CN104497211A - Efficient concrete thickener and preparation method thereof - Google Patents
Efficient concrete thickener and preparation method thereof Download PDFInfo
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- CN104497211A CN104497211A CN201410715358.2A CN201410715358A CN104497211A CN 104497211 A CN104497211 A CN 104497211A CN 201410715358 A CN201410715358 A CN 201410715358A CN 104497211 A CN104497211 A CN 104497211A
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Abstract
The invention provides an efficient concrete thickener which can effectively improve the consistency of concrete and cannot reduce the fluidity of concrete and a preparation method thereof. The efficient concrete thickener is prepared by mixing the following components in percentage by weight: 80-90wt% of polymer having ring structures and containing fatty alcohol branched chains, 2-8wt% of acrylic monomer, 2-8wt% of phenylpropadiene, 1.0-2.0wt% of an oxidant, 0.5-1.0wt% of a stabilizer and 0.3-0.5wt% of a chain transfer agent. By applying the thickener in cement concrete, the workability of concrete can be significantly improved and the coating property and pumpability of concrete are increased and meanwhile, the interference to a water reducer cannot be caused. The preparation method has the advantages of simple process, no dropwise adding process, no need of heating and short reaction period and can be widely used in various concrete as an auxiliary material.
Description
Technical field
The invention belongs to cement concrete material field, be specifically related to high-effective concrete thickening material and preparation method thereof.
Background technology
In recent years, China economic total volume leap to second place of the world, this wherein, the part pulled by capital construction occupies sizable share.Capital construction fully under way also brings the huge consumption of materials, such as cement, sandstone etc., and this causes the resources reserve of some areas to present the state that there is a serious shortage in the supply.Therefore, how to utilize the resource inferior such as building waste the like waste, mining mine tailing, namely utilization of waste as resource becomes the main path alleviating this problem.But the concrete workability that is utilized as in a large number of resource inferior brings series of problems, and as workability is bad, the phenomenons such as segregation, bleeding, have a strong impact on duration and construction quality.Analyze from mechanism, the viscosity deficiency of concrete slurry is the basic reason causing workability, parcel property bad.
For the problem of concrete workability, parcel property (slump), conventional terms of settlement has following several:
(1) retardant is added, as the retardant such as white sugar, maltodextrin;
(2) ionic or nonionic thickener is added, as polyacrylamide, the water-sol etc.;
(3) molecular weight of thickening material is adjusted;
(4) add air entrapment agent, improve the water-retentivity of system.
Although above-mentioned several method can solve the problem of concrete slurry viscosity in a way, all come with some shortcomings part, as retardant white sugar adds too much, easily causes concrete coagulating time abnormal; The consumption of thickening material is improper, easily causes slurry viscosity much, poor fluidity; Adjustment molecular weight likely can cause sterically hindered increase again, and workability declines; Add air entrapment agent and may cause the problems such as intensity reduction.In addition, when aggregate grading is bad, particularly during employment mechanism sand, the concrete workability of mixing is poor, easily occurs the phenomenons such as segregation, bleeding, affect construction quality in pumping procedure, and therefore such scheme is difficult to solve Practical Project problem.
Thickening material is a kind of auxiliary agent, is widely used in the aspects such as coating, printing, chemical building material.Existing polyurethane thickener, the polyoxyethylene glycol of screening is dropped in four-hole boiling flask carry out vacuum decompression processed, qualified rear logical nitrogen to be drained off carries out driving oxygen process, add catalyzer fully to stir evenly, the inertia solution of vulcabond is dripped at suitable temperature, base polyurethane prepolymer for use as is generated by high molecular free radical solution polymerization, add chainextender after prepolymer reaction and carry out chain-extension polymerization, and then add end-capping reagent and carry out hydrophobically modified, to be polymerizedly to react completely, free isocyanate content is lower than indication range, reduce pressure inert solvent carrying out precipitation treatment, obtain thickening material.The hydrophobically modified polyurethane associative thickener prepared by this method, compared with external analogous products, cuts still Shortcomings part in thickening properties, stream changes, gloss, consistency, color developing, aberration and heat storage stability energy etc. high, medium and low.
