN 108640560A
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- coarse aggregate
- concrete
- absorbing capacity
- high water
- water absorbing
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Classifications
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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
- 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
- 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
-
- 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
- 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 present invention provides a kind of high water absorbing capacity coarse aggregate concrete additive, belongs to additives for building materials technical field.By mass percentage, including：Co-poly carboxylic acid 14%~21%, thinner 1%~3%, sodium gluconate 3%~5%, white sugar 1%~2%, antifoaming agent 0.01%~0.05%, preservative 0.04%~0.07%, water 69.88%~80.95%.The present invention also provides the preparation method and application of additive.When preparing high water absorbing capacity coarse aggregate concrete, compared to conventionally employed coarse aggregate of prewetting, improve folk prescription water consumption and the secondary mode for adding additive, it can be under conditions of not improving water consumption and prewetting coarse aggregate using additive of the present invention, obtain the good concrete of workability, and concrete work in 3 hours is functional, fully meet requirement of the construction to concrete performance so that concrete has the intensity and durability that homogeneity is good, viscosity is low, function of slump protection is good, concrete structural surface effect is good and can improve concrete structure.
Description
Technical field
The invention belongs to additives for building materials technical field, specially a kind of high water absorbing capacity coarse aggregate concrete is with additional
Agent and its preparation method and application.
Background technology
Concrete has become indispensable one of the important manufactured construction materials of modern architecture, worldwide
To being widely used.Concrete is mainly made of cementitious material, coarse aggregate, fine aggregate, additive and water, and coarse aggregate about occupies
The 40% of volume of concrete, thus the quality of coarse aggregate quality will directly affect the quality of concrete.Due to by geographical environment and
The influence of local raw material, regions of the world concrete raw material have the characteristics that its respectively.Current rubble for building is main
It is obtained by exploiting stone ore, but the condition that the geological structure of each department and rock generate is different from, and produces coarse aggregate parent rock
Material causes difference with regional disparity, at present China to concrete with coarse aggregate water absorption rate under normal circumstances be not more than 2%, but
Numerous torrid areas such as East Africa, Indonesia, since the difference of its parent rock causes coarse aggregate performance gap larger, coarse aggregate
Water absorption rate is most of more than 3%, is high water absorbing capacity aggregate, this is proposed the preparation of concrete and working performance holding new
It is required that.
Concrete is prepared for high water absorbing capacity coarse aggregate, it is most of at present additional using raising water consumption and secondary addition
Agent, this method often result in concrete strength and reduce and increase Cost of Concrete；Or the means such as prewetted using coarse aggregate, work
Make property retention dependent on the Pre-wetting degree of coarse aggregate and prewet mode, it is unstable that this also results in concrete quality, and thick bone
Material is prewetted and is limited by condition, little for some water shortages or high temperature area the practicality.It is perfect there is presently no one
Solution it is poor to improve the working performance that high temperature area high water absorbing capacity coarse aggregate concrete is faced, slump-loss is fast
Problem.
Invention content
The purpose of the present invention is to provide a kind of high water absorbing capacity coarse aggregate concrete additive and preparation method thereof and answer
With the additive, using the initialization performance that can improve concrete, makes to mix in high water absorbing capacity coarse aggregate concrete
The basic free of losses of solidifying soil slump 3h, the homogeneity for improving concrete, the durability for improving concrete.
The object of the invention is achieved through the following technical solutions：
A kind of high water absorbing capacity coarse aggregate concrete additive, by mass percentage, including following components：Polycarboxylic acids is total
Polymers 14%~21%, thinner 1%~3%, sodium gluconate 3%~5%, white sugar 1%~2%, antifoaming agent 0.01%~
0.05%, preservative 0.04%~0.07%, water 69.88%~80.95%.
