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Multifunctional low-alkali low-content expanding agent

A multifunctional, expansive agent technology, applied in the field of concrete admixtures, can solve the problems of high cost, reduced strength, high alkali content, etc., and achieve the effects of reduced project cost, less slump loss, and stable expansion rate

Inactive Publication Date: 2009-03-18
高翊杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] But above-mentioned expansive agent still exists the problem that dosage is high, and alkali content is on the high side, also exists concrete expansibility instability simultaneously, later stage strength reduces, cost is high, performance is single (can only be used as single expansive agent), concrete Disadvantages of large slump loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] High-alumina clinker, kaolin and anhydrite are selected as expansion components, and the high-alumina clinker is calcined in a rotary kiln, and the calcined metakaolin and anhydrite are ball milled together in a ball mill in proportion. When the fineness reaches 0.08 and the balance of the square hole sieve is less than 10%, the material is discharged, and then a certain proportion of plasticizer, slump retaining agent and retarder are added and mixed evenly at high speed to form a multi-functional low-alkali and low-mix expansion agent.

[0021] The high-alumina clinker used in the above raw materials is preferably CA>36%, CA 2 >12, CaO2 o 3 ≥43% metakaolin. Anhydrite with SO 3 >53% anhydrite, plasticizer is polycarboxylate water reducer, preferably polycarboxylate modified naphthalene water reducer; slump retaining agent is higher fatty alcohol derivative, preferably JX-F Modified air-entraining agent, retarder is potassium gluconate.

[0022] Taking 100Kg multi-f...

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PUM

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Abstract

The multi-functional bloater with low alkali and low mixing disclosed, use lots of material like high alumina chamotte, meta kaolin and anhydrite as components of bloater, place high alumina chamotte after burning in rotary kiln and meta kaolin and anhydrite after burning into ball mill, with a certain ratio, and add fluxing agent, and retarder after ball ring, obtaining the products after average mixing. Its alkali content is not larger than 0.18% and the the quality of mixing is 6%, the bloating rateis stable, strength of concrete can be increased by more than 20%, it has low comprehensive cost, multiple functions such as bloating, pumping, delayed coagulation and freeze proof, less loss of concrete, long period for storage and decreased engineering price.

Description

technical field [0001] The invention relates to a concrete admixture. To be precise, it is a multifunctional low-alkali and low-mixing expansion agent that uses various expansion components to jointly compensate for concrete shrinkage, improve concrete strength, frost resistance, and durability. Background technique [0002] In order to solve the problem of concrete cracking due to shrinkage, one is to develop expansive cement, such as in Europe and the United States, and the other is to develop cement admixture-expansion agent, such as in my country and Japan, various kinds of expansion agents with gypsum and alum stone as expansion components. Expanding agent has been successfully applied in our country for more than 20 years. [0003] Another important cause of concrete cracking is alkali-aggregate reaction. The so-called chemical reaction between cement and admixtures or alkali in the environment and harmful components in aggregates such as sand and stones causes concre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/08C04B24/04C04B24/08C04B24/10
Inventor 高翊杰
Owner 高翊杰
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