CN101565284B - Multifunctional cement concrete reducing and anti-cracking curing agent - Google Patents
Multifunctional cement concrete reducing and anti-cracking curing agent Download PDFInfo
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- CN101565284B CN101565284B CN2009101039991A CN200910103999A CN101565284B CN 101565284 B CN101565284 B CN 101565284B CN 2009101039991 A CN2009101039991 A CN 2009101039991A CN 200910103999 A CN200910103999 A CN 200910103999A CN 101565284 B CN101565284 B CN 101565284B
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- concrete
- curing agent
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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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/56—Opacifiers
- C04B2103/58—Shrinkage reducing agents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a multifunctional cement concrete reducing and anti-cracking curing agent, relating to the functional curing agent and reducing agent in the cement concrete admixture. The multifunctional cement concrete reducing and anti-cracking curing agent is composed of reducing compound, penetrant aid, film forming material, film forming material aid and water. The multifunctional cement concrete reducing and anti-cracking curing agent has good reducing and anti-cracking function and obviously increases the early strength of the cement concrete and increases the late strength to some extent, less dosage, good economic return and prevents the compatibility problem with the other additive. The multifunctional cement concrete reducing and anti-cracking curing agent is widely used for pouring component of cement concrete, road-surface maintenance, wall maintenance, thin-walled member or the other work.
Description
Technical field
The invention belongs to the cement concrete technical field, relate to the functional type curing agent and the economization agent of cement concrete admixture.
Background technology
Concrete contraction and consequent cracking are chronic diseases of concrete engineering quality, also are the problems that academia and engineering circle are concerned about always.High performance concrete that development in recent years is got up (HPC) and high-strength concrete (HSC), be characterized in that water consumption is little, cement consumption is big, and mixed adulterant with reactive behavior, therefore premature gelation material aquation is very fast, cause the inside concrete free water to consume rapidly, at the closely knit self-desiccation that produces simultaneously of internal structure, concrete contraction and rimose possibility have been strengthened.Crack on concrete can be controlled and reduces by strengthening methods such as maintenance and admixture admixture, and is wherein comparatively effective with brushing curing agent and admixture economization agent for concrete.
Curing agent claims water-holding agent again, is the admixture that can reduce concrete or mortar dehydration.The maintenance of using curing agent is exactly by the concrete of maintenance or mortar surface sprinkling or brushing one deck filmogen, make concrete or mortar surface and air isolated. to prevent internal moisture evaporation on the coagulation, keep inside concrete humidity, reach the effect of long-term maintenance.Curing agent reduces the crackle that dehydration causes except require can water conservation, and also requirement can not reduce concrete strength, and other harmful effects.And the curing agent of existing concrete generally all only has the function of water conservation, prevents that the concrete cracking effect is very limited., publication number disclosed as on July 16th, 2008 is " a kind of curing compound " patent of CN101219867A, and disclosed is by benzene emulsion, acrylic acid amides solution, silicon sodium solution, organosilane solution composition, with its component mix stir evenly and finished product.The main drawback of this curing agent is: acts on singlely, only has water retention, and relatively poor to the concrete reinforced effects.
Economization agent is control and the admixture that reduces concrete shrinkage, though the use of existing concrete economization agent have significantly reduce, the cracking resistance effect, but exist volume big, the price height, concrete strength is caused disadvantageous effect, bad with the water reducer consistency, influence concrete coagulating time and shortcomings such as the concrete slump and air content.
Summary of the invention
The objective of the invention is deficiency, a kind of multifunctional cement concrete reducing and anti-cracking curing agent be provided at existing curing agent and economization agent, have simultaneously reduce, the function of water conservation, enhancing, cracking resistance, and it is little to have a consumption, characteristics such as cost is low.