Including following components further, by mass percentage,：Co-poly carboxylic acid 16%~19%, thinner 1.5%
~2%, sodium gluconate 3.5%~4%, white sugar 1%~2%, antifoaming agent 0.02%~0.04%, preservative 0.05%~
0.06%, water 72%~77%.
In additive of the present invention, co-poly carboxylic acid enters coarse aggregate as molecule polymeric monomer, by molecular migration effect
Capillary micropore in, delay absorption of the coarse aggregate to moisture using the hydrophobic group in co-poly carboxylic acid, make it have good
Function of slump protection and to the good conformability of material, not by the coarse aggregate or in the case of improve water consumption of prewetting, preparation
The initial workability of concrete is good, and function of slump protection is excellent.Thinner is adsorbed on cement granules week by the branched chain structure of itself
It encloses, forms thicker lubricant layer, by the viscosity for reducing the resistance drop low concrete between cement granules.Antifoaming agent passes through elimination
Fall deleterious bubbles larger in concrete, retains the micro-bubble beneficial to concrete, so as to improve the working performance of concrete,
Improve the density and durability of concrete.Preservative act as preventing additive rotten；Sodium gluconate and white sugar can be with
Delay Silicon in Cement acid tricalcium and the aquation of tricalcium aluminate, improve working performance of concrete gradual loss, ensures that concrete is good
Workability.
The amount ranges of co-poly carboxylic acid are limited to 14%~21% by the application, the main control for considering concrete quality
System, co-poly carboxylic acid ratio is excessive, causes concrete more sensitive to the volume of additive, and the variation of minimum dosage and material become
Change can all cause the larger quality of concrete to become words, if co-poly carboxylic acid ratio is too low, cause admixture dosage excessively high, unfavorable
In concrete Quality Control, when minor variations occur for raw material, needing larger additive to adjust amplitude can just ensure to mix
The quality of soil is coagulated, therefore excessive or too small co-poly carboxylic acid ratio is all unfavorable for the control of concrete quality, limits herein
Range mainly considers the quality control of concrete.
It is described poly- as an a kind of specific embodiment of high water absorbing capacity coarse aggregate concrete additive of the present invention
Polymers of carboxylic acid is isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer, allyl polyethenoxy ether-acrylic acid-horse
Come acid anhydrides -2- acrylamide-2-methyl propane sulfonics quadripolymer, methyl allyl alcohol polyoxyethylene ether-maleic anhydride-third
Olefin(e) acid terpolymer, one kind in methyl allyl alcohol polyoxyethylene ether-acrylic acid-hydroxy-ethyl acrylate terpolymer or
It is several.
Further, the co-poly carboxylic acid is isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer, allyl
Polyoxyethylene ether-acrylic acid-maleic anhydride -2- acrylamide-2-methyl propane sulfonics quadripolymer, methallyl alcohol are poly-
Ethylene oxide ether-maleic anhydride-acrylic ternary copolymer, methyl allyl alcohol polyoxyethylene ether-acrylic acid-acrylic acid hydroxyl second
The mixture that ester terpolymer is formed.
As an a kind of specific embodiment of high water absorbing capacity coarse aggregate concrete additive of the present invention, by quality
Percentages, the co-poly carboxylic acid include following components：Isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer 8%
~16%, allyl polyethenoxy ether-acrylic acid-maleic anhydride -2- acrylamide-2-methyl propane sulfonic quadripolymers
24%~32%, methyl allyl alcohol polyoxyethylene ether-maleic anhydride-acrylic ternary copolymer 12%~17%, methyl alkene
Propyl alcohol polyoxyethylene ether-acrylic acid-hydroxy-ethyl acrylate terpolymer 40%~56%, the sum of each component are 100%.
