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A kind of lightweight building insulation block and preparation method thereof

A building insulation and building block technology, which is applied in the field of building materials, can solve the problems of increasing energy consumption and manufacturing costs, and achieve the effects of reducing production energy consumption, simple and easy operation of equipment, and low cost

Active Publication Date: 2018-10-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air-entrained concrete block contains a large number of uniform and fine pores after gasification, so as to realize the performance of light weight, porous, heat preservation and heat insulation. Generally, the high-temperature steam curing process is essential to promote the reaction of silicon-calcium, but it increases energy consumption and manufacturing cost

Method used

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  • A kind of lightweight building insulation block and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , The formula (mass ratio) of each component for preparing the thermal insulation block: 50wt% of calcium silicate slag, 20wt% of fly ash, 10wt% of cotton fiber, and 20wt% of cement. After accurately weighing each material, put the silicon-calcium slag in a mixer, add water and stir according to the liquid-solid ratio of 20mL / g, gradually add the weighed fly ash, cotton fiber and cement, and mix and stir at 30°C. The fibers are loosened, and the slurry is separated from the liquid to the solid after the material is evenly mixed. The filter cake is put into the mold of the molding machine and pressed, the molding pressure is 15MPa, and the molding pressure is maintained for 50min. After molding, the mold is demoulded, and the wet billet is allowed to rest for 40 hours, and then dried at 100°C. The finished product density of the insulating block made at last is 0.58g / cm 3 , the compressive strength is 6.23MPa, and the thermal conductivity is 0.15w / (m·k). ...

Embodiment 2

[0030] The formula (mass ratio) of each component for preparing the thermal insulation block: 60wt% of silicon-calcium slag, 15wt% of fly ash, 15wt% of cotton fiber, and 20wt% of cement. After accurately weighing each material, put the silicon-calcium slag in the mixer, add water and stir according to the liquid-solid ratio of 30mL / g, gradually add the weighed fly ash, cotton fiber and cement, mix and stir at 50°C, and wait for The fibers are loosened, and the slurry is separated from the liquid to the solid after the material is evenly mixed. The filter cake is put into the mold of the molding machine to be pressed, the molding pressure is 10MPa, and the molding pressure is maintained for 5min. After molding, demoulding, the wet billet rested for 20 hours, and then dried at 80°C. The finished product density of the insulating block made at last is 0.47g / cm 3 , the compressive strength is 5.03MPa, and the thermal conductivity is 0.11w / (m·k).

Embodiment 3

[0032] The formula (mass ratio) of each component for preparing the thermal insulation block: 70wt% of silicon-calcium slag, 10wt% of fly ash, 5wt% of cotton fiber, and 15wt% of cement. After accurately weighing each material, put the silicon-calcium slag in the mixer, add water and stir according to the liquid-solid ratio of 40mL / g, gradually add the weighed fly ash, cotton fiber and cement, mix and stir at 90°C, and wait for The fibers are loosened, and the slurry is separated from the liquid to the solid after the material is evenly mixed. The filter cake is put into the mold of the molding machine to be pressed, the molding pressure is 20MPa, and the molding pressure is maintained for 70min. After molding, the mold is demoulded, and the wet billet is allowed to rest for 10 hours, and then dried at 120°C. The final density of the finished insulation block is 0.36g / cm 3 , the compressive strength is 3.68MPa, and the thermal conductivity is 0.09w / (m·k).

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Abstract

The invention discloses a lightweight thermal-insulation building block with silicon-calcium slag as a main raw material and a preparation method thereof. The preparation method comprises the following steps: weighing and preparing 50-80 wt% of silicon-calcium slag, 5-20 wt% of fly ash, 5-15 wt% of cotton fiber and 10-20 wt% of cement; putting silicon-calcium slag into a mixer, adding water, mixing, stirring, putting weighed fly ash, cotton fiber and cement in order, controlling temperature of the mixed material, carrying out liquid-solid separation on slurry after fiber is fully released and the materials are uniformly mixed, putting obtained filter cake into a die of a forming machine and carrying out compression moulding, demoulding the molded product, resting quietly and drying to obtain the lightweight thermal-insulation building block product. The prepared thermal-insulation building block has excellent properties of light weight, thermal insulation and strong mechanical property. A large doping amount of fly ash aluminium-extraction tailings is utilized, and the problem of secondary pollution from the fly ash wet-extraction technology of alumina is minimized. Steam pressing technology is not required, and energy consumption is low. The preparation method is simple and environmentally friendly, and is economic and easy to operate.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a lightweight building thermal insulation block and a preparation method thereof. Background technique [0002] With the advancement of my country's construction of a resource-saving society and the successive introduction of national energy-saving and consumption-reducing policies, energy-saving building materials will inevitably become the development direction of new building materials in the future and the development trend of the building materials industry. Clay brick is a traditional building material in our country. In order to protect the environment and land resources, the country has issued a series of policies to prohibit or restrict the production of high-energy-consuming solid clay bricks, and develop new energy-saving and environmentally-friendly building materials with low energy consumption and good thermal insulation performance. It is the only way ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/30
CPCY02W30/91
Inventor 马淑花刘中凯王月娇王晓辉郑诗礼
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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