CN105217992A - A kind of concrete high-efficiency segregation reducing agent and using method thereof - Google Patents
A kind of concrete high-efficiency segregation reducing agent and using method thereof Download PDFInfo
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- CN105217992A CN105217992A CN201510705704.3A CN201510705704A CN105217992A CN 105217992 A CN105217992 A CN 105217992A CN 201510705704 A CN201510705704 A CN 201510705704A CN 105217992 A CN105217992 A CN 105217992A
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Abstract
The invention discloses a kind of concrete high-efficiency segregation reducing agent and using method thereof, the polyoxyethylene glycol of certain proportion, different molecular weight is dissolved in polycarboxylate water-reducer, in the lump with abundant mixing and stirring of concrete raw material such as water, cement, sand, stones, the workability of Cracking of High Flowing Concrete effectively can be improved.The consumption of polyoxyethylene glycol used is polycarboxylate water-reducer quality 0.5 ~ 3.0%.Compared with prior art, the invention has the beneficial effects as follows: by adding a certain proportion of polyoxyethylene glycol in polycarboxylate water-reducer, effectively can improve agent on crack resistance of concrete segregation, reduce the performances such as concrete water bleeding bleeding, particularly effectively improve the good workability of concrete at polycarboxylate water-reducer when surpassing and mixing, and do not affect concrete intensity, and production technique of the present invention is simple, with low cost.
Description
Technical field
The present invention relates to concrete field, specifically a kind of concrete high-efficiency segregation reducing agent and using method thereof.
Background technology
Along with the development of society, the quickening of urban construction paces, the requirement of people to commerical ready-mixed concrete improves constantly.And in Practical Project, particularly the problem of concrete disintegration has a strong impact on concrete quality and concrete construction, and concrete high-efficiency segregation reducing agent effectively can solve the problem of concrete disintegration, reduce concrete to the susceptibility of water reducer volume, effectively promote the workability of fresh concrete.
Studies in China personnel have attempted multiple means to reduce chutable concrete segregation, also achieve certain achievement.Xu Changwei, Zhang Yang, Yang Menghui, the people such as Gao Jie are at " research that mineral admixture can affect lightweight aggregate concrete education resistance " (Xu Changwei, Zhang Yang, Yang Menghui, Gao Jie, concrete .2012,9:77-79) in have studied mineral admixture to lightweight aggregate concrete education resistance can improvement degree.Zhang Yun state, Wu Zhimin, Zhang Xiaoyun, the people such as Wu Xi are in " Self-compacting Lightweight Aggregates Concrete education resistance controls and test method " (Zhang Yun state, Wu Zhimin, Zhang Xiaoyun, Wu Xi, Journal of Dalian University of Technology Total .2010,50(2)) in have studied different concrete mix under concrete education resistance energy.Ye Yanhua, Chen Lihua, Du Yanjing, Zhu state equality people is at " high efficiency water reducing agent and viscosity increaser are on the impact of Performance of Self-compacting Concrete " (Ye Yanhua, Chen Lihua, Du Yanjing, Zhu Guoping, concrete .2008(6)) in have studied the test that high efficiency water reducing agent SP and viscosity increaser VMA improves agent on crack resistance of concrete segregation performance under low water binder ratio.But these modes still do not reach desirable effect to concrete segregation, brought anti-segregation effect mixed for cement water reducing agent super still very poor, therefore require further improvement.
Summary of the invention
The object of the present invention is to provide a kind of concrete high-efficiency segregation reducing agent and the using method thereof that effectively can solve concrete disintegration, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of concrete segregation reducing agent: adopt polyoxyethylene glycol to use in the concrete being mixed with polycarboxylate water-reducer as segregation reducing agent, its molecular weight is 200 ~ 2000.Consider the sensitivity of cost and use: the preferred molecular weight of polyoxyethylene glycol is 800 ~ 1000.