Further, by mass percentage, the co-poly carboxylic acid includes following components：Isobutene alcohol polyoxyethylene
Ether-acrylic acid bipolymer 10%~15%, allyl polyethenoxy ether-acrylic acid-maleic anhydride -2- acryloyls
Amine -2- methyl propane sulfonic acids quadripolymer 26%~30%, methyl allyl alcohol polyoxyethylene ether-maleic anhydride-acrylic acid three
Membered copolymer 14%~16%, methyl allyl alcohol polyoxyethylene ether-acrylic acid-hydroxy-ethyl acrylate terpolymer 45%~
50%, the sum of each component is 100%.
The mixture of the preferred above-mentioned four kinds of copolymers of the application co-poly carboxylic acid, and limit corresponding quality percentage
It is only capable of the aquation of cement being had an impact and kept the working performance of concrete than, common polycarboxylic acids diminishing or the guarantor mother liquor that collapses,
The working performance that high water absorbing capacity aggregate makes the absorption of moisture concrete cannot be prevented to be deteriorated, when co-poly carboxylic acid is preferably
The mixture of four kinds of copolymers can not only have an impact the aquation of cement, high water absorbing capacity aggregate can also be prevented to moisture
Absorption, to keep the working performance of concrete.
The preferred above-mentioned four kinds of copolymers of co-poly carboxylic acid of the present invention, can build commerical ready-mixed concrete Meishan green wood in
It is bought in material Co., Ltd product on sale.Wherein, the trade name of isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer
For poly-carboxylic high-performance water reducing type mother liquor；Allyl polyethenoxy ether-acrylic acid-maleic anhydride -2- acrylamide -2- first
The improved-type mother liquor of trade name poly-carboxylic high-performance workability of base propane sulfonic acid quadripolymer；Methallyl alcohol polyoxyethylene
The trade name poly-carboxylic high-performance of ether-maleic anhydride-acrylic ternary copolymer integrates aqueous mother liquor；Methallyl alcohol polyoxy
The trade name poly-carboxylic high-performance collapse protection type mother liquor of vinethene-acrylic acid-hydroxy-ethyl acrylate terpolymer.Certainly,
Those skilled in the art can also be commercially available according to the title of copolymer, be commercially available conventional products.
As an a kind of specific embodiment of high water absorbing capacity coarse aggregate concrete additive of the present invention, the drop
Stick is acrylic acid-acrylamide -2- acrylamide-2-methyl propane sulfonic terpolymers.Thinner of the present invention can
Directly to buy from the market.
It is described to disappear as an a kind of specific embodiment of high water absorbing capacity coarse aggregate concrete additive of the present invention
Infusion is one or both of polyethers antifoaming agent, organic silicon modified by polyether class antifoaming agent mixture.
It is described anti-as an a kind of specific embodiment of high water absorbing capacity coarse aggregate concrete additive of the present invention
Rotten agent is one or both of dodecyl benzyl dimethyl ammonium chloride or dodecyl guanidine hydrochloride.
A kind of preparation method of high water absorbing capacity coarse aggregate concrete additive, includes the following steps：
1) normal-temperature water of required quality is weighed, co-poly carboxylic acid is added, and is stirred at normal temperatures to get total to polycarboxylic acids
Copolymer solution.
2) thinner, sodium gluconate, white sugar, antifoaming agent and anti-corrosion are added into above-mentioned co-poly carboxylic acid solution
Agent, and stirring can be obtained high water absorbing capacity coarse aggregate concrete additive at normal temperatures.
As an a kind of specific reality of the preparation method of high water absorbing capacity coarse aggregate concrete additive of the present invention
Apply example, in step 1), mixing time is 5~10mi n under the room temperature；In step 2), under the room temperature mixing time be 20~
30mi n。
A kind of application of high water absorbing capacity coarse aggregate concrete additive, application of the additive in concrete.This
Invention additive should be first added additive when being applied in concrete in the water needed for concrete, and coagulation is added with water
Additive can be preferably allowed to be wrapped in around cement and aggregate in soil.
As an a kind of specific embodiment of the application of high water absorbing capacity coarse aggregate concrete additive of the present invention,
By mass percentage, the additive in concrete in application, volume be cementitious material gross mass 1.2%~1.7%.
