High stability concrete accelerator

A high-stability, quick-setting agent technology, applied in the field of high-stability quick-setting agents for concrete, can solve problems such as unfavorable storage of construction accelerators, reduction of concrete durability, and easy precipitation and precipitation, so as to facilitate popularization and use, improve The effect of stability and reasonable ratio of raw materials

Inactive Publication Date: 2019-03-15
安徽恒远管桩有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of the commonly used alkali-containing accelerator is sodium metaaluminate, which is a supersaturated solution with poor stability. It is easy to precipitate and precipitate in a low temperature environment or after a long storage time, which is not conducive to the construction in a low temperature environment and the storage of the accelerator.
[0004] In addition, the alkaline substances in the alkali-containing accelerator will chemically react with certain active minerals (activated silica, activated alumina, etc.) in the concrete aggregate to generate swelling substances (or water-swelling substances) that cause internal The phenomenon of cracking due to self-expansion stress, thereby reducing the durability of concrete

Method used

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  • High stability concrete accelerator

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Embodiment 1

[0020] A high-stability accelerator for concrete is characterized in that it is made of the following raw materials in parts by weight: 40 parts of polyglutamic acid, 5 parts of adsorbent, 5 parts of calcium sulfate, 2 parts of polyaspartic acid, 3 parts of emulsifier, 2 parts of sodium gluconate, 1 part of crospovidone, 2 parts of aluminum oxide, 2 parts of ascorbic acid, 2 parts of potassium methyl silicate, 0.2 part of sodium lauryl sulfate.

[0021] The adsorbent is made of zeolite powder, activated carbon powder, rice straw, and alum according to the mass ratio of 1:1:1.5:0.5, and the production method is as follows: put the rice straw into a drying oven at 120° C. More than 2%, crushed into 40-mesh powder, add appropriate amount of water and stir evenly until muddy paste, then put into carbonization furnace at 400°C for carbonization for 1 hour, take it out and cool, and crush into 60-mesh powder to obtain carbonized powder; dissolve alum in Appropriate amount of water, ...

Embodiment 2

[0029] A high-stability accelerator for concrete is characterized in that it is made of the following raw materials in parts by weight: 50 parts of polyglutamic acid, 10 parts of adsorbent, 8 parts of calcium sulfate, 6 parts of polyaspartic acid, 5 parts of emulsifier, 4 parts of sodium gluconate, 3 parts of crospovidone, 4 parts of aluminum oxide, 4 parts of ascorbic acid, 4 parts of potassium methyl silicate, and 1.5 parts of sodium lauryl sulfate.

[0030] The adsorbent is made of zeolite powder, activated carbon powder, rice straw, and alum according to the mass ratio of 1:1:1.5:0.5, and the production method is as follows: put the rice straw into a drying oven at 140° C. more than 2%, crushed into 50-mesh powder, added appropriate amount of water and stirred evenly until muddy paste, then put into carbonization furnace at 500°C for carbonization for 2 hours, took it out and cooled it and crushed into 70-mesh powder to obtain carbonized powder; dissolve alum in Appropriat...

Embodiment 3

[0038] A high-stability accelerator for concrete is characterized in that it is made of the following raw materials in parts by weight: 60 parts of polyglutamic acid, 15 parts of adsorbent, 10 parts of calcium sulfate, 10 parts of polyaspartic acid, 6 parts of emulsifier, 5 parts of sodium gluconate, 5 parts of crospovidone, 5 parts of aluminum oxide, 6 parts of ascorbic acid, 5 parts of potassium methyl silicate, and 2 parts of sodium lauryl sulfate.

[0039] The adsorbent is made of zeolite powder, activated carbon powder, rice straw, and alum according to the mass ratio of 1:1:1.5:0.5, and the production method is as follows: put the rice straw into a drying oven at 150° C. more than 2%, crushed into 60-mesh powder, add appropriate amount of water and stir evenly until muddy paste, then carbonize in a carbonization furnace at 600°C for 3 hours, take it out and cool and crush into 60-80-mesh powder to obtain carbonized powder; Dissolve in an appropriate amount of water, conc...

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Abstract

The invention provides a high stability concrete accelerator and relates to the technical field of building material preparation. A technical flow is concise; a raw material proportion is reasonable;the accelerator is prepared from nontoxic and innocuous chemical substances; raw materials are low in price; and the prepared high stability concrete accelerator is good in accelerating effect, high in stability, strong in applicability, obvious in use effect, high in market value and convenient to popularize and use.

Description

technical field [0001] The invention relates to the technical field of building material preparation, in particular to a high-stability quick-setting agent for concrete. Background technique [0002] Shotcrete is a construction method of spraying and pouring fine stone concrete with a pressure spray gun. It is often used for pouring tunnel linings, walls, ceilings and other thin-walled structures or linings of other structures and protective layers of steel structures. Shotcrete is to put pre-prepared cement, sand, gravel, water and a certain amount of admixture into the sprayer, use high-pressure air to send it to the nozzle and mix it with the accelerator, and spray it to the rock at a high speed. or concrete surface. [0003] At present, accelerators are usually alkali-containing accelerators, among which aluminate accelerators are relatively effective in wet-mix shotcrete projects, and the setting time is shorter than that of alkali-free accelerators. The main componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/12
CPCC04B40/0039C04B2103/12C04B22/143C04B24/287C04B24/10C04B22/06C04B24/42C04B24/16C04B24/045C04B24/2652C04B24/24C04B14/022C04B14/047C04B22/148
Inventor 霍正淮杜君桥
Owner 安徽恒远管桩有限公司
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