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Stability reinforcing agent for compounding of polycarboxylate superplasticizer and preparation method and application thereof

A technology of stabilizing enhancer and superplasticizer, applied in the field of building materials, can solve the problems of slowly floating to the surface, failure to rise, retarding components and thickening components cannot be uniformly dissolved, etc. Shelf life, easy storage, anti-flatulence effect

Active Publication Date: 2015-01-21
珠海春禾新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of tests and engineering practices have shown that the retarding components and thickening components commonly used in the past cannot be uniformly dissolved in the solution of polycarboxylate superplasticizers, some will immediately delaminate, and some will slowly float to the surface. Can't play a role
Therefore, it is inappropriate to use the traditional simple compounding method to modify the polycarboxylate superplasticizer.

Method used

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  • Stability reinforcing agent for compounding of polycarboxylate superplasticizer and preparation method and application thereof
  • Stability reinforcing agent for compounding of polycarboxylate superplasticizer and preparation method and application thereof
  • Stability reinforcing agent for compounding of polycarboxylate superplasticizer and preparation method and application thereof

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Embodiment 1

[0030] The pH value of the polycarboxylate superplasticizer masterbatch (PCA) is 4.2, and the pH value controlled by the compound product is 8.0.

[0031] The weight percentage of each component of the stabilizing enhancer for the compounding of the polycarboxylic acid superplasticizer in this embodiment is: 8% strong alkali, 22% alkaline buffer, 20% alkaline preservative, surplus water .

[0032] The total solid content of this embodiment is 50%, wherein, the alkaline buffer is formulated according to the controlled pH value requirement (8.0) and the pKa value of sodium acetate and TEA. In this embodiment, the molar ratio of sodium acetate to TEA is It is 2:3.

[0033] The preparation method of embodiment 1 is as follows:

[0034] a. Alkali preparation: According to the pH value of the polycarboxylate superplasticizer masterbatch, calculate the amount of strong alkali that can adjust the pH value of the polycarboxylate superplasticizer masterbatch to 6-8, and dissolve it in...

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Abstract

The invention relates to a stability reinforcing agent for the compounding of a polycarboxylate superplasticizer. The stability reinforcing agent comprises the following components in percentage by weight: 0-10% of strong alkali, 20-30% of alkaline buffering agent, 20-30% of alkaline preservative agent and the balance of water, wherein the sum of the contents of all the components is equal to 100%. The invention further relates to a preparation method of the stability reinforcing agent and application of the stability reinforcing agent. The stability reinforcing agent can remarkably prolong the quality guarantee period of a polycarboxylate superplasticizer product, has no side effects and can effectively prevent the occurrence of adverse reactions, such as flatulence, souring and the like; the stability of a coagulation retarding component, a thickening component and the like in the polycarboxylate superplasticizer product is improved, so that the phenomena of layering, precipitation, even performance deterioration, and the like can not occur; and the reinforcing performance and the like of polycarboxylate superplasticizer compounded products can be effectively improved, so that a polycarboxylate system can be alkaline for a long time and does not corrode iron and steel, and the storage is convenient and safe.

Description

【Technical field】 [0001] The invention relates to a stable enhancer for compounding polycarboxylic acid superplasticizers, and also relates to a preparation method and application of the enhancer, belonging to the technical field of building materials. 【Background technique】 [0002] The application of high-efficiency water reducer in concrete is a revolutionary progress in concrete technology, which plays an important role in improving the quality and service life of buildings, reducing energy consumption, saving cement and reducing environmental pollution. With the continuous development of the popularization and use of commercial concrete, a series of engineering problems have emerged, such as low strength, easy segregation and bleeding, etc., and the probability of concrete shrinkage cracks has increased; especially the use of low water-cement ratio (water-cement ratio) The early cracking phenomenon of high early strength concrete structures seriously affects the safety ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12
Inventor 高仁辉宋德强方向明
Owner 珠海春禾新材料研究院有限公司
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