The water absorption rate of coarse aggregate is different, and the absorption to additive can be caused different, can be adjusted by the content of co-poly carboxylic acid
The volume of additive, setting volume mainly consider that too low volume concrete mixes additive from concrete Quality Control angle
It measures too sensitive, is unfavorable for the quality control of concrete, because of the dosage that the small powder of additive limits, too high volume increases mixed
The adjustment amplitude for coagulating soil, should not adjust and influence concrete such as setting time, air content etc., it is unfavorable for the quality control of concrete
System.
Compared with prior art, the invention has the advantages that：
Additive component of the present invention can produce under normal temperature condition, and preparation process is simple.Prepare the thick bone of high water absorbing capacity
When expecting concrete, compared to conventionally employed coarse aggregate of prewetting, folk prescription water consumption and the secondary mode for adding additive are improved, is used
Additive of the present invention can obtain the good concrete of workability under conditions of not improving water consumption and prewetting coarse aggregate, and
Concrete work in 3 hours is functional, fully meets requirement of the construction to concrete performance so that concrete has homogeneity
Well, viscosity is low, function of slump protection is good, concrete structural surface effect is good and can improve the intensity and durability of concrete structure.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Each raw material of high water absorbing capacity coarse aggregate concrete additive described in Examples 1 to 6 and mass percent formula
As shown in table 1 below.
1 high water absorbing capacity coarse aggregate concrete of table is matched with additive Examples 1 to 4, compares ratio of additive (quality percentage
Than)
Above-mentioned high water absorbing capacity coarse aggregate concrete is as follows with additive preparation method：
1, each raw material are weighed by above-mentioned quality proportioning, normal-temperature water is firstly added, and co-poly carboxylic acid is added, in room temperature
Lower stirring 5~10 minutes, obtains co-poly carboxylic acid solution.
2, thinner, sodium gluconate, white sugar, antifoaming agent, anti-corrosion are added into the above-mentioned co-poly carboxylic acid being stirred
Agent stirs 20~30 minutes high water absorbing capacity coarse aggregate concrete additive can be obtained at normal temperatures.
High water absorbing capacity coarse aggregate C30 concrete is prepared using Examples 1 to 2, C30 concrete benchmark match ratios are cement：
II grade of flyash：River sand：High water absorbing capacity coarse aggregate：Water=260:70:850:1000:165 (quality proportionings).C30 concrete systems
When standby, first additive be dissolved in the water of quality needed for concrete, be added in concrete with water.
High water absorbing capacity coarse aggregate C50 concrete is prepared using embodiment 3~4, C50 concrete benchmark match ratios are cement：
II grade of flyash：River sand：High water absorbing capacity coarse aggregate：Water=340:80:800:1020:155 (quality proportionings).C50 concrete systems
When standby, first additive be dissolved in the water of quality needed for concrete, be added in concrete with water.
High water absorbing capacity coarse aggregate C30 concrete is prepared using embodiment 5~6, C30 concrete proportionings and preparation method are adopted together
The proportioning and method of high water absorbing capacity coarse aggregate C30 concrete are prepared with Examples 1 to 2.
High water absorbing capacity coarse aggregate C50 concrete is prepared using embodiment 5~6, C50 concrete proportionings and preparation method are adopted together
The proportioning and method of high water absorbing capacity coarse aggregate C50 concrete are prepared with embodiment 3~4.
Comparative example 1 and 2 additive of comparative example are that polycarboxylic admixture is sold in market, and finished product comparative example 1 and comparative example 2 are respectively
C30 concrete (concrete benchmark match ratio is identical as the Examples 1 to 2) performance of additive preparation is sold using market and C50 is mixed
Solidifying soil (concrete benchmark match ratio is identical as embodiment 3~4) performance.