At present, the efficient thickeners in cement concrete field very lacks.And the high workability of modern concrete is badly in need of superior performance, adaptability thickening material widely, to meet the needs of modern project.But, also do not have at present a kind of adaptability extensively, compatible strong, technique is simple, the thickening material of excellent performance, for promoting concrete workability.
Summary of the invention
Technical problem to be solved by this invention provides a kind of effectively to improve concrete consistence and high-effective concrete thickening material not reducing its mobility and preparation method thereof for above-mentioned prior art.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of high-effective concrete thickening material, is mixed by following component, and described component and content are:
Ring structure polymkeric substance 80 ~ 90wt%, the Acrylic Acid Monomer 2 ~ 8wt% of fatty alcohol side chain, phenylpropyl alcohol diene 2 ~ 8wt%, oxygenant 1.0 ~ 2.0wt%, stablizer 0.5 ~ 1.0wt%, chain-transfer agent 0.3 ~ 0.5wt%;
Wherein, the chemical formula of the ring structure polymkeric substance of fatty alcohol side chain is
or
n=2-10, R1 are-(CH
2)
moH, m=1-5.
By such scheme, the weight-average molecular weight of high-effective concrete thickening material is 10
4-10
5.2.
By such scheme, oxygenant is hydrogen peroxide or hypochlorite.
By such scheme, stablizer is xitix or riboflavin.
By such scheme, chain-transfer agent is mercaptoethanol or Thiovanic acid.
The preparation method of described high-effective concrete thickening material, includes following steps:
One, ring structure polymkeric substance 80 ~ 90wt%, the Acrylic Acid Monomer 2 ~ 8wt% of fatty alcohol side chain, phenylpropyl alcohol diene 2 ~ 8wt%, oxygenant 1.0 ~ 2.0wt%, stablizer 0.5 ~ 1.0wt%, chain-transfer agent 0.3 ~ 0.5wt% is chosen;
Two, in the water-bath of 50-60 DEG C, the ring structure polymkeric substance of fatty alcohol side chain, Acrylic Acid Monomer are added together and stir and carries out esterification, then add phenylpropyl alcohol diene and oxygenant, stir and obtain homogeneous solution;
Three, in step 2 gained homogeneous solution, disposablely add stablizer and chain-transfer agent mixture, and continue to stir 3-4 hour, regulate pH be neutrality, add deionized water, obtain high-effective concrete thickening material.
Concrete consistence and cement slurry viscosity closely related, the high-effective concrete thickening material weight-average molecular weight prepared by the present invention is 10
4-10
5.2, containing ester group, ring structure in its backbone structure, side chain can contain polyethylene oxide base.Wherein high polymer main chain can improve system liquid phase viscosity, and ester group can discharge small molecule alcohol under the alkaline environment of hydrated cementitious, effectively can reduce surface tension, thus reduces the resistance of motion between particle and particle, has good lubrication; Ester group decomposition can generate carboxyl, absorption and cement particle surface, increases bonding force between particle and particle; The steric hindrance that ring structure, polyethylene oxide base are stronger, can increase the distance between particle and particle, be conducive to water molecules and enter particle voids, avoids particle agglomeration thus reduces friction resistance; Polyethylene oxide base has stronger wetting ability, adsorbable a large amount of water molecules, strengthens the water retention capacity of system.
The chemical name of chitin (Chitin) is (1-4)-2-ethanamide-2-deoxidation-β-D-Glucose, it is present in many lower animals, particularly among arthropodan shell, be also present in the cell walls of lower plant (as fungi, algae).The abundant raw material source of chitin, preparation is simple, all has a wide range of applications in fields such as weaving, printing and dyeing, papermaking, food, medicine and water treatments.The ring structure that the present invention uses is the derivative of chitin, and it, as the macromolecular chain medium existed between cement granules and particle, makes cement granules be interconnected, thus improves slurry viscosity.
