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Aerated concrete preparation method based on solid waste resource utilization

A technology of aerated concrete and resource utilization, applied in applications, household utensils, ceramic products, etc., to achieve the effects of ensuring product quality, reducing occupation, and saving non-renewable resources

Pending Publication Date: 2020-06-16
ANHUI GAODI BUILDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the environmental and energy problems caused by the use of natural sand resources in autoclaved aerated concrete in the prior art, the present invention provides a method for preparing aerated concrete based on the utilization of solid waste resources. The aerated concrete is made of silicon tailings And iron tailings sand as the main siliceous material, sludge and waste slurry as the secondary siliceous material, lime and cement as the calcareous material, aluminum powder paste as the gas-generating agent, and desulfurized gypsum as the regulator of the coagulation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) First, use a constant temperature water bath to heat the water until the water temperature reaches about 40°C for later use. Put 20 parts of dry material silicon tailings, 35 parts of iron tailings, 1 part of sludge, 10 parts of waste slurry, and 0.05 parts of titanium dioxide according to a certain amount. The ratio is added to the dispersion tank in turn and dispersed at high speed for 2 minutes; then add hot water at about 40°C and continue to stir for 5 minutes, then add 10 parts of cement, 20 parts of lime, and 4 parts of desulfurized gypsum and stir for 1 minute. Then add 0.05 parts of aluminum powder paste and stir quickly for 20 seconds. Finally, quickly pour the stirred slurry into the plastic mold (the mold size is 3*(150mm×150mm×150mm)), and the height of the pouring mold is 3 / 4. ; Preheat the mold at 30°C for 30 minutes before pouring;

[0046] (2) After the mold is poured, immediately put it into a constant temperature and humidity box for 2 hours of ga...

Embodiment 2

[0050] (1) First, use a constant temperature water bath to heat the water until the water temperature reaches about 60°C for later use. Put 30 parts of dry material silicon tailings, 25 parts of iron tailings, 5 parts of sludge, 5 parts of waste slurry, and 0.01 parts of titanium dioxide according to a certain amount. The ratio is added to the dispersion tank in turn and dispersed at high speed for 5 minutes; then add hot water at about 60°C and continue to stir for 2 minutes, then add 19 parts of cement, 15 parts of lime, and 1 part of desulfurized gypsum and stir for 3 minutes. Then add 0.1 part of aluminum powder paste and stir quickly evenly for 40 seconds, and finally pour the stirred slurry into the plastic mold (the mold size is 3*(150mm×150mm×150mm)), pouring the height of 2 / 3 of the mold ; Preheat the mold at 40°C for 10 minutes before pouring;

[0051] (2) After the mold is poured, immediately put it into a constant temperature and humidity box for 3 hours of gas gen...

Embodiment 3

[0055] (1) First, use a constant temperature water bath to heat the water until the water temperature reaches about 50°C for later use. Put 25 parts of silicon tailings, 30 parts of iron tailings, 3 parts of sludge, 7 parts of waste slurry, and 0.03 parts of titanium dioxide into a certain amount of Add the ratio to the dispersion tank in turn and disperse at a high speed for 3 minutes; then add hot water at about 50°C and continue stirring for 3 minutes, then add 15 parts of cement, 19 parts of lime, and 1 part of desulfurized gypsum and stir for 3 minutes. Then add 0.08 parts of aluminum powder paste and stir quickly for 35 seconds. Finally, quickly pour the stirred slurry into the plastic mold (the mold size is 3*(150mm×150mm×150mm)), and the height of the pouring mold is 2 / 3 ; Preheat the mold at 40°C for 15 minutes before pouring;

[0056] (2) After the mold is poured, immediately put it into a constant temperature and humidity box for 2.5 hours of gas generation and stat...

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Abstract

The invention discloses an aerated concrete preparation method based on solid waste resource utilization, which comprises the following steps: (1) sequentially adding dry materials silicon tailing mud, iron tailing sand, sludge, waste slurry and titanium dioxide into a dispersion cylinder according to a certain proportion, dispersing at a high speed, sequentially adding cement, lime and desulfurized gypsum, adding aluminum powder paste, quickly stirring uniformly, and pouring; (2) after pouring is completed, performing gas-forming static-stop maintenance and (3) demoulding and carrying out high-temperature steam curing. According to the aerated concrete disclosed by the invention, the silicon tailing mud and the iron tailing sand are used as main siliceous materials, the sludge and the waste slurry are used as secondary siliceous materials, the lime and the cement are used as calcareous materials, the aluminum powder paste is used as a gas-forming agent, and the desulfurized gypsum isused as a regulator of a coagulation process. Compared with the prior art, the autoclaved aerated concrete is prepared by taking industrial by-products such as the silicon tailing mud, the iron tailing sand, desulfurized gypsum and the like as main materials, meanwhile, the comprehensive utilization way of the industrial by-products is expanded, and the circular economy and sustainable developmentconcept of the material is enhanced.

Description

technical field [0001] The invention belongs to the field of new building materials, and in particular relates to a method for preparing aerated concrete based on solid waste resource utilization. Background technique [0002] Construction is an important sector that consumes a lot of energy and resources. A large proportion of high energy consumption buildings will cause excessive energy burden and serious environmental pollution. With the energy-saving orientation of "low carbon" and "four festivals and one environmental protection", it has become an inevitable trend to vigorously promote the innovation of wall panels and the promotion of energy-saving buildings. In the implementation process of banning the use of clay bricks in the construction industry, a large number of non-clay wall materials have emerged. Autoclaved aerated concrete is one of the most widely used new environmental protection wall materials suitable for building energy saving at home and abroad. Buil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/40
CPCC04B28/144C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B2111/00017C04B18/0427C04B18/12C04B18/0418C04B14/305C04B7/00C04B14/28C04B22/04C04B38/02C04B40/0245
Inventor 田野刘玉亭代义磊陈传明马春平陈刚胡成朔刘文博杨思清
Owner ANHUI GAODI BUILDING MATERIAL CO LTD
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