A kind of using method of concrete segregation reducing agent: a certain proportion of polyoxyethylene glycol is dissolved in a certain amount of polycarboxylate water-reducer, the consumption of polyoxyethylene glycol is polycarboxylate water-reducer quality 0.5 ~ 3.0%, and the test concrete being mixed with polyoxyethylene glycol segregation reducing agent is carried out property indices test, shaping and normal curing 28 days, measures its ultimate compression strength.
As the further scheme of the present invention: the preferable amount of polyoxyethylene glycol is polycarboxylate water-reducer quality 1.0 ~ 2.0%.
Compared with prior art, the present invention is by adding polyoxyethylene glycol as segregation reducing agent in polycarboxylate water-reducer, to improve agent on crack resistance of concrete segregation performance, does not also reduce concrete crushing strength.And production technique of the present invention is simple, with low cost.
Embodiment
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Contrast concrete: C30 mix proportion is: cement: breeze: flyash: sand: stone: water: polycarboxylate water-reducer=220:80:65:780:1080:175:8.0, wherein polycarboxylate water-reducer is mixed for super.Measure its slump expanding value, and observe and decide its whether emanate and bleeding, blanks and moulding and conserving; According to identical test method, respectively the polyoxyethylene glycol of different molecular weight, respectively by 0.5%, 1.0%.2.0%, 3.0% adds in polycarboxylate water-reducer, the volume of polyoxyethylene glycol is the mass percent of water reducer consumption, and by C30 mix proportion is: cement: breeze: flyash: sand: stone: water: polycarboxylate water-reducer=220:80:65:780:1080:175:8.0 prepares.Same mensuration concrete slump expanding value, and observe it and whether emanate and bleeding, blanks and moulding and conserving.Finally measure the concrete crushing strength of 28 days.
Embodiment 1
Cement 4.4kg is added in the concrete mixer of 60 liters, breeze 1.6kg, flyash 1.3kg, sand 15.6kg, stone 21.6kg, discharging after the mixing solutions of water 3.5kg and polycarboxylate water-reducer 160g and 0.8g Macrogol 200 stirs, measures the slump expanding value after initial slump expanding value and 30min.By the concrete formation be stirred, then maintenance 28d under normal curing condition, measures its ultimate compression strength.The concrete correlated performance measured is in table 1.
Embodiment 2
Cement 4.4kg is added, breeze 1.6kg, flyash 1.3kg in stirrer, sand 15.6kg, stone 21.6kg, discharging after the mixing solutions of water 3.5kg and polycarboxylate water-reducer 160g and 1.6g Macrogol 200 stirs, measures the slump expanding value after initial slump expanding value and 30min.By the concrete formation be stirred, then maintenance 28d under normal curing condition, measures its ultimate compression strength.The concrete correlated performance measured is in table 1.
Embodiment 3
Cement 4.4kg is added, breeze 1.6kg, flyash 1.3kg in stirrer, sand 15.6kg, stone 21.6kg, discharging after the mixing solutions of water 3.5kg and polycarboxylate water-reducer 160g and 3.2g Macrogol 200 stirs, measures the slump expanding value after initial slump expanding value and 30min.By the concrete formation be stirred, then maintenance 28d under normal curing condition, measures its ultimate compression strength.The concrete index of correlation measured is in table 1.
Embodiment 4
Cement 4.4kg is added, breeze 1.6kg, flyash 1.3kg in stirrer, sand 15.6kg, stone 21.6kg, discharging after the mixing solutions of water 3.5kg and polycarboxylate water-reducer 160g and 4.8g Macrogol 200 stirs, measures the slump expanding value after initial slump expanding value and 30min.By the concrete formation be stirred, then maintenance 28d under normal curing condition, measures its ultimate compression strength.The concrete correlated performance measured is in table 1.。
Comparative example
Cement 4.4kg is added in stirrer, breeze 1.6kg, flyash 1.3kg, sand 15.6kg, stone 21.6kg, water 3.5kg and polycarboxylate water-reducer 160g, discharging after stirring 180s, measures the slump expanding value after initial slump expanding value and 30min, by the concrete formation be stirred, after form removal under normal curing condition maintenance 28d, detect its ultimate compression strength.The concrete correlated performance measured is in table 1.
