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Ultra-light cement-based composite foaming material and preparation method thereof

A composite foaming and cement-based technology, which is applied in the field of building insulation materials, can solve problems such as fire accidents, poisonous gas emission, and poor insulation effects in insulation projects, and solve the problem of slurry volume stability, reduce surfactant content, The effect of promoting overall performance

Inactive Publication Date: 2013-02-20
建筑材料工业技术监督研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the requirements of relevant standards, the thermal conductivity of EPS is ≤0.042W / (m K), and the thermal conductivity of XPS is usually 0.030~0.040W / (m K). The thermal insulation effect is good, but there are the following main problems: i) Poor fire safety, Fire accidents occur frequently in thermal insulation projects, causing heavy casualties and economic losses; ii) poor weather resistance and durability, and cannot last the same life as the building. During the service period of the building, the insulation layer needs to be replaced many times, wasting a lot of manpower, material and financial resources
Disadvantages are: expensive, poisonous gas emitted during spraying, wind blowing affects spraying, humidity affects bonding, large shrinkage (up to 2%), poor fire safety, large smoke when burning, high toxicity, poor aging resistance, and durability cannot be compared with On par with inorganic insulation materials
However, there are still many defects in the currently disclosed inorganic foam materials, such as heavy weight (air-entrained concrete and foam concrete usually have a dry density greater than 300kg / m3), high brittleness, easy cracking, high water absorption, and poor thermal insulation effect, which cannot meet the needs of the industry. The need for building thermal insulation limits its application scale

Method used

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  • Ultra-light cement-based composite foaming material and preparation method thereof
  • Ultra-light cement-based composite foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Take 700 parts of Portland cement, 300 parts of fly ash, 2 parts of water reducing agent, 3 parts of cell regulator, 8 parts of slurry thickening regulator, 5 parts of fiber, and 20 parts of foam stabilizer and mix them evenly with a mixer. Then add 400 parts of water and stir for 3 minutes to form a pure slurry.

[0074] At the same time, 420 parts of the physical foam agent dilution were taken and stirred for 5 minutes by a paddle mixer at a speed of 1000 rpm to obtain a water-film foam.

[0075] Add the obtained water-film foam to the above-mentioned clean slurry and stir for 1 minute to obtain a foam slurry, then add 40 parts of a chemical foaming agent and 5 parts of a foaming accelerator to the foam slurry and mix them, after stirring for 30 seconds, pour into the mold, the pouring height is one-fifth of the mold height. Before pouring, the mold should complete the process of brushing the release agent to ensure that the edges, corners, corrugations, partitions, ...

Embodiment 2

[0079] The preparation method and steps are the same as in Example 1. The amounts of different components added are 800 parts of sulphoaluminate cement, 200 parts of fly ash, 3 parts of water reducer, 2 parts of cell regulator, and the slurry is thick. 7 parts of chemical regulator, 4 parts of fiber, 30 parts of foam stabilizer, 350 parts of mixing water, 6 parts of foam accelerator, 50 parts of chemical foaming agent, 25 parts of physical foaming agent, and 500 parts of physical foaming agent dilution water.

Embodiment 3

[0081] The preparation method and steps are the same as in Example 1. The amounts of different components added are 900 parts of sulphoaluminate cement, 100 parts of fly ash, 3 parts of water reducer, 2 parts of cell regulator, and the slurry is thick. 6 parts of chemical regulator, 3 parts of fiber, 40 parts of foam stabilizer, 300 parts of mixing water, 7 parts of foam accelerator, 60 parts of chemical foaming agent, 30 parts of physical foaming agent, and 600 parts of physical foaming agent dilution water.

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Abstract

The invention relates to an ultra-light cement-based composite foaming material and a preparation method thereof. The preparation method comprises: uniformly stirring cement, fly ash, water reducer, foam pore regulator, pulp thickness regulator, fiber, foam stabilizing agent and mixing water to prepare pure pulp; diluting a physical foaming agent by 20 folds and making foam by a mechanical means;mixing the made foam into the stirred pure pulp, stirring uniformly again and obtaining foam pulp; adding a chemical foaming agent and a foaming accelerator into the obtained foam pulp, and pouring into a mold preheated to 40 DEG C; after the pouring is finished, curing the mold in a constant-temperature curing chamber at 40 DEG C, curing for 24 to 32 hours, demolding, and obtaining the ultra-light cement-based composite foaming material. In the invention, the foaming material is prepared by a method of combining physical foaming and chemical foaming; and the obtained product is low in density and very light, reaches a fireproof grade A, has a long service life and excellent comprehensive performance and is suitable to be widely used.

Description

technical field [0001] The invention relates to a building thermal insulation material, in particular to an ultra-light cement-based composite foaming material and a preparation method thereof. Background technique [0002] Using good thermal insulation technology and materials in construction and industry can often get twice the result with half the effort. Statistics show that for every ton of mineral wool insulation products used in construction, one ton of oil can be saved a year. For the insulation of industrial equipment and pipelines, the use of good insulation measures and materials can significantly reduce production energy consumption and costs, improve the environment, and at the same time have better economic benefits. [0003] The foam insulation materials currently used in building insulation are mainly organic foam materials and inorganic foam materials. Organic foam insulation materials mainly include polystyrene foam, polyurethane rigid foam, etc. Inorgan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 李应权扈士凯秦洪友段策朱立德王笑帆
Owner 建筑材料工业技术监督研究中心
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