Mechanism of the present invention: because concrete dry shrinkage mainly is that the residual water in the pore forms concave meniscus because pore water outwards scatters and disappears, the capillary hole wall is formed negative pressure, cause the contraction of pore, cement stone is produced shrink.Economization agent is a kind of tensio-active agent of water, its effect mainly shows the surface tension that can reduce water significantly, when economization agent is applied to concrete surface outward, the water that can infiltrate in concrete surface and the pore is had an effect, reduce the surface tension of pore water, reduce the negative pressure in the pore, reduce pore and shrink.It is feasible from reducing the mechanism angle that economization agent is coated with the concrete contraction of minimizing outward.The present invention is coated with technical thought outward based on curing compound and economization agent, introduces penetrant and makes economization agent infiltrate inside concrete as much as possible, by economization agent the reduction of concrete pore solution surface tension is reduced concrete contraction; Film forming principle according to curing agent is selected suitable membrane-forming agent and film coalescence aid, in the condition that has economization agent and economization agent penetrant to exist, in the even film forming of concrete surface, play the function of curing compound on the one hand, also prevent simultaneously the economization agent volatilization, guarantee that abundant economization agent infiltrates concrete.This invention from reduce, water conservation and enhancing three aspects improve concrete capacity against cracking simultaneously, with water conservation, reduce, effect such as enhancing and cracking resistance; Simultaneously economization agent is coated with outward, multiple working procedure such as curing agent spraying is integrated, it is simple to have a construction; To have an economization agent consumption little with respect to mixing in the economization agent, reduces use cost; Because outer being coated with adopted in this invention, with cement and other admixtures react possible little, avoided the compatibility problem of economization agent and cement, other admixtures preferably; Do not influence the aquation of cement and a good local hydrated environment is provided, not only do not reduce concrete intensity, the concrete strength that can also improve.
Help penetrant to make economization agent be penetrated into inside concrete as much as possible, make it reduce effect and not only rest on concrete surface, be deep into inside concrete as much as possible.
Film forming matter with help film forming matter to be based on the principle of curing compound; under the condition that economization agent exists; protective membrane in that concrete surface formation and concrete, economization agent have excellent compatibility plays water-preserving curing to concrete on the one hand, prevents the economization agent volatilization in addition on the one hand.
The technical scheme that realizes the object of the invention is: a kind of component of multifunctional cement concrete reducing and anti-cracking curing agent and weight percentage thereof are:
Reduce compound 30～50%
Help penetrant 2～5%
Film forming matter 10～20%
Help film forming matter 2～5%
Water 27～56%
Wherein: reduce compound and be polyacrylate economization agent (is that " polyacrylate is economization agent and preparation method thereof " patented method of ZL200510057130 is synthetic by the patent No.) or poly glycol monomethyl ether acrylate (commercial small molecules economization agent) or JM-SRA economization agent (commercially available prod); Helping penetrant is 2-Ethylhexyl Alcohol Soxylat A 25-7 (3) phosphoric acid ester or Diisobutylene maleic acid sodium salt; Film forming matter is vinylformic acid or water glass; Helping film forming matter is 12 carbon alcohol ester or butadiene-styrene latexes.
Curing agent of the present invention is said components to be mixed to stir evenly form, and the preparation method is simple, and is easy to use, easy to utilize.
