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A nickel slag autoclaved aerated concrete block and its preparation method

A concrete block and autoclaved air-entrainment 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 thickening slurry and uniform and stable pores

Active Publication Date: 2017-01-25
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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  • A nickel slag autoclaved aerated concrete block and its preparation method
  • A nickel slag autoclaved aerated concrete block and its preparation method
  • A nickel slag autoclaved aerated concrete block and its preparation method

Examples

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preparation example Construction

[0067] As a preferred embodiment, the present invention provides a method for preparing the nickel slag autoclaved aerated concrete block, the specific steps are:

[0068] I. Preparation of slurry

[0069] a. Get nickel slag, fly ash and gypsum by weight ratio, mix, and dry grind to less than 5% through the square hole sieve with aperture 0.2mm;

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

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

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

[0073] E. mixing the quicklime powder obtained by cement, the mortar obtained in step c, and the step d, stirring, and adding the thickening stabilizer ...

Embodiment 1

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

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

[0089] Prepared by the following method:

[0090] I. Preparation of slurry:

[0091] a. Get nickel slag, fly ash and gypsum, mix, and dry grind to less than 5% through the square hole sieve of aperture 0.2mm;

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

[0093] c. Take K 2 SO 4 Add in the mortar that step b obtains;

[0094] d. Get quicklime, crush it, and dry grind it to less than 5% through a square-hole sieve with an aperture of 0.2 mm to obtain quicklime powder;

[0095] E. mix the quicklime powder that cement, the mortar that step c obtains and step d obtain, stir, drop oleic acid and triethanolamine sequentially respectively;

[00...

Embodiment 2

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

[0107] Raw material formula: as shown in Table 2. Among them, the calculated active calcium content of raw materials is 3.45kg, K + The molar ratio of active calcium to raw material 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% 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 standby;

[0112] c. Take K 2 SO 4 Add in the mortar that step b obtains;

[0113] d. Get quicklime, crush it, and dry grind it to less than 5% through a square-hole sieve with an aperture of 0.2 mm to obtain quicklime powder;

[0114] E. mix the quicklime powder that cement, the mortar that step c obtains and step d obtain, stir, drop oleic acid and triethanolamine sequentially resp...

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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 metallurgical waste residue and a preparation method thereof. Background technique [0002] Walls are an important part of buildings. Its function is to bear weight or enclose and separate space. It requires sufficient bearing capacity and stability, and should have thermal insulation, heat insulation, and 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 country implements the wall reform policy, requiring new wall materials to replace clay solid bricks. Autoclaved aerated concrete block is a new type of wall material developed in recent years. It is a porous silicate block made by adding aluminum powder to the ingredients of calcium and silicon materials a...

Claims

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Application Information

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Patent Type & Authority Patents(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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