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Autoclaved aerated concrete block and manufacturing process thereof

A concrete block and manufacturing process technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as economic loss, environmental pollution, and slow down of body hardening, and achieve the goal of protecting the ecological environment Effect

Inactive Publication Date: 2014-08-06
FUZHOU HENGSHUN ENVIRONMENTAL PROTECTION BUILDINGMATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the cut waste is not recycled, it will not only bring environmental pollution, but also bring a lot of economic losses.
In the prior art, it has also been considered to add waste and waste slurry to the production of blocks for use, but after adding waste and waste slurry, the hardening of the green body slows down, and the strength of the product is not enough

Method used

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  • Autoclaved aerated concrete block and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1. Fly ash: SiO2 ≥ 40%, SO3 ≤ 2%, loss on ignition < 12%, fineness of 0.08mm square hole sieve residue < 8%, if it does not meet the requirements, it should be ground, and the radioactivity should meet the requirements GB6763 regulation.

[0065] Sand: SiO 2 ≥65%, K 2 O+N a2 ≤5%, moisture content ≤8%, mud content ≤8%, no bark, grass roots and other inclusions, radioactivity should comply with GB6763 regulations, fineness after ball milling is 0.08mm square hole sieve residue <8%.

[0066] 2. Cement: 32.5R ordinary Portland cement that should meet the GB175-1999 standard.

[0067] 3. Quicklime: Effective CaO≥75%, MgO≤5%, SiO2≤5%, CO2≤5%, digestion speed≤15min, digestion temperature≥60℃, 0.08mm square hole sieve balance<15% .

[0068] 4. Phosphogypsum: CaSO4·2H2O>70%.

[0069] 5. Aluminum powder paste (water type): solid content ≥ 65% (GLS-65 type) or ≥ 70% (GLS-70 type), active aluminum content in solid content ≥ 85%, no aggregates, fineness 0.075mm Sieve residue...

Embodiment 2

[0102] The basic mixing ratio of raw materials is (parts by weight): sand:lime:cement:gypsum:waste=70:15:5:4:6.

[0103] Aluminum powder accounts for 0.075% of the total dry material, and the ratio of water to material is 0.65. The selection and preparation method of raw materials are the same as in Example 1.

Embodiment 3

[0105] Fly ash: lime: cement: gypsum: waste = 65:18:8:3:6. Aluminum powder accounts for 0.075% of the total dry material, water-material ratio: 0.6. The selection and preparation method of raw materials are the same as in Example 1.

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Abstract

The invention provides an autoclaved aerated concrete block and a manufacturing process thereof. The autoclaved aerated concrete block comprises the following raw materials by weight parts: 60-70 parts of coal ash (sand), 15-20 parts of lime, 5-10 parts of cement, 2-4 parts of gypsum and 5-8 parts of wastes, wherein aluminum powder accounts for 0.075% of the total weight of dry materials, and the water-material ratio is 0.6-0.65. The manufacturing process comprises the following steps: storing and processing the raw materials; dosing, stirring, and pouring; standing, cutting, and grouping; autoclaving to obtain a finished product of the autoclaved aerated concrete block. According to the process, industrial solid wastes-phosphogypsum are used as the raw materials, wastewater and leftover materials discharged in a production process are recycled, the produced aerated concrete block completely meets the national standards, the influence on the aerated concrete block caused by phosphate impurities in the phosphogypsum is avoided, the problems of reasonable utilization of the leftover materials and waste slurry are solved, the industrial solid wastes are treated and turn into wealth, the ecological environment is protected, and the novel process is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an autoclaved aerated concrete block and its manufacturing process. Background technique [0002] Air-entrained concrete is a lightweight and porous new building material with the advantages of light weight, good heat preservation, machinability and non-combustibility. It can be made into blocks, plates and insulation products of different specifications, and is widely used in load-bearing or enclosure filling structures of industrial and civil buildings. Material. [0003] Air-entrained concrete technology first appeared in the Czech Republic. Until 1923, the Swedish J.A.Eriksson mastered the production technology of using aluminum powder as the gas generating agent and obtained the patent right. From the beginning of the industrial production of air-entrained concrete to less than 80 years of history, the air-entrained concrete industry has been greatly developed,...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/08C04B22/14C04B22/04
CPCY02W30/91
Inventor 辛林
Owner FUZHOU HENGSHUN ENVIRONMENTAL PROTECTION BUILDINGMATERIALS CO LTD
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