CN102731014A - Polycarboxylic acid-lignin composite additive - Google Patents

Polycarboxylic acid-lignin composite additive Download PDF

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Publication number
CN102731014A
CN102731014A CN2012102237084A CN201210223708A CN102731014A CN 102731014 A CN102731014 A CN 102731014A CN 2012102237084 A CN2012102237084 A CN 2012102237084A CN 201210223708 A CN201210223708 A CN 201210223708A CN 102731014 A CN102731014 A CN 102731014A
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CN
China
Prior art keywords
carboxylic acid
composite additive
poly carboxylic
concrete
xylogen
Prior art date
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Pending
Application number
CN2012102237084A
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Chinese (zh)
Inventor
冯为民
王强
宋海燕
杨储冬
孙丽华
卢金国
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SHANGHAI CONSTRUCTION MEMBER PRODUCTS CO Ltd
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SHANGHAI CONSTRUCTION MEMBER PRODUCTS CO Ltd
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Priority to CN2012102237084A priority Critical patent/CN102731014A/en
Publication of CN102731014A publication Critical patent/CN102731014A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a polycarboxylic acid-lignin composite additive. The additive is characterized in that: the additive is composed of the components of, by weight: 20-45% of a polycarboxylic acid water reducer, 1-11% of a lignin water reducer, 0.01-0.5% of an air-entraining agent, 0-3% of a slump-retaining agent, 0-0.9% of a retarding agent, 0-3% of an early strength agent, and 39-66% of water. The total amount of the components accounts for 100% by mass. When the contents of the slump-retaining agent and the retarding agent are not 0, the content of the early strength agent is 0. When the content of the early strength agent is not 0, the contents of the slump-retaining agent and the retarding agent are both 0. According to the invention, the polycarboxylic acid water reducer and the lignin water reducer are complexed. Compared with a single polycarboxylic acid water reducer or a single lignin water reducer, under a same concrete water reducing rate, the dosage of the polycarboxylic acid component is reduced, and the cost is reduced. The quality of the concrete is easy to control, and quality fluctuation is reduced. The water reducing rate of the concrete is improved. When the additive is added into concrete, the quality of the concrete is improved.