Table 1 molecular weight polyethylene glycol is 200 embodiment concrete correlated performances
The polyoxyethylene glycol being 400,800,1000,1500 and 2000 to molecular weight respectively again adds polycarboxylate water-reducer to be tested by above-mentioned concrete, the consumption of the polyoxyethylene glycol of different molecular weight is respectively 0.8g, 1.6g, 3.2g and 4.8g, and the concrete correlated performance of mensuration is respectively in table 2, table 3, table 4, table 5 and table 6.
Table 2 molecular weight polyethylene glycol is 400 embodiment concrete correlated performances
Table 3 molecular weight polyethylene glycol is 800 embodiment concrete correlated performances
Table 4 molecular weight polyethylene glycol is 1000 embodiment concrete correlated performances
Table 5 molecular weight polyethylene glycol is 1500 embodiment concrete correlated performances
Table 6 molecular weight polyethylene glycol is 2000 embodiment concrete correlated performances
Can analyze from above table and reach a conclusion, in concrete high-efficiency segregation reducing agent, the optimum molecular weight ranges of polyoxyethylene glycol is 800 ~ 1000, and the volume scope of polyoxyethylene glycol is 1.0 ~ 2.0% of polycarboxylate water-reducer quality, and concrete over-all properties is optimum.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.
Claims (2)
1. a concrete high-efficiency segregation reducing agent, is characterized in that: adopt polyoxyethylene glycol to use in the concrete being mixed with polycarboxylate water-reducer as segregation reducing agent, molecular weight polyethylene glycol is 200 ~ 2000, and its preferred molecular weight is 800 ~ 1000.
2. the using method of concrete high-efficiency segregation reducing agent according to claim 1, it is characterized in that: will necessarily be dissolved in polycarboxylate water-reducer than the polyoxyethylene glycol of row, the consumption of polyoxyethylene glycol is polycarboxylate water-reducer quality 0.5 ~ 3.0%, and the preferable amount of polyoxyethylene glycol is polycarboxylate water-reducer quality 1.0 ~ 2.0%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105669911A (en) * | 2016-01-14 | 2016-06-15 | 厦门路桥翔通建材科技有限公司 | Concrete water-retention anti-segregation agent and preparation method thereof |
| CN113912320A (en) * | 2021-11-30 | 2022-01-11 | 西安同成建筑科技有限责任公司 | Preparation method and application of anti-segregation agent for concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217515B (en) * | 2013-03-26 | 2015-04-15 | 济南追易建筑材料技术有限公司 | Determination method of cement concrete mixture water-cement ratio |
| CN104891853A (en) * | 2015-06-05 | 2015-09-09 | 陕西友邦新材料科技有限公司 | Composite anti-mud agent based on polycarboxylate-type pumping agent, anti-mud pumping agent and preparation method of anti-mud pumping agent |
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2015
- 2015-10-27 CN CN201510705704.3A patent/CN105217992A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217515B (en) * | 2013-03-26 | 2015-04-15 | 济南追易建筑材料技术有限公司 | Determination method of cement concrete mixture water-cement ratio |
| CN104891853A (en) * | 2015-06-05 | 2015-09-09 | 陕西友邦新材料科技有限公司 | Composite anti-mud agent based on polycarboxylate-type pumping agent, anti-mud pumping agent and preparation method of anti-mud pumping agent |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105669911A (en) * | 2016-01-14 | 2016-06-15 | 厦门路桥翔通建材科技有限公司 | Concrete water-retention anti-segregation agent and preparation method thereof |
| CN105669911B (en) * | 2016-01-14 | 2018-05-04 | 厦门路桥翔通建材科技有限公司 | A kind of concrete water conservation segregation reducing agent and preparation method thereof |
| CN113912320A (en) * | 2021-11-30 | 2022-01-11 | 西安同成建筑科技有限责任公司 | Preparation method and application of anti-segregation agent for concrete |
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Application publication date: 20160106 |