After the present invention adopts technique scheme, mainly contain following characteristics:
1. has the performance that reduces contraction and cracking resistance preferably.Because cement concrete reducing and anti-cracking curing agent of the present invention is by reducing compound, help penetrant, film forming matter, helping film forming matter and water to form.Economization agent infiltrates through inside concrete under the effect of penetrant, reduce the surface tension of water in the inside concrete kapillary, reduces the concrete shrinkage purpose thereby reach; Film forming matter, to help the main effect of film forming matter be to form one deck water-retaining film, prevents the volatilization of moisture evaporation and economization agent, guarantees to have the economization agent of capacity to infiltrate through inside concrete and water water supply muddy waterization fully, reduces the concrete shrinkage that moisture evaporation causes; Water also provides aquation required water simultaneously mainly as the solvent of this functional type curing agent.Under the effect of above component, design a kind of have simultaneously reduce, the multifunctional concrete curing agent of water conservation, enhancing, cracking resistance.The key distinction on the function of product in other products be this product except that possessing basic care action, the more important thing is to have the function that reduces concrete shrinkage preferably, increases concrete strength, the while is improved concrete resistance to cleavage from many aspects like this
2. the remarkable concrete early strength of refinforced cement of energy also has certain reinforced effects to later strength.Because the present invention protects the moisture of inside concrete within reason lost emphatically, the curing agent of this invention forms the film that evenly has water-retentivity and has then guaranteed this performance.And in water conservation, a certain amount of economization agent of interpolation is coated with outside being used in curing agent, is the function that increases concrete strength and reduce concrete shrinkage in order to allow curing agent also have simultaneously in water conservation; The film that forms also helps to prevent the volatilization of economization agent.Economization agent be coated with outward but not in the purpose of mixing be to drop to minimum to concrete detrimentally affect economization agent.In practice of construction, in mix economization agent concrete intensity reduced, and have the different problem of adaptability of economization agent and cement.And the present invention has not only solved the adaptability problem of economization agent and cement, can significantly strengthen early age strength of concrete simultaneously, and late strength of concrete is also had certain reinforced effects.
3. consumption is few, and is good in economic efficiency.To build thickness is that the concrete wall surface of 100cm*100cm*20cm is an example, and the consumption of cement is about 80kg.In mix 2% (1.6kg) that economization agent is a cement consumption; And this curing agent consumption is only for about 200g, mixes 1/8 of economization agent in only being.Compare with the interior economization agent of mixing, with 1m
3Concrete is to mix economization agent in the example to make the concrete cost rise about 140 yuans, and this curing agent maintenance cost only is about 18 yuan.
4. avoided liking the compatibility problem of first admixture with other.Multifunctional concrete reducing and anti-cracking curing agent of the present invention is owing to be the outer test specimen surface that is applied to, but not in mix, reduced and test specimen and the catalytic probability of other admixtures, effectively avoided compatibility problem.
Cement concrete reducing and anti-cracking curing agent of the present invention can be widely used in: the cast member of cement concrete, and maintenance of surface, the body of wall maintenance is in the operations such as thin-wall member.
Embodiment:
Below in conjunction with embodiment, further specify the present invention.
Embodiment 1
A kind of component of multifunctional cement concrete reducing and anti-cracking curing agent and weight percentage thereof are:
Reduce compound 40%
Help penetrant 5%
Film forming matter 10%
Help film forming matter 2%
Water 43%
Wherein: reducing compound is the polyacrylate economization agent; Helping penetrant is Diisobutylene maleic acid sodium salt; Film forming matter is a vinylformic acid; Helping film forming matter is 12 carbon alcohol esters.
This curing agent is said components to be mixed to stir evenly form.
Embodiment 2
A kind of component of multifunctional cement concrete reducing and anti-cracking curing agent and weight percentage thereof are:
Reduce compound 50%
Help penetrant 3%
Film forming matter 5%
Help film forming matter 5%
Water 37%
Wherein: reducing compound is the polyacrylate economization agent; Helping penetrant is 2-Ethylhexyl Alcohol Soxylat A 25-7 (3) phosphoric acid ester; Film forming matter is a water glass; Helping film forming matter is butadiene-styrene latex.
Embodiment 3
A kind of component of multifunctional cement concrete reducing and anti-cracking curing agent and weight percentage thereof are:
Reduce compound 45%
Help penetrant 5%
Film forming matter 20%
Help film forming matter 3%
Water 27%
Wherein: reducing compound is the poly glycol monomethyl ether acrylate; Helping penetrant is 2-Ethylhexyl Alcohol Soxylat A 25-7 (3) phosphoric acid ester; Film forming matter is a vinylformic acid; Helping film forming matter is 12 carbon alcohol esters.