Experiment is respectively 3.6% and 4.0% with the dry water absorption rate of saturation plane of C30 and C50 high water absorbing capacity coarse aggregates is prepared.System
The performance of standby obtained concrete is as shown in table 2 below.
2 concrete performance of table
From table 2 it can be seen that compared with comparative example 1, embodiment 5 and embodiment 6, prepared using embodiment 1 and embodiment 2
High water absorbing capacity coarse aggregate C30 concrete go out that machine working performance is good, and working performance holding capacity is more excellent, concrete viscosity closes
It is suitable, wrapping property is more excellent, high water absorbing capacity coarse aggregate C30 working performance of concrete damage prepared by comparative example 1, embodiment 5 and embodiment 6
Lose it is very fast, without working performance when 3h.Durability test shows embodiment 1 and embodiment 2 compared to comparative example 1,5 and of embodiment
Embodiment 6 has better endurance quality, has than 6 better compression strength of comparative example 1, embodiment 5 and embodiment, and have
Smaller dry contraction and better anti-permeability performance.
To high water absorbing capacity coarse aggregate C50 testing concrete performances, embodiment 3 and embodiment 4 are compared to comparative example 2, implementation
There is more excellent working performance, working performance to keep the basic frees of losses of 3h for example 5 and embodiment 6, and viscosity is smaller, and wrapping property is good
It is good, and comparative example 2, embodiment 5 and embodiment 6 pass through 3h gradual loss without work performance.In terms of durability, using embodiment 3
There is lower dry contraction compared to C50 concrete prepared by comparative example 2, embodiment 5 and embodiment 6 with embodiment 4, it is more excellent
Anti-permeability performance, and compression strength is more excellent.
Embodiment 5 and embodiment 6 are added to two of which or three kinds of co-poly carboxylic acids due to respectively referring to, in coagulation soil nature
Can not be compared with the embodiment 1 to 4 for adding four kinds of co-poly carboxylic acids on energy, but list gathers from embodiment 5 and embodiment 6 with commercially available
Carboxylic acid additive (comparative example 1 and comparative example 2) is compared, and concrete performance is relatively more excellent, and it is poly- cannot only to reach four kinds of addition
The performance of the embodiment 1 to 4 of polymers of carboxylic acid.This is possible as the specific active ingredient and sheet of commercially available polycarboxylic admixture
Apply for that the ingredient of co-poly carboxylic acid is different, although being all polycarboxylic acid, there are many kinds of polycarboxylic acids, is exactly not necessarily the application
In four kinds of co-poly carboxylic acids mentioning the effect of the present invention is not achieved so performance will be different.
Therefore, the present invention uses the high water absorbing capacity coarse aggregate special additive of four kinds of compound preparations of co-poly carboxylic acid can be with
It is obviously improved the working performance of concrete and with excellent function of slump protection, and the intensity and endurance quality of concrete can be improved,
Polycarboxylic admixture (comparative example 1, comparative example 2) is sold in market, and working performance holding capacity is poor, and endurance quality is poor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of high water absorbing capacity coarse aggregate concrete additive, which is characterized in that by mass percentage, including with the following group
Point：Co-poly carboxylic acid 14%~21%, thinner 1%~3%, sodium gluconate 3%~5%, white sugar 1%~2%, defoaming
Agent 0.01%~0.05%, preservative 0.04%~0.07%, water 69.88%~80.95%.
2. a kind of high water absorbing capacity coarse aggregate concrete additive as described in claim 1, which is characterized in that the polycarboxylic acids is total
Polymers is isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer, allyl polyethenoxy ether-acrylic acid-maleic acid
Acid anhydride -2- acrylamide-2-methyl propane sulfonics quadripolymer, methyl allyl alcohol polyoxyethylene ether-maleic anhydride-acrylic acid
One kind or several in terpolymer, methyl allyl alcohol polyoxyethylene ether-acrylic acid-hydroxy-ethyl acrylate terpolymer
Kind.
