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Method for preparing environment-friendly thermal-insulation building block from construction waste

A technology for thermal insulation blocks and construction waste, applied in the field of building materials, can solve the problems of narrow waste utilization range, low waste utilization rate, low heat resistance temperature, etc., so as to reduce curing time and steam curing time, protect the environment, and improve strength. Effect

Active Publication Date: 2014-12-10
广西壮族自治区建筑科学研究设计院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it uses waste aerated concrete blocks, and the range of waste utilization is narrow and relatively single.
[0008] The blocks reported in the above documents are either poor in safety, especially organic polymer materials such as polyphenylene, which have a low heat resistance temperature and are easy to burn, or have complex processes, low waste utilization rate, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An example of the method of using construction waste to prepare environmentally friendly thermal insulation blocks according to the present invention includes the following steps: firstly drying the blast furnace slag and construction waste through a dryer, controlling the moisture content within 0.5%, and grinding them to fineness through a mill Its fineness is controlled at 200 mesh.

[0040]180kg of ordinary Portland cement with a strength grade of 42.5 accounts for 10% of the total raw material quality, 540kg of processed blast furnace slag accounts for 30% of the total raw material quality, 486kg of pozzolan ash accounts for 27% of the total raw material quality, and the processed construction waste 144kg accounts for 8% of the total raw material mass, 450kg of 1-5mm ceramsite accounts for 25% of the total raw material, add them together to the mixer and mix evenly, then add 1080kg of water, stir for 5-10min, add 450kg of the total raw material 0.8% special additiv...

Embodiment 2

[0042] Another example of the method of using construction waste to prepare environmentally friendly thermal insulation blocks according to the present invention includes the following steps: firstly drying blast furnace slag and construction waste through a dryer, controlling the moisture content within 0.5%, and grinding them through a mill Finely control its fineness at 200 mesh.

[0043] Take 450kg of ordinary Portland cement with a strength grade of 42.5 to account for 25% of the total raw material quality, 360kg of processed blast furnace slag to account for 20% of the total raw material quality, volcanic ash to 0kg, and 180kg of processed construction waste to account for 25% of the total raw material quality 10%, 1-5mm ceramsite 810kg accounts for 45% of the total raw material, add them together to the mixer and mix evenly, then add 1170kg of water, stir for 5-10min, add 1.2% of the total raw material The special additive 21.6 kg, continue to stir for 0.5-1min, pour in...

Embodiment 3

[0045] Another example of the method of using construction waste to prepare environmentally friendly thermal insulation blocks according to the present invention includes the following steps: first drying the blast furnace slag and construction waste through a dryer, controlling the moisture content within 0.5%, and grinding them through a mill Finely control its fineness at 200 mesh.

[0046] 180kg of ordinary Portland cement with a strength grade of 42.5 accounts for 10% of the total raw material mass, 540kg of treated blast furnace slag accounts for 30% of the total raw material mass, 540kg of pozzolan ash accounts for 30% of the total raw material mass, and the treated building 144kg of waste material accounts for 8% of the total raw material mass, and 396kg of ceramsite with 1-5mm accounts for 22% of the total raw material amount. They are added to the mixer and mixed evenly, then 1260kg of water is added and stirred for 5-10min. 0.8% special additive 14.4kg, continue to ...

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Abstract

The invention relates to a method for preparing an environment-friendly thermal-insulation building block from construction waste, which comprises the following steps: uniformly mixing cement, active mineral admixture, haydite and construction waste in a weight ratio of (8-25):(20-60):(20-45):(8-15), adding water, pulping and stirring for 5-10 minutes, adding a special additive which accounts for 0.8-1.5 wt% of the dry powder, and stirring for 0.5-1 minute; and preparing a slurry, injecting into a specimen mold, standing in a 55 DEG C constant-temperature steam curing chamber, curing for 4 hours, demolding, cutting with a steel wire, sending into an autoclave, heating and pressurizing for 8 hours, and discharging to obtain the thermal-insulation building block. The density of the thermal-insulation building block is 500-700 kg / m<3>, the heat conductivity coefficient is less than or equal to 0.16 W / m.K, and the compression strength is greater than or equal to 5 MPa. By using the construction waste instead of part of the active mineral admixture and the haydite as the component, the method achieves the effects of protecting the environment, enhancing the cyclic utilization efficiency of resources and lowering the cost.

Description

1. Technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing environmentally friendly thermal insulation blocks by using construction waste materials. 2. Background technology [0002] The energy consumption of buildings is very huge, and the development of new wall materials to reduce the energy loss of building envelopes is one of the main measures to improve the energy efficiency of buildings. New wall materials refer to the use of local mineral raw materials and industrial waste resources through advanced preparation techniques and processing methods to make various energy-saving building materials with multiple functions that meet the requirements of modern buildings. Compared with traditional wall materials, its main features are light weight, high strength, heat preservation, energy saving and durability. [0003] New wall materials can be divided into three categories: blocks, bricks and plates...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16
CPCY02W30/91
Inventor 朱惠英朱教群周维周卫兵卢凌寰孙正宾龙梁凯杨阳
Owner 广西壮族自治区建筑科学研究设计院
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