Embodiment 4
A kind of component of multifunctional cement concrete reducing and anti-cracking curing agent and weight percentage thereof are:
Reduce compound 30%
Help penetrant 2%
Film forming matter 10%
Help film forming matter 2%
Water 56%
Wherein: reducing compound is the JM-SRA economization agent; Helping penetrant is Diisobutylene maleic acid sodium salt; Film forming matter is a water glass; Helping film forming matter is butadiene-styrene latex.
Experimental result
With the cement concrete reducing and anti-cracking curing agent of embodiment 1-4, carry out the contrast experiment of concrete shrinkage, intensity and resistance to cleavage, experimental result is as follows:
1. carry out concrete shrinkage, reduce experiment, the results are shown in Table 1.
Each embodiment concrete shrinkage performance test result of table 1
Table 1 explanation, adopt concrete reducing and anti-cracking curing agent of the present invention can obviously reduce concrete early-age shrinkage, with 1 day and 3 days to reduce effect the most obvious, along with the growth of the age of concrete, the reduce effect of curing agent of the present invention on concrete decreases.Curing compound of the present invention is applied to concrete surface outward, reducing composition can infiltrate in the concrete surface pore, reduce the surface tension of pore solution, when concrete pore moisture loss, the pore negative pressure reduces, also improve the microstructure of top layer pore simultaneously, reduced the pore quantity that causes contraction, reduced concrete contraction; Filmogen forms the film that one deck prevents economization agent volatilization and moisture evaporation at concrete surface, has reduced concrete and has changed the string stress that produces because of interior humidity, thereby reduced concrete contraction.
2. carry out the concrete strength experiment, the results are shown in Table 2.
Each embodiment concrete strength experimental result of table 2
Table 2 explanation adopts concrete reducing and anti-cracking curing agent of the present invention can increase concrete tensile splitting strength and ultimate compression strength in the different length of times.Curing agent of the present invention is applied to concrete surface outward, reduces in the pore that composition infiltrates into concrete surface layer, improves concrete microtexture, makes the generation that has suppressed the inside concrete tiny crack, has increased concrete intensity; Simultaneously, filmogen has reduced the evaporation of concrete surface layer moisture, makes inside concrete humidity remain on a higher state for a long time, and hydrated cementitious is abundant, and concrete strength increases.
3. carry out the crack-resistant performance of concrete experiment, the results are shown in Table 3.
Each embodiment crack-resistant performance of concrete experimental result of table 3
Each embodiment crack-resistant performance of concrete experimental result of table 3
Concrete reducing and anti-cracking curing agent of the present invention is adopted in table 3 explanation, and concrete resistance to cleavage gets a promotion, and shows as initial cracking time and postpones, and the crack area reduces.Curing agent of the present invention is applied to concrete surface outward, reduce in the pore that composition infiltrates into concrete surface layer, reduced the surface tension of hole solution, the pore negative pressure that moisture loss is caused reduces, filmogen has prevented the additional issue of moisture simultaneously, the concrete surface rate-of-loss of coolant reduces like this, delay the concrete plastic crack generation, reduce concrete plastic cracking area.
Curing agent of the present invention is adopted in table 1-3 explanation, and it is respond well to reduce concrete contraction aspect in early days, can obviously strengthen early age strength of concrete, and later strength is had certain reinforced effects, and effect of prestressed is obvious.
Claims (4)
1. multifunctional cement concrete cracking resistance shrinkage reducing and curing agent is characterized in that its component and weight percentage thereof are:
Wherein: reducing compound is polyacrylate economization agent or poly glycol monomethyl ether acrylate; Helping penetrant is 2-Ethylhexyl Alcohol Soxylat A 25-7 (3) phosphoric acid ester or Diisobutylene maleic acid sodium salt; Film forming matter is vinylformic acid or water glass; Helping film forming matter is 12 carbon alcohol ester or butadiene-styrene latexes.
2. according to the described multifunctional cement concrete cracking resistance of claim 1 shrinkage reducing and curing agent, it is characterized in that its component and weight percentage thereof are:
Wherein: reducing compound is the polyacrylate economization agent; Helping penetrant is Diisobutylene maleic acid sodium salt; Film forming matter is a vinylformic acid; Helping film forming matter is 12 carbon alcohol esters.
