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Granite-stone-flour-based autoclaved aerated concrete block and manufacture method thereof

A technology of concrete block and granite powder, applied in B08 grade autoclaved aerated concrete block and its preparation, granite powder-based B07 field, can solve the problems of large stockpile, low utilization rate, environmental pollution, etc., and achieve the production process Simple, low cost, and effective in solving resource shortages

Inactive Publication Date: 2017-03-29
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of stone processing such as architectural decorative stone and various artificial aggregate production (quarries), a large amount of discarded gravel, stone chips and stone powder are produced. The stockpiles are huge and the utilization rate is low, which has caused serious damage to the environment. Pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A granite stone powder-based autoclaved aerated concrete block, which is composed of the following components in weight percentage: 60% of granite stone powder, 11% of quicklime, 5% of gypsum, 20% of cement, 0.15% of aerated aluminum powder, and air-entraining agent 0.2%, the ratio of water to material is 0.45.

[0021] The preparation method of the above-mentioned granite stone powder aerated block comprises the following steps:

[0022] (1) After the granite block is crushed by a crusher, it is ground to a powder with a particle size below 200 mesh with a ball mill, and the quicklime is crushed by a crusher and then ground to a particle size below 200 mesh with a ball mill;

[0023] (2) Weigh aluminum powder paste, air-entraining agent and water in proportion, add part of the water respectively and stir evenly, and set aside; weigh granite stone powder, cement, quicklime and gypsum according to the proportion, pour them into the stirring pot, add the After the aeroso...

Embodiment 2

[0031] A granite stone powder-based autoclaved aerated concrete block, which is composed of the following components in weight percentage: 62% of granite stone powder, 11% of quicklime, 5% of gypsum, 18% of cement, 0.1% of aerated aluminum powder, and air-entraining agent 0.2%, the ratio of water to material is 0.50.

[0032] in:

[0033] SiO in the said granite powder 2 The content is 72%, of which SiO exists in the quartz state 2 Content is 40%, Al 2 o 3 The content is 14%.

[0034] The effective CaO content in the quicklime is 90%.

[0035] The solid content of the aerated aluminum powder paste is 70%, the active aluminum content in the solid content is 90%, the fineness is 0.075mm sieved 3.0%, the gas generation rate is 50% in 4 minutes, 90% in 16 minutes, and 99% in 30 minutes .

[0036] The preparation method of the above-mentioned granite stone powder autoclaved aerated concrete block is the same as in Example 1.

[0037] With reference to GB / T11969-2008 "Autocl...

Embodiment 3

[0039] A granite stone powder-based autoclaved aerated concrete block, which is composed of the following components in weight percentage: 62% of granite stone powder, 11% of quicklime, 5% of gypsum, 18% of cement, 0.10% of aerated aluminum powder, and air-entraining agent 0.2%, the ratio of water to material is 0.42.

[0040] in:

[0041] SiO in the said granite powder 2 The content is 72%, of which SiO exists in the quartz state 2 Content is 40%, Al 2 o 3 The content is 14%.

[0042] The effective CaO content in the quicklime is 90%.

[0043] The solid content of the aerated aluminum powder paste is 70%, the active aluminum content in the solid content is 90%, the fineness is 0.075mm sieved 3.0%, the gas generation rate is 50% in 4 minutes, 90% in 16 minutes, and 99% in 30 minutes .

[0044]The preparation method of the above-mentioned granite stone powder autoclaved aerated concrete block is the same as in Example 1.

[0045] With reference to GB / T11969-2008 "Autocl...

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Abstract

The invention discloses a granite-stone-flour-based autoclaved aerated concrete block and a manufacture method thereof. The autoclaved aerated concrete block comprises, by mass percentage, 60-65% of granite stone flour, 18-21% of cement, 8-11% of quicklime, 3-6% of desulfurized gypsum, 0.1-0.15% of aerated aluminium powder paste, and 0.1-0.3% of an air-entrainer, with the water-to-material ratio being 0.4-0.5%. The manufacture method comprises: taking finely-ground granite stone flour as a main raw material, adding cement, gypsum, quicklime, aluminium powder paste and the air-entrainer, performing stirring with water, carrying out casting moulding, gas generation and expansion, precuring and cutting, and performing high-pressure steam curing to obtain the block. Waste granite stone flour produced in a processing process of stone is used, so that resource utilization of waste is realized, and the problems of coal ash resource shortage and environmental pollution are overcome. The block belongs to a novel wall material, and the production technology is simple, and is low in cost and suitable for popularization.

Description

technical field [0001] The invention relates to the field of novel wall materials, in particular to a granite powder-based B07 and B08 grade autoclaved aerated concrete block and a preparation method thereof. Background technique [0002] Autoclaved aerated concrete is made by adding aluminum powder (paste) as an air-generating agent to the ingredients of siliceous and calcareous raw materials, stirring with water, pouring, air-expanding, pre-curing and cutting, and then cured by high-pressure steam porous silicate materials. Its volume density is 300~800kg / m 3 , which is 1 / 3 of the red brick; the thermal conductivity is 0.09~0.22W / (m K), which is only 1 / 4~1 / 5 of the red brick. Therefore, it is widely used in industrial and civil buildings, and has become a new type of building material that is energy-saving and environmentally friendly. In particular, autoclaved aerated concrete can use a large amount of solid waste as siliceous raw materials, which conforms to the devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/00C04B111/40
CPCC04B28/00C04B2111/40C04B2201/20C04B14/048C04B22/064C04B22/145C04B22/04C04B20/0076C04B2103/304C04B38/02
Inventor 候双双陶文宏付兴华刘裕
Owner UNIV OF JINAN
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