Nickel slag autoclaved aerated concrete block and preparation method thereof

A concrete block and autoclaved aerated technology, which is applied in the field of building materials, can solve the problems of cracking and damage of concrete blocks, high strength of autoclaved aerated concrete blocks, etc., and achieve the effect of uniform and stable pores and thickened slurry

Active Publication Date: 2015-06-03
宁夏绿筑节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention well solves the problem of cracking and damage of the concrete block caused by the expansion of the nickel slag during the hydration process, and the prepared autoclaved aerated concrete block has high strength, and all indexes conform to the national standard "GB / T11968-2006 》, opened up a new way for the reuse of nickel slag

Method used

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  • Nickel slag autoclaved aerated concrete block and preparation method thereof
  • Nickel slag autoclaved aerated concrete block and preparation method thereof
  • Nickel slag autoclaved aerated concrete block and preparation method thereof

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preparation example Construction

[0067] As a preferred embodiment, the present invention provides a preparation method of the above-mentioned nickel slag autoclaved aerated concrete block, the specific steps are:

[0068] I. Preparation of Slurry

[0069] a. Take nickel slag, fly ash and gypsum in proportion by weight, mix them, and dry-grind them until the residue is less than 5% through a square-hole sieve with an aperture of 0.2 mm;

[0070] b. adding water in proportion to the mixture obtained in step a to prepare a mortar with a specific gravity of 1.5 to 1.8Kg / L for subsequent use;

[0071] c. according to the active calcium content of the base material, add an ion crystallizer to the mortar obtained in step b according to the molar ratio;

[0072] d. Take quicklime according to the weight ratio, crush and dry pulverize until the sieve residue is less than 5% through a square-hole sieve with an aperture of 0.2 mm to obtain quicklime powder;

[0073] e. the cement, the mortar obtained in step c and the...

Embodiment 1

[0087] Example 1 A nickel-based steam pressurized concrete block

[0088] Raw material formula: shown in table 2; Wherein. The active calcium content of raw material is calculated to be 3.44kg, K + The molar ratio with the raw material active calcium is 0.02:1.

[0089] Prepared by the following method:

[0090] I. Preparation of slurry:

[0091] a. Take nickel slag, fly ash and gypsum, mix them, and dry-grind them to less than 5% after passing through a square-hole sieve with an aperture of 0.2 mm;

[0092] B. add whole water in the mixture that step a obtains, make the mortar of specific gravity 1.72Kg / L for subsequent use;

[0093] c. Take K 2 SO 4 adding to the mortar obtained in step b;

[0094] d. Take quicklime, crush and dry-pulverize it until the sieve remainder is less than 5% through a square-hole sieve with an aperture of 0.2 mm to obtain quicklime powder;

[0095] e. the cement, the mortar obtained in step c and the quicklime powder obtained in step d are...

Embodiment 2

[0106] Example 2 A nickel-based steam pressurized concrete block

[0107] Raw material formula: see Table 2. Among them, the active calcium content of the calculated raw material is 3.45kg, K + The molar ratio with the raw material active calcium is 0.02:1.

[0108] Prepared by the following method:

[0109] I. Preparation of slurry:

[0110] a. Take nickel slag, fly ash and gypsum, mix them, and dry-grind them to less than 5% after passing through a square-hole sieve with an aperture of 0.2 mm;

[0111] B. add whole water in the mixture that step a obtains, make the mortar of specific gravity 1.64g / L for subsequent use;

[0112] c. Take K 2 SO 4 adding to the mortar obtained in step b;

[0113] d. Take quicklime, crush and dry-pulverize it until the sieve remainder is less than 5% through a square-hole sieve with an aperture of 0.2 mm to obtain quicklime powder;

[0114] e. the cement, the mortar obtained in step c and the quicklime powder obtained in step d are mixed...

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Abstract

The invention provides a nickel slag autoclaved aerated concrete block. The raw materials comprise basic materials, admixtures and water, wherein the basic materials comprise nickel slag, coal ash, cement, quick lime, aluminum powder and gypsum; and the admixtures comprise thickened stabilizers and ion crystal modifiers. The invention also provides a method for preparing the nickel slag autoclaved aerated concrete block. The quality of the nickel slag autoclaved aerated concrete block disclosed by the invention meets the requirement on national standard GB11968-2006, and a way is found for large-scale utilization of nickel slag.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to an autoclaved aerated concrete block prepared by using nickel metallurgy waste residue and a preparation method thereof. Background technique [0002] Walls are an important part of a building. Its function is to bear or protect and separate the space. It requires sufficient bearing capacity and stability, and should have thermal insulation, thermal insulation, sound insulation properties, and meet the requirements of fire protection, moisture resistance and waterproofing. With the development of society, in order to protect the land and save energy, the state implements the wall reform policy, requiring the replacement of clay solid bricks with new wall materials. Autoclaved aerated concrete block is a new type of wall material developed in recent years. It is a porous silicate block formed by adding aluminum powder as air-entraining agent to the ingredients of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/14
Inventor 吴其胜光鉴淼诸华军张长森
Owner 宁夏绿筑节能科技有限公司
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