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A glass fiber reinforced cement material prepared from waste concrete

A technology of waste concrete and reinforced cement, which is applied in the field of building materials, can solve the problems of consumption of natural resources, difficult bending strength, compressive strength and impact strength, unfavorable environmental protection, etc., and achieves simple preparation process, excellent performance, and frost resistance. excellent effect

Active Publication Date: 2021-05-04
国检测试控股集团北京有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of natural sand consumes a lot of natural resources and is not good for environmental protection
[0005] Waste concrete is a kind of solid waste. It is a solid waste produced by demolition of buildings due to reaching the service life or aging. Its performance indicators such as hardness, strength and water absorption are far from the performance indicators of natural quartz sand. When using it to replace natural sand and stone to prepare glass fiber reinforced cement materials, it is difficult to prepare materials that meet the technical requirements for bending strength, compressive strength and impact strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A glass fiber reinforced cement material prepared by using waste concrete, the composition ratio is: rapid hardening sulfoaluminate cement, quartz sand, waste concrete particles, water, water reducing agent, coagulation regulator, polymer solution , The weight ratio of alkali-resistant glass fiber is 38:32.58:5.75:15.2:0.45:0.12:3.14:4.76;

[0029] Among them, the water reducer is polycarboxylic acid high-performance water reducer; the coagulation regulator is potassium sodium tartrate; the polymer solution is water-based acrylate copolymer emulsion; the alkali-resistant glass fiber is alkali-resistant glass fiber roving, the fiber diameter 16μm, the fiber length is 21mm;

[0030] It is prepared by the following method:

[0031] (1) Crushing and processing the natural quartz stone into particles with a particle size of less than 2mm for use; crushing and processing the waste concrete produced by building demolition into particles with a particle size of less than 3mm a...

Embodiment 2

[0036] A glass fiber reinforced cement material prepared by using waste concrete, the composition ratio is: rapid hardening sulfoaluminate cement, quartz sand, waste concrete particles, water, water reducing agent, coagulation regulator, polymer solution , The weight ratio of alkali-resistant glass fiber is 42:25.2:10.8:13.86:0.47:0.12:3.15:4.40;

[0037] Among them, the water reducer is polycarboxylic acid high-performance water reducer; the coagulation regulator is potassium sodium tartrate; the polymer solution is water-based acrylate copolymer emulsion; the alkali-resistant glass fiber is alkali-resistant glass fiber roving, the fiber diameter 25μm, the fiber length is 34mm;

[0038] It is prepared by the following method:

[0039] (1) Crushing and processing the natural quartz stone into particles with a particle size of less than 3mm for use; crushing and processing the waste concrete produced by building demolition into particles with a particle size of less than 4mm a...

Embodiment 3

[0044] A glass fiber reinforced cement material prepared by using waste concrete, the composition ratio is: rapid hardening sulfoaluminate cement, quartz sand, waste concrete particles, water, water reducing agent, coagulation regulator, polymer solution , The weight ratio of alkali-resistant glass fiber is 45:17.25:14.11:15.75:0.49:0.12:3.16:4.12;

[0045] Among them, the water reducer is polycarboxylic acid high-performance water reducer; the coagulation regulator is potassium sodium tartrate; the polymer solution is water-based acrylate copolymer emulsion; the alkali-resistant glass fiber is alkali-resistant glass fiber roving, the fiber diameter 36μm, the fiber length is 40mm;

[0046] It is prepared by the following method:

[0047] (1) Crushing and processing the natural quartz stone into particles with a particle size of less than 4mm for use; crushing and processing the waste concrete produced by building demolition into particles with a particle size of less than 5mm...

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Abstract

The invention discloses a glass fiber reinforced cement material prepared by using waste concrete, comprising the following components: 35-50 parts of cement, 10-50 parts of quartz sand, 5-50 parts of waste concrete particles, 10-50 parts of 20 parts of water, 0.1-2 parts of water reducing agent, 0.1-1 part of coagulation modifier, 1-5 parts of high molecular polymer solution and 3-6 parts of alkali-resistant glass fiber. The cement is fast-hardening sulfoaluminate cement; the fiber is alkali-resistant glass fiber roving; the water reducing agent is a polycarboxylate superplasticizer, and the high molecular polymer solution For acrylate copolymer emulsion. The glass fiber reinforced cement material of the invention has the characteristics of high bending strength, high impact resistance and high frost resistance, and is suitable for preparing high-quality prefabricated building boards. The invention provides the preparation method of the glass fiber reinforced cement material for preparing high-quality prefabricated building boards from the waste concrete.

Description

technical field [0001] The invention relates to a cement-based composite material, which is a glass fiber-reinforced cement material and its preparation method, in particular to a glass fiber-reinforced cement material for high-quality assembled building panels prepared by using waste concrete and its preparation method, which belongs to construction field of materials technology. Background technique [0002] Prefabricated buildings refer to buildings assembled on site with prefabricated components. The advantages of this kind of buildings are fast construction speed, less restricted by climatic conditions, saving labor and improving construction quality. The prefabricated building prepares the required components according to the site requirements and performs on-site installation. Wall panels are one of the important parts of prefabricated buildings and are widely used. Fiber cement boards are the key components of prefabricated building wall panels. [0003] Glass fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B18/16
CPCC04B18/16C04B28/06C04B2201/50C04B14/06C04B2103/302C04B2103/0068C04B24/2641C04B14/44C04B24/24C04B24/06Y02W30/91
Inventor 张利俊秦宪明刘佳王灵秀项斌峰裴超邱洪华刘新状蔡素燕
Owner 国检测试控股集团北京有限公司