Powdery alkali-free quick-coagulant

A kind of quick-setting agent, powdery technology, applied in the field of powdery non-alkali quick-setting agent, can solve the problems of low concrete strength, water leakage of structures, short service life, etc., achieve stable durability, reduce chemical corrosion, and precipitate rate reduction effect

Inactive Publication Date: 2007-05-30
王衡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problems of the existing quick-setting agent and the concrete and mortar made of it, which have a high alkali content, which in turn causes low concrete strength, water leakage and short service life of structures built with concrete and other raw materials, and provides a powder non-alkali accelerator

Method used

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Examples

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Effect test

Embodiment 1

[0018] Embodiment 1: Wherein 1 part is 1 gram

[0019] The powdery alkali-free quick-setting agent is made of the following raw materials in weight ratio: 3 grams of sodium silicate, 2 grams of sodium aluminate, 10 grams of aluminum sulfate, 2 grams of hydroxycarboxylic acid, and 1 gram of pull-off powder. First, mix sodium silicate and sodium aluminate in proportion and grind them, and pass through a standard sieve with a fineness of 300 mesh; then mix aluminum sulfate and hydroxycarboxylic acid in proportion, grind them, and pass through a standard sieve with a fineness of 300 mesh; finally The raw materials obtained in the above steps are mixed with the pull-off powder in proportion, then ground, passed through a standard sieve with a fineness of 300 mesh, and the finished product with a sieve residue of less than 5% is qualified, and packed into a lined woven bag. Add the obtained quick-setting agent into conventional concrete at 1% of the weight of the cement, stir evenly...

Embodiment 2

[0020] Embodiment 2: Wherein 1 part is 1 kilogram

[0021] The powdery alkali-free quick-setting agent is made of the following raw materials in weight ratio: 8 kg of sodium silicate, 8 kg of sodium aluminate, 26 kg of aluminum sulfate, 10 kg of hydroxycarboxylic acid, and 3 kg of pull-off powder. First, mix sodium silicate and sodium aluminate in proportion and grind them, and pass through a standard sieve with a fineness of 300 mesh; then mix aluminum sulfate and hydroxycarboxylic acid in proportion, grind them, and pass through a standard sieve with a fineness of 300 mesh; finally The raw materials obtained in the above steps are mixed with the pull-off powder in proportion, then ground, passed through a standard sieve with a fineness of 300 mesh, and the finished product with a sieve residue of less than 5% is qualified, and packed into a lined woven bag. Add the obtained quick-setting agent into conventional concrete at 2% of the cement weight, stir evenly, and promote th...

Embodiment 3

[0022] Embodiment 3: Wherein 1 part is 1 kilogram

[0023] The powdery alkali-free quick-setting agent is made of the following raw materials in weight ratio: 5 kg of sodium silicate, 6 kg of sodium aluminate, 20 kg of aluminum sulfate, 8 kg of hydroxycarboxylic acid, and 2 kg of pull-off powder. First, mix sodium silicate and sodium aluminate in proportion and grind them, and pass through a standard sieve with a fineness of 300 mesh; then mix aluminum sulfate and hydroxycarboxylic acid in proportion, grind them, and pass through a standard sieve with a fineness of 300 mesh; finally The raw materials obtained in the above steps are mixed with the pull-off powder in proportion, then ground, passed through a standard sieve with a fineness of 300 mesh, and the finished product with a sieve residue of less than 5% is qualified, and packed into a lined woven bag. Add the obtained quick-setting agent into conventional concrete at 1.4% of the cement weight, and stir evenly to promote...

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Abstract

The invention discloses a powder-shaped alkali-free accelerator, which comprises the following parts: 3-8% sodium silicate, 2-8% sodium aluminate, 10-26% aluminum sulfate, 2-10% hydroxy carboxylic acid and 1-3% zipper powder, wherein the pH value of accelerator is 6 without alkali, which makes concrete condense rapidly within short time to improve strength; the evolution rate of alkaline reduces greatly when the pH value of concrete is 9, which reduces chemical corrosivity; the component strength of concrete with the accelerator is improved by 15-25% with impervious property more than S20 and stable durability. The invention lengthens the using lifetime of concrete building, which is fit for supporting and salvaging project such as tunnel, well and bridge.

Description

technical field [0001] The invention relates to an accelerator in the technical field of building materials, in particular to a powdery alkali-free accelerator suitable for spraying quick-setting concrete, mortar, cement paste and the like. Background technique [0002] At present, in the construction of underground engineering and some surface engineering, the amount of sprayed quick-setting concrete, mortar, and cement slurry is increasing day by day. It solidifies and hardens quickly in a very short period of time, improving strength, reducing rebound and slumping, and shortening the construction period. Due to the fast setting speed and rapid strength development of concrete mixed with accelerators, it will inevitably have a certain impact on the microstructure of concrete, thereby reducing its strength. The current national standard stipulates that the strength of concrete mixed with accelerators must reach that without 80% of those, but the strength of the existing ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/08C04B22/14C04B24/06
CPCC04B40/0039
Inventor 王衡
Owner 王衡
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