Description

Poly carboxylic acid-xylogen composite additive
Technical field
The present invention relates to a kind of poly carboxylic acid and xylogen compound concrete admixture.
Background technology
In recent years; Along with the successful development and the large-scale application of high performance water reducing agent of polyocarboxy acid of new generation, make China's concrete admixture industry gradually by the system of the concrete admixture system transition that is the basis with xylogen and naphthalene series high-efficiency water-reducing agent for being the basis with xylogen and polycarboxylate high performance water-reducing agent.Under the dual consideration of concrete production enterprise and unit in charge of construction, basically formed middle low-grade concrete in the industry and used the xylogen water reducer, and high-grade concrete is with the use general layout of polycarboxylate water-reducer based on production cost and assurance construction quality.
After but national standard " concrete admixture " GB8076-2008 and Shanghai City specifications of engineering construction " ready mixed concrete production technology regulation " DG/TJ08-227-2009 implements; The sulfonated lignin water reducer is because little, the concrete crushing strength of its water-reducing rate than self weakness such as low, is difficult to satisfy the requirement of this standard.Therefore the ratio in concrete, used separately of sulfonated lignin water reducer will significantly reduce, and through rationally composite with other component be the practical applications scope of expanding the sulfonated lignin water reducer, one of outlet in low-grade concrete market in capturing again.
Sulfonated lignin and naphthalene are that the composite middle effect admixture that forms is a compound scheme existing in the market, comparative maturity.Use the poly carboxylic acid efficient additive in the HS grade concrete and have the better economic technical superiority.But often there are inconsistent problem in naphthalene water reducer and polycarboxylate water-reducer, and this just makes the concrete production enterprise of a lot of use poly carboxylic acid admixtures be unwilling to use the admixture that contains naphthalene water reducer.Therefore, development is the needs in middle low-grade concrete market and the requirement of the many-sided performance of concrete material with the middle effect type admixture that poly carboxylic acid-xylogen is the basis.
Summary of the invention
The technical problem that the present invention will solve provides a kind of concrete admixture that mainly is composited by xylogen and poly carboxylic acid, to overcome the above-mentioned defective that prior art exists.
For solving the problems of the technologies described above, a kind of poly carboxylic acid of the present invention-xylogen composite additive, form by following components in weight percentage:
The shared mass percent sum of each component is 100%;
And satisfy:
When the content of slump retaining agent and retardant was not 0, hardening accelerator content was 0;
When hardening accelerator content was not 0, the content of slump retaining agent and retardant all was 0.
Said polycarboxylate water-reducer optimization polypropylene esters of gallic acid water reducer, the quality solid content is preferably 20%;
One or both of preferred calcium lignin sulphonate of said xylogen water reducer or magnesium lignosulfonate;
One or both of preferred sodium laurylsulfonate of said air entrapment agent or saponin(e;
The preferred organic acid salt of said slump retaining agent, preferably Sunmorl N 60S;
The preferred monose of said retardant, preferably white sugar;
One or both of preferred trolamine of said hardening accelerator or calcium chloride.
Another object of the present invention provides a kind of above-mentioned poly carboxylic acid-application of xylogen composite additive in concrete production, and the volume of this admixture is 0.8% ~ 2% of a gelling material gross weight in concrete.
Above-mentioned raw materials all adopts conventional commercially available prod.
Poly carboxylic acid of the present invention-xylogen composite additive adopts this area ordinary method preparation; For example adopt following method: with above-mentioned each component by weight carrying out weighing; And carry out physical agitation through machinery, obtain said poly carboxylic acid-xylogen composite additive after the mixing.
Among the present invention, polycarboxylate water-reducer can increase concrete flowability, workability and suppress concrete slump loss; The xylogen water reducer had both played diminishing, plastification, can be used as the absorption of sacrifice agent water supply mud again; Air entrapment agent plays the bleed effect, and certain water-reduction is arranged simultaneously; Slump retaining agent can reduce concrete slump through time loss and can increase concrete plasticity-and intensity; The retardant retarding effect is better, and inhibition of slump-loss is had more significantly effect; Hardening accelerator plays the aquation of accelerating tricalcium aluminate, and the early strength function of excited cement has no adverse effects to late strength of concrete.
Poly carboxylic acid-xylogen composite additive that the present invention is prepared, because compound xylogen water reducer compares with independent use polycarboxylate water-reducer, during identical concrete water-reducing ratio, polycarboxylate component's consumption reduces, cost reduces; After simultaneously in joining concrete, the susceptibility reduction to concrete raw material (as: sand, stone and cement) quality and water consumption makes concrete quality minimizing quality fluctuation easy to control.Compare with independent use xylogen water reducer, concrete water-reducing ratio improves, join in the concrete after, concrete quality improves.
Embodiment
Embodiment 1
With weight percent be: polycarboxylate water-reducer (the quality solids content is 20%) 38.5%, xylogen water reducer 11%, air entrapment agent 0.1%, slump retaining agent 2%, retardant 0.6%, water 47.8%, join stirring tank successively, promptly get these article after mixing.Mix this admixture of by mass of cement 1%, can make wc is that 0.35 flowing degree of net paste of cement is 190mm.In concrete, add this admixture that accounts for gelling material gross weight 1%, concrete water-reducing ratio is that 17%, 1 hour slump-loss is 10mm, prolongs 2 hours time of coagulation, and compressive strength rate reached 120% in 28 days.
Embodiment 2
With weight percent frequently be: polycarboxylate water-reducer (the quality solids content is 20%) 45%, xylogen water reducer 5%, air entrapment agent 0.1%, hardening accelerator 2%, tap water 47.9%, join stirring tank successively, promptly get these article after mixing.Mix this admixture of by mass of cement 1.2%, can make wc is that 0.35 flowing degree of net paste of cement is 210mm.In concrete, add this admixture that accounts for gelling material gross weight 1.2%, concrete water-reducing ratio is that 19%, 1 hour slump-loss is 15mm, and 7 days compressive strength rates are that 130%, 28 day compressive strength rate is 115%.

Claims (10)

