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Method for preparing bearing steam-pressing aero-concrete using chemical clay-slag

An air-entrained concrete and autoclaved air-entraining technology, which is applied in chemical instruments and methods, clay preparation devices, mixing operation control, etc. The effect of increasing fineness and improving uniformity

Inactive Publication Date: 2010-05-05
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of aerated concrete is low, and it can only be used for non-load-bearing enclosure structures and load-bearing wall materials below three-story buildings, which greatly limits its application range.

Method used

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  • Method for preparing bearing steam-pressing aero-concrete using chemical clay-slag
  • Method for preparing bearing steam-pressing aero-concrete using chemical clay-slag
  • Method for preparing bearing steam-pressing aero-concrete using chemical clay-slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Combining figure 1 , the present invention utilizes chemical white mud slag to prepare the method for load-bearing autoclaved aerated concrete, comprising the following steps:

[0026] 1. Material selection: The moisture content of a certain calcium carbide sludge is 40%, the solid calcium carbide sludge contains 90% calcium hydroxide, and calcium hydroxide contains 75.7% calcium oxide, so the content of calcium hydroxide in calcium carbide sludge is 54% , the content of calcium oxide is 40.88%, the content of calcium oxide in cement is 62%, the content of calcium oxide in lime is 85%, and the content of silicon dioxide in fly ash is 65%.

[0027] 2. Add calcium carbide sludge, fly ash and water into a ball mill in a mass ratio of 2:5:3.5-6.5 for wet grinding. The fineness is controlled to be ≤8% on a 180-mesh sieve, and the fly ash mixed slurry is prepared for use. The pure solid mass ratio of white mud slag (dry basis) to fly ash in the coal ash mixture sl...

Embodiment 2

[0042] Example 2: Combining figure 2 , the present invention utilizes chemical white mud slag to prepare the method for load-bearing autoclaved aerated concrete, comprising the following steps:

[0043] 1. Material selection: The moisture content of a certain propylene oxide tailings is 40%, the solids of the propylene oxide tailings contain 90% calcium hydroxide, and calcium hydroxide contains 75.7% calcium oxide, so the hydroxide in the propylene oxide tailings The content of calcium is 54%, the content of calcium oxide is 40.88%, the content of calcium oxide in cement is 62%, the content of calcium oxide in lime is 85%, the content of silica in powdered quartz sand is 95%, and the content of silica in fly ash 65%, the silica content in cement is 25%. In the process of producing quartz sand for glass, a large amount of ultra-fine tailing sand is produced, with a fineness of more than 100 meshes, all of which are discharged as waste materials. This part of fine sand is coll...

Embodiment 3

[0058] Example 3: Binding figure 2 , the present invention utilizes chemical white mud slag to prepare the method for load-bearing autoclaved aerated concrete, comprising the following steps:

[0059] 1. Material selection: A calcium carbide sludge has a moisture content of 40%, solid carbide sludge contains 90% calcium hydroxide, and calcium hydroxide contains 75.7% calcium oxide, so the content of calcium hydroxide in calcium carbide sludge is 54%. , the content of calcium oxide is 40.88%, the content of calcium oxide in cement is 62%, the content of calcium oxide in lime is 85%, the content of silica in yellow sand is 80%, the content of silica in fly ash is 65%, the content of silica in cement 25%.

[0060] 2. Add calcium carbide sludge, yellow sand (except yellow sand, river sand or mountain sand) and water into a ball mill in a mass ratio of 1.5:1:0.5-1.5 for wet grinding, and the fineness is controlled to be ≤8% on a 180-mesh sieve , make the mixed slurry for subsequ...

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Abstract

A process for preparing the load-bearing aerated concrete from the chemical white mud dregs (calcium carbide dregs and epoxy propane tailing dregs) includes such steps as mixing the white mud dregs with silicon material, wet grinding, adding additive and cement, stirring, steam heating, adding lime powder, stirring, steam heating, adding aluminum powder, stirring, steam heating, moulding, laying aside while aerating, and cutting.

Description

1. Technical field [0001] The invention relates to a preparation technology of a high-strength load-bearing autoclaved aerated concrete wall material, in particular to a method for preparing load-bearing autoclaved aerated concrete by using chemical white mud slag. 2. Background technology [0002] The national wall material innovation plan and the 2010 development plan clearly pointed out: "my country's cross-century wall materials should focus on the development of light-weight, high-strength and energy-saving new wall materials." The Ministry of Construction's Building Energy Conservation Plan and the 2010 Plan put forward higher energy-saving standards for building heating and air conditioning energy consumption: "The first stage is the general reduction of 30% in new heating residential buildings before 1996; 30% energy saving on the basis of the second stage is the second stage; on the basis of reaching the second stage from 2005, another 30% energy saving is the third...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28C5/46B28C7/04C04B18/30
CPCY02W30/91
Inventor 崔崇江金国
Owner NANJING UNIV OF SCI & TECH