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Super-strong slump retaining agent and processing method thereof

A slump-retaining agent, super strong technology, applied in the field of super-strong slump-retaining agent and its processing, can solve the problems of slowing down the slump loss, achieve no slump loss, ensure slump loss, and change over time Improved effect

Active Publication Date: 2014-04-16
大连市铭源全科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above methods have slowed down the slump loss, they have not fundamentally solved the problem

Method used

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  • Super-strong slump retaining agent and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Raw material composition:

[0022] a prenol polyoxyethylene ether

[0023] b Acrylic

[0024] c ethyl acrylate

[0025] d allyl methacrylate

[0026] ammonium persulfate

[0027] f sodium methacrylate,

[0028] The molar ratio of the raw materials is: a:b:c:d:f=1:2:2:0.1:0.4, and the amount of e is 0.5% of the total weight of a, b and c.

[0029] The synthesis method of super-strong slump-retaining agent, dissolve b and d together in water to make 30% drop solution A, dissolve e in water to make 5% drop solution B, add water into the reaction kettle, and then make a , c, f are added to the reactor in turn, stirred and melted, and the temperature is raised to 60-70°C, and the dripping liquid A and B are evenly added dropwise into the reactor at the same time, and the addition is completed in 3 to 4 hours, and continue to be kept for 60 ~70°C for 1 hour, the reaction is complete.

Embodiment 2

[0031] Raw material composition:

[0032] a prenol polyoxyethylene ether

[0033] bMethacrylic acid

[0034] c Propyl acrylate

[0035] d allyl methacrylate

[0036] Potassium persulfate

[0037] f sodium methacrylate,

[0038] The molar ratio of the raw materials is: a: b: c: d: f=1: 1.5: 1.5: 0.05: 0.3, and the amount of e is 1.0% of the total weight of a, b and c.

[0039] The synthesis method of super-strong slump-retaining agent, dissolve b and d together in water to make 50% drop solution A, dissolve e in water to make 10% drop solution B, add water into the reaction kettle, and then make a , c, f are added to the reactor in turn, stirred and melted, and the temperature is raised to 60-70°C, and the dripping liquid A and B are evenly added dropwise into the reactor at the same time, and the addition is completed in 3 to 4 hours, and continue to be kept for 60 ~70°C for 1 hour, the reaction is complete.

Embodiment 3

[0041] a prenol polyoxyethylene ether

[0042] bAcrylic acid and methacrylic acid

[0043] c ethyl acrylate and propyl acrylate

[0044] d allyl methacrylate

[0045] e ammonium persulfate and potassium persulfate

[0046] f sodium methacrylate,

[0047] The molar ratio of the raw materials is: a: b: c: d: f=1: 2.5: 2: 0.15: 0.6, and the amount of e is 1.0% of the total weight of a, b and c.

[0048] The preferred molar ratio of raw materials a:b:c:d:f=1:2:2:0.1:0.4.

[0049] The synthesis method of super-strong slump-retaining agent, dissolve b and d together in water to make 30% drop solution A, dissolve e in water to make 5% drop solution B, add water into the reaction kettle, and then make a , c, f are added to the reactor in turn, stirred and melted, and the temperature is raised to 60-70°C, and the dripping liquid A and B are evenly added dropwise into the reactor at the same time, and the addition is completed in 3 to 4 hours, and continue to be kept for 60 ~70°C ...

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Abstract

The invention discloses a super-strong slump retaining agent. The super-strong slump retaining agent is composed of following raw materials: a, isopentenol polyoxyethylene ether, b, acrylic acid or methylacrylic acid or a mixture thereof, c, ethyl acrylate or propyl acrylate or a mixture thereof, d, allyl methacrylate, e, ammonium persulfate or potassium persulfate, and f, sodium methallyl sulfonate, wherein the mol ratio of the raw materials is as follows: a:b:c:d:f=1:(1.5-2.5):(1.5-2):(0.05-0.15):(0.3-0.6); the use amount of the e accounts for 0.5%-1.0% of the total weight of a, b and c. According to the slump retaining agent, the initial water-reducing rate is not influenced and the time-dependent change amount of the concrete slump degree is obviously improved; the loss of the slump degree can be not generated in three hours; the requirements of concrete agitating and transporting, pumping, pouring technical processes, and the high-strength requirements can be completely met; the super-strong slump retaining agent has good workability.

Description

technical field [0001] The invention relates to an admixture for the construction industry, in particular to a super-strong slump-retaining agent and a processing method thereof. Background technique [0002] At present, the concrete admixtures used in China mainly include naphthalene-based superplasticizers, melamine superplasticizers, lignosulfonate superplasticizers, and sugar-calcium superplasticizers. The former two are mostly used to prepare high-grade concrete, and the latter two are mostly used to prepare low-grade concrete due to their low water-reducing rate. All concretes using these admixtures generally have the problem of rapid loss of concrete slump. [0003] At present, the loss of concrete slump is mainly controlled by the following methods: (1) the method of post-mixing superplasticizer; (2) using retarder; (3) using C 3 Cement with low A content; (4) increase the early residual amount of superplasticizer in the liquid phase; (5) repeatedly add superplastic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/18C08F220/40C08F228/02C04B24/26C04B103/30
Inventor 宫振鑫
Owner 大连市铭源全科技开发有限公司
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