Composite foamed cement heat retaining panel using high-volume fly ash and preparation method thereof

A technology for compounding foamed cement and fly ash, applied in the field of building materials, can solve the problems of strength shrinkage, obvious shrinkage deformation, cracking, etc., and achieve the effects of overcoming large drying shrinkage value, reducing environmental pollution, and simple configuration process

Inactive Publication Date: 2012-12-12
JIANGSU NIGAO SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the excessive use of ordinary Portland cement or Portland cement as the cementitious material, when pouring large mold specimens, the hydration speed is relatively fast, the heat release is large, the internal temperature is high, the shrinkage deformation is obvious, and cracking is easy to occur , strength shrinkage and other issues

Method used

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  • Composite foamed cement heat retaining panel using high-volume fly ash and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A composite foamed cement insulation board using a large amount of fly ash. The ratio of each raw material is: 75 parts of ordinary Portland cement, 25 parts of fly ash, 0.8 parts of calcium stearate water repellent, polycarboxylate 0.20 parts of acid-based high-efficiency water reducer, 1.2 parts of activator, 0.36 part of polypropylene fiber, 50 parts of water, 5 parts of hydrogen peroxide foaming agent, wherein the activator consists of triethanolamine, sodium sulfate and sodium carbonate in a weight ratio of 1: 10:5 mixed.

[0033] The preparation of the composite foamed cement insulation board is carried out according to the following method: Weigh each raw material according to the proportion, first put water, anti-crack fiber, water reducer, water repellent, cement and fly ash into the mixer, and stir After 3 minutes, add the activator and stir for 1 minute, then add the foaming agent and stir for 7 seconds to make a mixed slurry. Pour the prepared mixed slurry ...

Embodiment 2

[0035] A composite foamed cement insulation board using a large amount of fly ash. The ratio of each raw material is: 70 parts of ordinary Portland cement, 30 parts of fly ash, 1.0 parts of calcium stearate water repellent, polycarboxylate 0.20 parts of acid-based high-efficiency water reducer, 1.0 part of activator, 0.40 part of polypropylene fiber, 44 parts of water, 5.2 parts of hydrogen peroxide foaming agent, wherein the activator consists of triethanolamine, sodium sulfate and sodium carbonate in a weight ratio of 1: 12:5 mixed.

[0036] The preparation of the composite foamed cement insulation board is carried out according to the following method: Weigh each raw material according to the proportion, first put water, anti-crack fiber, water reducer, water repellent, cement and fly ash into the mixer, and stir After 2 minutes, add the activator and stir for 2 minutes, then add the foaming agent and stir for 5 seconds to make a mixed slurry. Pour the prepared mixed slurr...

Embodiment 3

[0038] A composite foamed cement insulation board using a large amount of fly ash, the ratio of each raw material is: 65 parts of Portland cement, 35 parts of fly ash, 1.2 parts of calcium stearate water repellent, polycarboxylic acid It is 0.16 parts of high-efficiency water reducer, 1.4 parts of activator, 0.40 parts of polypropylene fiber, 40 parts of water, 5.4 parts of hydrogen peroxide foaming agent, wherein the activator is composed of triethanolamine, sodium sulfate and sodium carbonate in a weight ratio of 1:12 :6 mixed.

[0039] The preparation of the composite foamed cement insulation board is carried out according to the following method: Weigh each raw material according to the proportion, first put water, anti-crack fiber, water reducer, water repellent, cement and fly ash into the mixer, and stir After 3 minutes, add the activator and stir for 2 minutes, then add the foaming agent and stir for 10 seconds to make a mixed slurry. Pour the prepared mixed slurry in...

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Abstract

The invention discloses a composite foamed cement heat retaining panel using high-volume fly ash and a preparation method thereof; the composite foamed cement heat retaining panel is prepared by 60-80 parts of cement, 20-40 parts of fly ash, 0.6-3.0 parts of moisture repellent, 0.12-0.30 part of a water reducing agent, 0.8-3.0 parts of an exciting agent, 0.3-0.50 part of anti-crack fiber, 30-60 parts of water and 4-8 parts of a foaming agent (by weight); the preparation method comprises the following steps: weighing each raw material; adding the water, the anti-crack fiber, the moisture repellent, the cement, the fly ash, the water reducing agent; stirring a mixture; adding the exciting agent; stirring the mixture; adding the foaming agent; stirring the mixture so as to prepare mixed slurry; then, injecting the mixed slurry into a mould; putting the mould statically for 4-5 hours; removing the mould; after 24 hours, cutting and packaging a product; and maintaining the product until age is 28 days. According to the invention, a part of the cement is substituted by fly ash; cost is low; environment pollution is reduced; and social efficiency and economic benefit are obvious.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a composite foamed cement insulation board using a large amount of fly ash and a preparation method thereof. Background technique [0002] Fly ash is a waste material discharged from coal-fired power plants or thermal power plants. my country is a big energy-consuming country, and its energy structure is dominated by coal. In recent years, my country's energy industry has developed rapidly, and the discharge of fly ash has increased sharply, making it the largest ash discharge country in the world. In 2009, the discharge of fly ash exceeded 375 million tons, which brought huge pressure on my country's national economic construction and ecological environment. On the other hand, my country is a country with a low per capita share of resources. Therefore, how to turn fly ash into treasure and harm into profit has become an important technical and economic policy in my country's ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04
Inventor 徐建军吴海军雷文晗季亚军罗峰许霞
Owner JIANGSU NIGAO SCI & TECH
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