Foamed masonry made of fly ash and preparation method thereof

A fly ash and masonry technology, applied in the field of foam masonry, can solve the problems of light weight and no advantage in heat preservation, and achieve the effects of avoiding fire hazards, low overall cost, and simple synthesis process

Inactive Publication Date: 2016-06-22
辽宁精化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement slag hollow brick has no advantages in terms of light weight and heat preservation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of foam stabilizer: Heat 800mL of water to 70°C, add 100g of polyvinyl alcohol, T=90-95°C and stir to dissolve; cool down to 80°C, add 7g of hydrochloric acid with a mass fraction of 31%, and stir for 20 minutes. Add 40g of formaldehyde with a mass fraction of 35%, and react for 1 hour at T=80°C. Cool down to 60°C, add 15% sodium hydroxide solution (solution concentration: 16%) to adjust pH=7.

[0033] Quality index: Appearance is colorless transparent viscous liquid, solid content: >9%, free formaldehyde: <2.5%, pH: 7, intrinsic viscosity: 70.5.

[0034] Synthesis of foamed masonry: weigh fly ash: 55g, magnesium oxide: 45g, foam stabilizer: 15g, magnesium chloride solution: 70mL (the preparation method of magnesium chloride aqueous solution is to mix magnesium chloride hexahydrate and water in a mass ratio of 1:1 to prepare 23 ~24% aqueous solution, the density is about 1.21.) Put it into a mortar, grind until there are no particles, add foaming agent hydrog...

Embodiment 2

[0037] Synthesis of foam stabilizer: Add 800mL of water to a four-neck bottle, stir to raise the temperature to 70°C, add 100g of polyvinyl alcohol, T=90-95°C and stir to dissolve; cool down to 80°C, add 7g of hydrochloric acid, and stir for 20 minutes. Add 40g of formaldehyde, T=80°C, and react for 1 hour. Cool down to below 60°C, add sodium hydroxide solution (solution concentration: 18%) to adjust pH=7~8.

[0038] Quality index: Appearance is colorless transparent viscous liquid, solid content: >9%, free formaldehyde: <2.5%, pH: 7-8, intrinsic viscosity: 70.5.

[0039] Synthesis of foamed masonry: Weigh fly ash: 110g, magnesium oxide: 90g, foam stabilizer: 30g, magnesium chloride solution: 120mL, add to the mortar, grind until there are no particles, add foaming agent: 11mL, stir evenly, Pour into molds.

[0040] Conservation: After curing and molding, let it dry naturally, and reach the maximum strength after 28 days of age.

[0041] The bubbles of the foamed masonry pr...

Embodiment 3

[0044] Synthesis of foam stabilizer: Add 800mL of water to a four-neck bottle, stir to raise the temperature to 70°C, add 100g of polyvinyl alcohol, T=90-95°C and stir to dissolve; cool down to 80°C, add 7g of hydrochloric acid, and stir for 20 minutes. Add 40g of formaldehyde, T=80°C, and react for 1 hour. Cool down to below 60°C, add sodium hydroxide solution to adjust pH=7~8.

[0045] Quality index: Appearance is colorless transparent viscous liquid, solid content: >9%, free formaldehyde: <2.5%, pH: 7-8, intrinsic viscosity: 70.5.

[0046] Synthesis of foamed masonry: Weigh fly ash: 165g, magnesium oxide: 135g, foam stabilizer: 45g, magnesium chloride solution: 150mL, add to the mortar, grind until there are no particles, add foaming agent: 10mL, stir evenly, Pour into molds.

[0047] Conservation: After curing and molding, let it dry naturally, and reach the maximum strength after 28 days of age.

[0048] The bubbles of the foamed masonry produced by the method of the p...

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Abstract

The invention relates to a novel foaming masonry process, in particular to a foaming masonry formed by self-foaming by using power plant fly ash as a raw material, adding chemical components such as halogen-containing compounds and alkali metal oxides. The raw materials are calculated according to the mass ratio: fly ash: magnesium oxide: magnesium chloride: foam stabilizer: water = 10 ~ 15: 7 ~ 12: 2 ~ 6: 1 ~ 5: 42 ~ 80 mixed, according to the total mass of raw materials after mixing Add 5-10% foaming agent by meter, and maintain in an oven at a constant temperature of 20-25°C. The present invention is a new type of building material that combines environmental protection, heat preservation, light weight, flame retardancy, sound insulation and a series of advantages made by using industrial waste ─ fly ash and magnesium oxychloride cement.

Description

technical field [0001] The invention relates to a novel foaming masonry process, specifically a foaming masonry body formed by self-foaming by using power plant fly ash as raw material, adding chemical components including halogen-containing compounds and alkali metal oxides. Background technique [0002] As we all know, clay bricks, one of the traditional building materials, are banned due to high energy consumption and waste of land, and are replaced by some emerging new building materials such as: foam concrete, aerated concrete, cement slag hollow bricks, etc., among which aerated concrete and Foamed concrete uses Portland cement as colloidal material in the production process or high-temperature steam pressure curing, or mechanical foaming to form pores. The equipment investment is large, the energy consumption is high, and the amount of fly ash is relatively small. The cement slag hollow brick has no advantages in terms of light weight and heat preservation. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/32
Inventor 于永波王维义王瑾
Owner 辽宁精化科技有限公司
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