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Modified aerated concrete

An air-entrained concrete and modified technology, applied in the field of building materials, can solve the problems of poor durability, low shrinkage resistance, low block strength, etc., and achieve improved compressive strength, improved microstructure, and reduced drying shrinkage value. Effect

Inactive Publication Date: 2018-04-20
盐城市建筑设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, the main raw materials of aerated concrete blocks include cement, lime, sand, fly ash, slag, gas generating agent, air bubble stabilizer and regulator, etc. Gas expansion, static stop, cutting, autoclave curing, finished product processing and packaging, etc., the aerated concrete prepared by using the above raw materials is widely used, but there are still some problems in some aspects of aerated concrete blocks, mainly in: ( 1) The strength of the block is low, and the durability is not good; (2) The shrinkage resistance is generally low, resulting in the wall not being stable enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A modified air-entrained concrete, in parts by weight, the modified air-entrained concrete comprising the following raw materials: 80 parts of air-entrained concrete base material, 1 part of seed crystal; The hydrothermally synthesized silicate material of tobermullite and calcium silicate hydrate colloid; the air-entrained concrete base material includes the following raw materials: cement, lime, fly ash, and also includes an air-generating agent, a foam stabilizer, and the like. The hydrothermally synthesized silicate material includes the following raw materials: cement and fly ash.

[0018] A preparation method of modified air-entrained concrete, comprising the following steps: at normal temperature, mix the air-entrained concrete base material and seed crystals, add water and stir evenly; Under MPa steam pressure, steam at constant temperature and pressure for 5 hours to obtain the finished product.

Embodiment 2

[0020] A modified aerated concrete, in parts by weight, the modified aerated concrete comprises the following raw materials: 105 parts of aerated concrete base material, 10 parts of seed crystals; The hydrothermally synthesized silicate material of tobermullite and calcium silicate hydrate colloid; the air-entrained concrete base material includes the following raw materials: cement, lime, sand, and also includes an air-generating agent, a foam stabilizer, and the like. The hydrothermally synthesized silicate material includes the following raw materials: cement, lime and fly ash.

[0021] A preparation method of modified air-entrained concrete, comprising the following steps: at normal temperature, mix the air-entrained concrete base material and seed crystals, add water and stir evenly; Under MPa steam pressure, steam at constant temperature and pressure for 12 hours to obtain the finished product.

Embodiment 3

[0023] A modified air-entrained concrete, in parts by weight, the modified air-entrained concrete includes the following raw materials: the modified air-entrained concrete includes the following raw materials: 97 parts of air-entrained concrete base material, 3 parts of crystal seeds; Said seed crystal adopts the hydrothermally synthesized silicate material whose particle diameter is less than 80 microns and contains tobermullite and calcium silicate hydrate colloid; said aerated concrete base material includes the following raw materials: cement, lime, sand, pulverized coal Ash, also includes gas generating agent, foam stabilizer, etc. The hydrothermally synthesized silicate material includes the following raw materials: lime and fly ash.

[0024] A preparation method of modified air-entrained concrete, comprising the following steps: at normal temperature, mix the air-entrained concrete base material and seed crystals, add water and stir evenly; Under MPa steam pressure, st...

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Abstract

The invention discloses modified aerated concrete, which comprises, by weight, 80-105 parts of an aerated concrete base material and 1-10 parts of a crystal seed. The crystal seed is made from a hydro-thermal synthetic silicate material containing tobermorite and hydrated calcium silicate colloid. The modified aerated concrete is made through production technology of conventional aerated concrete.Through addition of the crystal seed, the hydro-thermal synthetic reaction of concrete is promoted, and the colloid is converted to tobermorite colloid. The total amount of hydrated calcium silicateand the crystal-colloid ratio are improved, and the microstructure of aerated concrete is improved. The compressive strength of aerated concrete is improved by 20%, and the drying shrinkage value is reduced to 0.2-0.3 mm / m.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a modified aerated concrete. Background technique [0002] Air-entrained concrete, as a new type of building material with low energy consumption and environmental protection, belongs to the building materials promoted by the state. Air-entrained concrete blocks have the characteristics of light weight, high strength, heat preservation, heat insulation, sound absorption, fire prevention, etc., and are widely used in frame structures, external wall filling and internal wall partitions of cast-in-place concrete structures, and can also be used in anti-seismic ring beam structures The outer wall of a multi-storey building or the thermal insulation composite wall is also used for the thermal insulation and heat insulation of the roof of the building. [0003] Generally, the main raw materials of aerated concrete blocks include cement, lime, sand, fly ash, slag, gas generating agent...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C04B22/08
CPCC04B22/00C04B28/00C04B22/064C04B14/06C04B2103/42C04B2103/48C04B38/02C04B40/024
Inventor 嵇蔚水陈云德洪国春黄万明
Owner 盐城市建筑设计研究院有限公司
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