3. a kind of high water absorbing capacity coarse aggregate concrete additive as claimed in claim 2, which is characterized in that the polycarboxylic acids is total
Polymers is isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer, allyl polyethenoxy ether-acrylic acid-maleic acid
Acid anhydride -2- acrylamide-2-methyl propane sulfonics quadripolymer, methyl allyl alcohol polyoxyethylene ether-maleic anhydride-acrylic acid
The mixing that terpolymer, methyl allyl alcohol polyoxyethylene ether-acrylic acid-hydroxy-ethyl acrylate terpolymer are formed
Object.
4. a kind of high water absorbing capacity coarse aggregate concrete additive as claimed in claim 3, which is characterized in that by mass percentage
Meter, the co-poly carboxylic acid includes following components：Isobutene alcohol polyoxyethylene ether-acrylic acid bipolymer 8%~
16%, allyl polyethenoxy ether-acrylic acid-maleic anhydride -2- acrylamide-2-methyl propane sulfonic quadripolymers
24%~32%, methyl allyl alcohol polyoxyethylene ether-maleic anhydride-acrylic ternary copolymer 12%~17%, methyl alkene
Propyl alcohol polyoxyethylene ether-acrylic acid-hydroxy-ethyl acrylate terpolymer 40%~56%, the sum of each component are 100%.
5. a kind of high water absorbing capacity coarse aggregate concrete additive as described in claim 1, which is characterized in that the thinner is
Acrylic acid-acrylamide -2- acrylamide-2-methyl propane sulfonic terpolymers.
6. a kind of high water absorbing capacity coarse aggregate concrete additive as described in claim 1, which is characterized in that the antifoaming agent is
One or both of polyethers antifoaming agent, organic silicon modified by polyether class antifoaming agent mixture.
7. a kind of preparation method of high water absorbing capacity coarse aggregate concrete additive as described in claim 1, which is characterized in that packet
Include following steps：
1) it weighs the normal-temperature water of required quality, co-poly carboxylic acid is added, and stirred at normal temperatures to get to co-poly carboxylic acid
Solution.
2) thinner, sodium gluconate, white sugar, antifoaming agent and preservative are added into above-mentioned co-poly carboxylic acid solution, and
Stirring can be obtained high water absorbing capacity coarse aggregate concrete additive at normal temperatures.
8. a kind of preparation method of high water absorbing capacity coarse aggregate concrete additive as claimed in claim 7, which is characterized in that step
It is rapid 1) in, under the room temperature mixing time be 5~10min；In step 2), mixing time is 20~30min under the room temperature.
9. a kind of application of high water absorbing capacity coarse aggregate concrete additive as described in claim 1, which is characterized in that described outer
Add application of the agent in concrete.
10. a kind of application of high water absorbing capacity coarse aggregate concrete additive as claimed in claim 9, which is characterized in that press matter
Percentages are measured, the additive is in concrete in application, volume is the 1.2%~1.7% of cementitious material gross mass.
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| CN107512859A (en) * | 2017-09-20 | 2017-12-26 | 中国路桥工程有限责任公司 | A kind of anti-corrosion additive for big water absorption rate coarse aggregate concrete |
| CN108059381A (en) * | 2017-12-21 | 2018-05-22 | 武汉理工大学 | A kind of clear-water concrete chemical admixture and preparation method thereof |
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2018
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| US20070125273A1 (en) * | 2005-12-02 | 2007-06-07 | Decorative Concrete Supply, Inc. | Lightweight concrete mix and method of using same |
| CN101225148A (en) * | 2007-12-21 | 2008-07-23 | 北京工业大学 | Method for synthesizing allyl polyether-type high-performance water reducing agent |
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| CN108059381A (en) * | 2017-12-21 | 2018-05-22 | 武汉理工大学 | A kind of clear-water concrete chemical admixture and preparation method thereof |
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