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Self-compacting lightweight aggregate machine-made sand concrete and preparation method thereof

A lightweight aggregate and machine-made sand technology, which is applied in the field of lightweight aggregate concrete, can solve the problems of tight supply of natural sand, high concrete water demand, and easy floating of aggregate, so as to solve the problem of tight supply, easy floating, and demand The effect of high water

Inactive Publication Date: 2019-09-17
中建西部建设贵州有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use machine-made sand instead of natural sand to solve the problems of easy floating of light aggregate concrete aggregate, tight supply of natural sand and high water demand, easy segregation and poor pumpability of light aggregate machine-made sand concrete

Method used

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  • Self-compacting lightweight aggregate machine-made sand concrete and preparation method thereof
  • Self-compacting lightweight aggregate machine-made sand concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0023] Embodiment 1-5, the ratio of comparative example 1-2 is as follows:

[0024]

[0025] in:

Embodiment 1

[0026] In Example 1, the slump-preserving agent is compounded with isopentenol polyoxyethylene ether TPEG, acrylic acid and a composite molecular weight regulator in a ratio of 15:5:2, and the air-entraining agent is obtained by compounding rosin, caustic soda, triethanolamine, dodecane Sodium base sulfate is obtained by compounding in a ratio of 5:10:5:20;

Embodiment 2

[0027] In Example 2, the slump-preserving agent is compounded with isopentenol polyoxyethylene ether TPEG, acrylic acid and a composite molecular weight regulator in a ratio of 20:10:5, and the air-entraining agent is obtained by using rosin, caustic soda, triethanolamine, dodecane Sodium base sulfate is obtained by compounding in a ratio of 1:1:15:10;

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Abstract

The invention discloses self-compacting lightweight aggregate machine-made sand concrete. The sand concrete comprises the following raw materials in parts by weight: 260-330 parts of concrete, 140-160 parts of fly ash, 30-40 parts of mineral powder, 20-40 parts of silica fume, 420-500 parts of machine-made sand, 100-110 parts of light sand, 360-400 parts of lightweight aggregate, 150-160 parts of water, 6.8-8.3 parts of a water reducer, 0.45-2.8 parts of a slump preserving agent and 0.18-0.22 part of an air entraining agent, wherein the slump preserving agent is obtained by compounding isopentenol polyoxyethylene ether (TPEG), acrylic acid and a compound molecular weight regulator, the air entraining agent is a rosin soap type air entraining agent obtained by compounding rosin, caustic soda, triethanolamine and sodium lauryl sulfate. The machine-made sand is used to replace natural sand, and the concrete prepared by a secondary mixing method solves the problems of easy flotation of lightweight aggregate concrete aggregate, shortage of natural sand supply, and high water demand rate, easy separation and poor pumpability of lightweight aggregate machine-made sand concrete.

Description

technical field [0001] The invention relates to a lightweight aggregate concrete, and specifically provides a self-compacting lightweight aggregate machine-made sand concrete and a preparation method thereof. Background technique [0002] Concrete plays an irreplaceable role in building materials. With the continuous deepening of people's understanding of concrete materials and the continuous development of concrete technology, the requirements for concrete are not limited to strength. Functional development. Lightweight, high-strength, high-performance concrete has gradually become the focus of research. Lightweight aggregate concrete is made of lightweight aggregate with low apparent density and appropriate cementitious materials. Due to the internal porous characteristics of lightweight aggregate, the apparent density of aggregate can be reduced to a certain extent to achieve the purpose of reducing the concrete bulk density. . The porosity of lightweight aggregate its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/10
CPCC04B28/04C04B2201/52C04B2201/50C04B2201/20C04B18/08C04B18/12C04B18/146C04B14/06C04B2103/302C04B18/027C04B2103/308C04B24/34C04B22/062C04B24/122C04B24/16C04B38/10
Inventor 路东义林喜华赵士豪叶鸿宏班录江何凯何欣
Owner 中建西部建设贵州有限公司
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