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Lightweight thermal insulation board prepared from construction waste recycled fine powder and preparation method thereof

A technology for recycling fine powder and construction waste, which is applied in the recycling of waste resources and the field of green building materials, can solve the problems of not being able to comprehensively utilize construction waste, not being able to play a role in strengthening aggregates, and destroying the overall structure of cement, etc., to achieve Accelerate the alkali excitation speed, improve product market competitiveness, and improve the effect of foaming effect

Active Publication Date: 2017-12-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although some research has been done on the preparation of lightweight insulation materials from construction waste, there are still many problems to be solved, such as the low activity of pozzolanic materials in construction waste, which cannot be combined with Ca(OH) in cement. 2 The reaction produces cementitious materials such as calcium silicate hydrate and calcium aluminate hydrate. At the same time, the construction waste is ground very thinly, which cannot play the role of aggregate reinforcement. It will only destroy the overall structure of cement and reduce the strength of cement.
In addition, in the existing research, the amount of construction waste is very low, which cannot clearly achieve the purpose of comprehensive utilization of construction waste
[0005] In addition, the current lightweight insulation materials use cement as the cementitious material, and the production process of cement consumes a lot of energy and produces greenhouse gas CO 2 , which is inconsistent with the current advocated green development

Method used

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  • Lightweight thermal insulation board prepared from construction waste recycled fine powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, a kind of method that prepares novel light-weight heat-insulation board with construction waste regenerated fine powder:

[0033] The formula is: construction waste regenerated fine powder (through 80 mesh sieve, sieve residue ≤ 5%, SiO in chemical composition 2 、Al 2 o 3 50 parts of sodium silicate water glass (modulus 1.5, Baume degree 50°Bé), 20 parts of slag (S95 grade), 3 parts of industrial hydrogen peroxide (concentration 38%), stearic acid Calcium 0.2 parts, water 50 parts.

[0034] Industrial hydrogen peroxide is used as a foaming agent, and calcium stearate is used as a foam stabilizer.

[0035] The production process is to carry out the following steps in sequence:

[0036] (1) Add solid raw materials such as construction waste regenerated fine powder, slag, and foam stabilizer to the mixing tank according to the amount, mix for 5 minutes, and rotate at 200 rpm;

[0037] (2) Add water glass and water to the resultant of step (1), add foamin...

Embodiment 2

[0041]Embodiment 2, a kind of method that prepares novel light-weight heat-insulation board with the regenerated fine powder of construction waste:

[0042] The formula is: construction waste regenerated fine powder (through 80 mesh sieve, sieve residue ≤ 5%, SiO in chemical composition 2 、Al 2 o 3 Content sum 60%) 100 parts; Sodium silicate water glass (modulus 1.2, Baume degree 50°Bé) 10 parts, slag (S95 grade) 40 parts, industrial hydrogen peroxide (concentration 38%) 5 parts, stearic acid Sodium 0.5 parts, water 70 parts.

[0043] Industrial hydrogen peroxide is used as a foaming agent, and sodium stearate is used as a foam stabilizer.

[0044] Production process is equal to embodiment 1.

[0045] Sheet properties: dry apparent density 700kg / m 3 , compressive strength 5MPa, thermal conductivity 0.11W / (m·K).

Embodiment 3

[0046] Embodiment 3, a kind of method that prepares novel light-weight heat-insulation board material with regenerated fine powder of construction waste:

[0047] The formula is: construction waste regenerated fine powder (through 80 mesh sieve, sieve residue ≤ 5%, SiO in chemical composition 2 、Al 2 o 3 Content sum 65%) 100 parts; Sodium silicate water glass (modulus 1.0, Baume degree 40°Bé) 15 parts, slag (S95 grade) 50 parts, industrial hydrogen peroxide (concentration 38%) 4 parts, stearic acid Sodium 0.4 parts, water 80 parts.

[0048] Industrial hydrogen peroxide is used as a foaming agent, and sodium stearate is used as a foam stabilizer.

[0049] Production process is equal to embodiment 1.

[0050] Sheet properties: dry apparent density 600kg / m 3 , compressive strength 6MPa, thermal conductivity 0.08W / (m·K).

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Abstract

The invention discloses a light-weight heat insulation plate prepared from building rubbish regeneration fine powder. The light-weight heat insulation plate is prepared from the following ingredients in parts by weight: 100 parts of building rubbish regeneration fine powder, 5 to 15 parts of water glass, 20 to 50 parts of mine slag, 3 to 5 parts of foaming agents, 0.2 to 0.5 part of foam stabilizing agents and 50 to 100 parts of water, wherein the building rubbish regeneration fine powder passes through a 80-mesh sieve, the sieving residue is smaller than or equal to 5 percent, and the content sum of SiO2 and Al2O3 in chemical components is greater than or equal to 50 percent; the water glass is sodium silicate water glass; the mine slag is mine slag conforming to S95-stage standard requirements in granulated blast-furnace slag used in cement and concrete (GB / T18046-2000); the foaming agent is hydrogen peroxide; the foam stabilizing agent is calcium stearate or sodium stearate. The invention also discloses a preparation method of the light-weight heat insulation plate.

Description

technical field [0001] The invention relates to a method for preparing a novel light-weight thermal insulation board by using regenerated fine powder of construction waste, and belongs to the fields of waste resource recycling and green building materials. Background technique [0002] With the continuous development of urbanization and urban construction in China, the speed of infrastructure construction is accelerating, and the output of construction waste is also growing rapidly. The National Development and Reform Commission issued the "Implementation Plan for Comprehensive Utilization of Bulk Solid Waste" in December 2011, showing that my country's construction waste output was 400 million tons in 2005, and 800 million tons in 2010, and it is still in a stage of rapid growth. Construction waste will pollute the environment, waste land, and destabilize the city. Therefore, it is very important to use construction waste as a resource. [0003] Lightweight insulation boar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26C04B38/02C04B18/14C04B18/16C04B22/06C04B24/04C04B111/40
CPCC04B28/26C04B2111/40C04B18/16C04B18/141C04B22/068C04B24/04C04B38/02Y02W30/91
Inventor 汪海风张鹤徐意丁新更杨辉
Owner ZHEJIANG UNIV
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