Thickening material high polymer main chain prepared by the present invention is adsorbed in cement particle surface, main chain and side chain all have stronger hydrophilic interaction simultaneously, lubricated granules surface on the one hand, its mobility is provided, hydrogen bond is formed on the other hand with water molecules, there is good water-retentivity, significantly can improve the workability of fresh concrete, improve its pump-conveying property.
The present invention compares with technique with like product, has following main advantage:
1. thickening material of the present invention is used for, in cement concrete, significantly to improve concrete workability, improves its parcel property, increases pumpability; Interference can not be caused to water reducer simultaneously.
2. the present invention is according to molecular design theory, and adjustment backbone molecule structure amount and side-chain structure, realize the adjustability of thickening material performance;
3. the preparation technology of the present invention technique that is is simple, and without the process of dropping, without the need to heating, reaction time is short, can be used as the various concrete of subsidiary material widespread use.
Embodiment
The following examples 1-3 is further describing technical solution of the present invention.
The proportioning of embodiment 1-3 is as shown in table 1, and specific implementation process is as follows:
One, ring structure polymkeric substance, Acrylic Acid Monomer, phenylpropyl alcohol diene, oxygenant, stablizer, the chain-transfer agent of fatty alcohol side chain is chosen;
Two, in the water-bath of 50-60 DEG C, the ring structure polymkeric substance of fatty alcohol side chain, Acrylic Acid Monomer are added together and stir and carries out esterification, then add phenylpropyl alcohol diene and oxygenant, stir and obtain homogeneous solution;
Three, in step 2 gained homogeneous solution, disposablely add stablizer and chain-transfer agent mixture, and continue to stir 3-4 hour, regulate pH be neutrality, add deionized water, obtain high-effective concrete thickening material.
Described oxygenant is hydrogen peroxide or hypochlorite;
Described stablizer is xitix or riboflavin;
Described chain-transfer agent is mercaptoethanol or Thiovanic acid;
Table 1 embodiment raw material ratio
Table 2 gained each embodiment thickening material weight-average molecular weight
| Numbering | 1 | 2 | 3 |
| Weight-average molecular weight | 125000 | 105000 | 145000 |
Evaluation to the product of above 3 embodiments:
Cement paste experiment is carried out according to GB:T8076-2008 " Methods for testing uniformity of concrete admixture " regulation, takes cement 500g, adds 150g water; Utilize the clean slurry viscosity of rotary viscosity measuring; Cement slurry is initial, 1h degree of mobilization numerical value to adopt truncated cone circle mould to measure, and record divergence reaches the time required for 250mm simultaneously, and experimental result is as table 3.Can go out from table, from relative viscosity when divergence 250mm time time of needing, the efficient thickeners of synthesis adds 0.2-0.5g and significantly can improve slurry viscosity.
Table 3 thickening material Performance Detection is evaluated
In experiment, cement used is the ordinary Portland cement of strength grade 42.5, and efficient thickeners concentration is 10wt.%.
Concrete test result is as shown in table 4, and efficient thickeners significantly can improve concrete workability, and does not reduce 1h mobility.
Table 4 concrete mix
Efficient thickeners concentration is 10wt.% (mass percent).
Claims (10)
1. a high-effective concrete thickening material, is mixed by following component, and described component and content are:
Ring structure polymkeric substance 80 ~ 90wt%, the Acrylic Acid Monomer 2 ~ 8wt% of fatty alcohol side chain, phenylpropyl alcohol diene 2 ~ 8wt%, oxygenant 1.0 ~ 2.0wt%, stablizer 0.5 ~ 1.0wt%, chain-transfer agent 0.3 ~ 0.5wt%;
Wherein, the chemical formula of the ring structure polymkeric substance of fatty alcohol side chain is
or
r1 is-(CH
2)
moH, m=1-5, n=2-10.
2. high-effective concrete thickening material according to claim 1, is characterized in that (weight average) molecular weight of high-effective concrete thickening material is 10
4-10
5.2.
3. high-effective concrete thickening material according to claim 1 and 2, is characterized in that: described oxygenant is hydrogen peroxide or hypochlorite.
4. high-effective concrete thickening material according to claim 1 and 2, is characterized in that: described stablizer is xitix or riboflavin.