1. poly carboxylic acid-xylogen composite additive is characterized in that, is made up of following components in weight percentage:
The shared mass percent sum of each component is 100%;
And satisfy:
When the content of slump retaining agent and retardant was not 0, hardening accelerator content was 0;
When hardening accelerator content was not 0, the content of slump retaining agent and retardant all was 0.
2. poly carboxylic acid according to claim 1-xylogen composite additive is characterized in that, said polycarboxylate water-reducer is the polyacrylate(s) water reducer, and the quality solid content is 20%.
3. poly carboxylic acid according to claim 1-xylogen composite additive is characterized in that, said xylogen water reducer is one or both of calcium lignin sulphonate or magnesium lignosulfonate.
4. poly carboxylic acid according to claim 1-xylogen composite additive is characterized in that, said air entrapment agent is one or both of sodium laurylsulfonate or saponin(e.
5. poly carboxylic acid according to claim 1-xylogen composite additive is characterized in that said slump retaining agent is selected from organic acid salt.
6. poly carboxylic acid according to claim 5-xylogen composite additive is characterized in that, said slump retaining agent is a Sunmorl N 60S.
7. poly carboxylic acid according to claim 1-xylogen composite additive is characterized in that said retardant is selected from monose.
8. poly carboxylic acid according to claim 7-xylogen composite additive is characterized in that, said retardant is a white sugar.
9. poly carboxylic acid according to claim 1-xylogen composite additive is characterized in that, said hardening accelerator is one or both of trolamine or calcium chloride.
10. like 1~9 each the said poly carboxylic acid-application of xylogen composite additive in concrete production, it is characterized in that, is 0.8% ~ 2% of gelling material gross weight at the addition of poly carboxylic acid described in the concrete-xylogen composite additive.
CN2012102237084A 2012-06-29 2012-06-29 Polycarboxylic acid-lignin composite additive Pending CN102731014A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103011659A (en) * 2012-12-21 2013-04-03 江西迪特科技有限公司 Super retarding high-performance water reducer
CN103408242A (en) * 2013-08-28 2013-11-27 北京金隅水泥节能科技有限公司 Super slump type polycarboxylate water reducing agent for bored pile concrete and preparation method thereof
CN104003643A (en) * 2014-05-16 2014-08-27 北京市新世纪东方建筑材料有限公司 Liquid polycarboxylic acid concrete pumping antifreezing agent and preparation method thereof
CN105601155A (en) * 2015-12-29 2016-05-25 中建商品混凝土有限公司 Additive special for limestone powder concrete
CN105884243A (en) * 2014-09-03 2016-08-24 安徽皖科新科技发展有限公司 Concrete enhancer and preparation and application method thereof
CN106007472A (en) * 2016-05-24 2016-10-12 十九冶成都建设有限公司 Composite water reducing agent for slag powder/rock powder high-content double-doped concrete
CN106116231A (en) * 2016-06-24 2016-11-16 桂林华越环保科技有限公司 A kind of compound concrete high efficiency water reducing agent
CN106542767A (en) * 2016-12-02 2017-03-29 郑州峰泰纳米材料有限公司 A kind of composite superplasticizer and preparation method thereof
CN108218284A (en) * 2018-01-31 2018-06-29 广东强仕建材科技有限公司 Cement water reducing agent composition
CN110526613A (en) * 2019-09-18 2019-12-03 中国水利水电第七工程局有限公司 A kind of aluminum dipping form specialized superfine sand pump send concrete polycarboxylate water-reducer
CN111908824A (en) * 2020-05-25 2020-11-10 中铁五局集团第四工程有限责任公司 Composite concrete admixture and preparation method and application thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101215116A (en) * 2007-12-27 2008-07-09 同济大学 Retardation setting type polycarboxylic acids series water reducing agent

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101215116A (en) * 2007-12-27 2008-07-09 同济大学 Retardation setting type polycarboxylic acids series water reducing agent

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103011659A (en) * 2012-12-21 2013-04-03 江西迪特科技有限公司 Super retarding high-performance water reducer
CN103408242A (en) * 2013-08-28 2013-11-27 北京金隅水泥节能科技有限公司 Super slump type polycarboxylate water reducing agent for bored pile concrete and preparation method thereof
CN104003643A (en) * 2014-05-16 2014-08-27 北京市新世纪东方建筑材料有限公司 Liquid polycarboxylic acid concrete pumping antifreezing agent and preparation method thereof
CN105884243A (en) * 2014-09-03 2016-08-24 安徽皖科新科技发展有限公司 Concrete enhancer and preparation and application method thereof
CN105601155A (en) * 2015-12-29 2016-05-25 中建商品混凝土有限公司 Additive special for limestone powder concrete
CN106007472A (en) * 2016-05-24 2016-10-12 十九冶成都建设有限公司 Composite water reducing agent for slag powder/rock powder high-content double-doped concrete
CN106116231A (en) * 2016-06-24 2016-11-16 桂林华越环保科技有限公司 A kind of compound concrete high efficiency water reducing agent
CN106542767A (en) * 2016-12-02 2017-03-29 郑州峰泰纳米材料有限公司 A kind of composite superplasticizer and preparation method thereof
CN108218284A (en) * 2018-01-31 2018-06-29 广东强仕建材科技有限公司 Cement water reducing agent composition
CN108218284B (en) * 2018-01-31 2021-04-27 广东强仕建材科技有限公司 Concrete water reducing agent composition
CN110526613A (en) * 2019-09-18 2019-12-03 中国水利水电第七工程局有限公司 A kind of aluminum dipping form specialized superfine sand pump send concrete polycarboxylate water-reducer
CN111908824A (en) * 2020-05-25 2020-11-10 中铁五局集团第四工程有限责任公司 Composite concrete admixture and preparation method and application thereof

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