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A kind of polycarboxylic acid water-retaining agent, preparation method and use thereof

A technology of water-retaining agent and polycarboxylic acid, which is applied in the field of concrete admixture, can solve the problems of unsatisfactory use of raw materials and poor cement effect, etc., and achieve the effects of improving volume stability and durability, small shrinkage of concrete, and simple production process

Inactive Publication Date: 2016-08-31
RIZHAO POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many water retaining agents have very different effects when applied to cement in different places, and the existing technology cannot meet the use requirements of raw materials in some places

Method used

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  • A kind of polycarboxylic acid water-retaining agent, preparation method and use thereof
  • A kind of polycarboxylic acid water-retaining agent, preparation method and use thereof
  • A kind of polycarboxylic acid water-retaining agent, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Weigh 360kg of polyether macromonomer, put it into a mixing tank, add water until it is evenly stirred, and use the dissolved solution as a base material;

[0022] Step 2: Weigh 25kg of small monomers of acrylic acid, 1.2kg of mercaptopropionic acid, 0.8kg of vitamin C and 1.5kg of ammonium persulfate, dissolve them in water, and add them dropwise to the stirring tank for 2 hours;

[0023] Step 3: Weigh 2 kg of hydrogen peroxide and directly add it to the stirring tank;

[0024] Step 4: High temperature 60 degrees, reaction time 6 hours, obtained water retaining agent.

Embodiment 2

[0026] Step 1: Weigh 450 kg of polyether macromonomer, put it into a stirring tank, add water until it is evenly stirred, and use the dissolved solution as a base material;

[0027] Step 2: Weigh 31.25 kg of acrylic acid small monomer, 1.5 kg of mercaptopropionic acid, 1 kg of vitamin C and 1.875 kg of ammonium persulfate, dissolve them in water, and add them dropwise to the stirring tank for 2 hours;

[0028] Step 3: Weigh 2.5kg of hydrogen peroxide and directly add it to the stirring tank;

[0029] Step 4: High temperature 60 degrees, reaction time 6 hours, obtained water retaining agent.

Embodiment 3

[0031] Step 1: Weigh 922.5 kg of polyether macromonomer, put it into a stirring tank, add water until it is evenly stirred, and use the dissolved solution as a base material;

[0032] Step 2: Weigh 64kg of small monomers of acrylic acid, 3.075kg of mercaptopropionic acid, 2.05kg of vitamin C and 3.84kg of ammonium persulfate, dissolve them in water, and add them dropwise to the stirring tank for 2 hours;

[0033] Step 3: Weigh 5.125 kg of hydrogen peroxide and directly add it to the stirring tank;

[0034] Step 4: High temperature 60 degrees, reaction time 6 hours, obtained water retaining agent.

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Abstract

The invention discloses a polycarboxylic acid water retention agent, and a preparation method and application thereof. The water retention agent is prepared from polyether, acrylic acid, vitamin C, mercaptopropionic acid, ammonium persulfate and hydrogen peroxide. The process mainly improves the pore distribution of the concrete against the participation of the water retention agent, thereby increasing the concrete compactness, keeping the internal water of the concrete and accelerating the later hydration effect of the cementing material. All the agents are sequentially mixed according to different functions and react under certain conditions. The formula is only against the water retention agent with local material characteristics. The product has the advantages of improved local material applicability of the additives, wider application range, favorable effect and obvious cost advantage.

Description

technical field [0001] The invention relates to the technical field of concrete admixture, in particular to a polycarboxylate water-retaining agent and a preparation method thereof, and also relates to the use of the water-retaining agent. Background technique [0002] At present, concrete is needed in bridges, roads, subways and other projects. In order to meet the rapid development of other projects such as the construction industry, higher requirements are put forward for the performance of concrete. High-performance concrete and green concrete are the mainstream products of commercial concrete. Admixture is the third leap in concrete technology and an important technical way to improve concrete performance. In order to improve the workability of concrete and reduce environmental pollution in the process of producing admixtures, the research and development of polycarboxylate admixtures has been highly valued. Polycarboxylate admixtures are high-efficiency copolymers of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F4/40C04B24/24C04B24/32C04B28/04
Inventor 徐锡权杨志刚申淑荣魏义赵春鹤
Owner RIZHAO POLYTECHNIC
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