5. high-effective concrete thickening material according to claim 1 and 2, is characterized in that: described chain-transfer agent is mercaptoethanol or Thiovanic acid.
6. the preparation method of high-effective concrete thickening material according to claim 1, comprises the following steps:
One, ring structure polymkeric substance 80 ~ 90wt%, the Acrylic Acid Monomer 2 ~ 8wt% of fatty alcohol side chain, phenylpropyl alcohol diene 2 ~ 8wt%, oxygenant 1.0 ~ 2.0wt%, stablizer 0.5 ~ 1.0wt%, chain-transfer agent 0.3 ~ 0.5wt% is chosen;
Two, in the water-bath of 50-60 DEG C, the ring structure polymkeric substance of fatty alcohol side chain, Acrylic Acid Monomer are added together and stir and carries out esterification, then add phenylpropyl alcohol diene and oxygenant, stir and obtain homogeneous solution;
Three, in step one gained homogeneous solution, disposablely add stablizer and chain-transfer agent mixture, and continue to stir 3-4 hour, regulate pH be neutrality, add deionized water, obtain high-effective concrete thickening material.
7. the preparation method of high-effective concrete thickening material according to claim 6, is characterized in that: the weight-average molecular weight of high-effective concrete thickening material is 10
4-10
5.2.
8. the preparation method of high-effective concrete thickening material according to claim 6, is characterized in that: described oxygenant is hydrogen peroxide.
9. the preparation method of high-effective concrete thickening material according to claim 6, is characterized in that: described stablizer is xitix or riboflavin.
10. the preparation method of high-effective concrete thickening material according to claim 1, is characterized in that: described chain-transfer agent is mercaptoethanol or Thiovanic acid.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922532A (en) * | 2019-12-10 | 2020-03-27 | 金陵科技学院 | Preparation method of modified natural chitin-acrylic acid copolymerized multifunctional organic anti-dispersant for underwater undispersed concrete |
| CN112062898A (en) * | 2020-07-31 | 2020-12-11 | 国网冀北电力有限公司 | Calcium-resistant concrete thickener and preparation method thereof |
| CN113336464A (en) * | 2021-07-28 | 2021-09-03 | 湖南大学 | Concrete thickener and preparation method thereof |
| CN114907521A (en) * | 2022-07-04 | 2022-08-16 | 中国水利水电第七工程局有限公司 | Film-forming protection type anti-dispersant for underwater concrete and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980433A (en) * | 2014-05-16 | 2014-08-13 | 武汉汉星盛新型建材有限公司 | Carboxylate-vinyl copolymer concrete thickener and preparation method thereof |
-
2014
- 2014-11-28 CN CN201410715358.2A patent/CN104497211A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980433A (en) * | 2014-05-16 | 2014-08-13 | 武汉汉星盛新型建材有限公司 | Carboxylate-vinyl copolymer concrete thickener and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王一龙: "聚丙烯酸增稠剂的合成与性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 赵军子等: "疏水缔合型聚丙烯酸盐增稠剂的研究", 《印刷助剂》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922532A (en) * | 2019-12-10 | 2020-03-27 | 金陵科技学院 | Preparation method of modified natural chitin-acrylic acid copolymerized multifunctional organic anti-dispersant for underwater undispersed concrete |
| CN110922532B (en) * | 2019-12-10 | 2022-02-18 | 金陵科技学院 | Preparation method of modified natural chitin-acrylic acid copolymerized multifunctional organic anti-dispersing agent for underwater undispersed concrete |
| CN112062898A (en) * | 2020-07-31 | 2020-12-11 | 国网冀北电力有限公司 | Calcium-resistant concrete thickener and preparation method thereof |
| CN113336464A (en) * | 2021-07-28 | 2021-09-03 | 湖南大学 | Concrete thickener and preparation method thereof |
| CN114907521A (en) * | 2022-07-04 | 2022-08-16 | 中国水利水电第七工程局有限公司 | Film-forming protection type anti-dispersant for underwater concrete and preparation method thereof |
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