3. multifunctional cement concrete cracking resistance shrinkage reducing and curing agent is characterized in that its component and weight percentage thereof are:
Wherein: reducing compound is the polyacrylate economization agent; Helping penetrant is 2-Ethylhexyl Alcohol Soxylat A 25-7 (3) phosphoric acid ester; Film forming matter is a water glass; Helping film forming matter is butadiene-styrene latex.
4. according to the described multifunctional cement concrete cracking resistance of claim 1 shrinkage reducing and curing agent, it is characterized in that its component and weight percentage thereof are:
Wherein: reducing compound is the poly glycol monomethyl ether acrylate; Helping penetrant is 2-Ethylhexyl Alcohol Soxylat A 25-7 (3) phosphoric acid ester; Film forming matter is a vinylformic acid; Helping film forming matter is 12 carbon alcohol esters.
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| CN2009101039991A CN101565284B (en) | 2009-06-03 | 2009-06-03 | Multifunctional cement concrete reducing and anti-cracking curing agent |
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| CN2009101039991A CN101565284B (en) | 2009-06-03 | 2009-06-03 | Multifunctional cement concrete reducing and anti-cracking curing agent |
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| CN101565284B true CN101565284B (en) | 2011-11-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767370B (en) * | 2010-02-02 | 2012-05-02 | 重庆大学 | Cement concrete curing method |
| CN103321120A (en) * | 2012-03-17 | 2013-09-25 | 刘祖学 | Moisture-retaining pavement |
| CN105294161B (en) * | 2015-12-07 | 2018-10-16 | 江西洪屏抽水蓄能有限公司 | A kind of unsaturated siloxane base phosphate lotion curing compound and preparation method thereof |
| CN106186794B (en) * | 2016-07-04 | 2018-08-17 | 中交四航工程研究院有限公司 | A kind of high-effective concrete anti-cracking curing agent, preparation method and application |
| CN107572859B (en) * | 2017-08-31 | 2019-11-15 | 广东汇强外加剂有限公司 | A kind of regeneration concrete economization agent and preparation method thereof |
| CN108017319A (en) * | 2017-12-30 | 2018-05-11 | 胡果青 | A kind of special economization agent of concrete mortar |
| CN111724951B (en) * | 2020-06-28 | 2021-12-03 | 三瑞科技(江西)有限公司 | Production process of toughened glass insulator |
| CN111724950A (en) * | 2020-06-28 | 2020-09-29 | 三瑞科技(江西)有限公司 | Maintenance process of glass insulator |
| CN112456853A (en) * | 2020-12-16 | 2021-03-09 | 湖南加美乐素新材料股份有限公司 | High-strength alkali-free liquid accelerator and preparation method thereof |
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|---|---|---|---|---|
| CN1583648A (en) * | 2004-05-28 | 2005-02-23 | 哈尔滨工业大学 | Concrete reducing agent |
| CN1702087A (en) * | 2005-06-21 | 2005-11-30 | 重庆大学 | Polyacrylic acid salts shrinkage-reducing-agent and method for making same |
| CN101182156A (en) * | 2007-11-15 | 2008-05-21 | 水利部交通部电力工业部南京水利科学研究院 | Decrement reinforcing type polycarboxylic acid series high-performance dehydragent and method for making same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583648A (en) * | 2004-05-28 | 2005-02-23 | 哈尔滨工业大学 | Concrete reducing agent |
| CN1702087A (en) * | 2005-06-21 | 2005-11-30 | 重庆大学 | Polyacrylic acid salts shrinkage-reducing-agent and method for making same |
| CN101182156A (en) * | 2007-11-15 | 2008-05-21 | 水利部交通部电力工业部南京水利科学研究院 | Decrement reinforcing type polycarboxylic acid series high-performance dehydragent and method for making same |
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