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Straw cement based compound porous self-heat-insulating material and preparation method thereof

A cement-based, self-insulation technology, which is applied in the field of building self-insulation materials, can solve the problems of environmental pollution and energy consumption, and achieve the effects of small equipment investment, improved thermal insulation performance, energy saving and environmental protection benefits

Inactive Publication Date: 2011-01-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most buildings in China are of high energy consumption, and the heating energy consumption per unit area is equivalent to 2-3 times that of countries with similar climate conditions in the world. surroundings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Farm straw 1.0%

[0029] Cement 68.48%

[0030] Industrial waste 4.75%

[0031] Foaming agent 0.30%

[0032] Water repellent 0.34%

[0033] Coagulant 0.68%

[0034] Water reducer 0.13%

[0035] Water 24.32%

[0036] Its performance is measured as follows:

[0037] Dry density is 240kg / m 3 , the compressive strength is 1.0MPa, the thermal conductivity is 0.06W / (m.K), the settlement rate is 1.5%, the expansion degree is 264mm, and the water absorption rate is 0.5%.

Embodiment 2

[0039] Farm straw 1.94%

[0040] Cement 64.77%

[0041] Industrial waste 5.00%

[0042] Foaming agent 0.30%

[0043] Water repellent 0.67%

[0044] Coagulant 1.29%

[0045] Water reducer 0.1%

[0046] Water 25.93%

[0047] Its performance is measured as follows:

[0048] The dry density is 272kg / m 3 , the compressive strength is 0.9MPa, the thermal conductivity is 0.071W / (m.K), the settlement rate is 1%, the expansion degree is 245mm, and the water absorption rate is 0.5%.

Embodiment 3

[0050] Farm straw 1.02%

[0051] Cement 67.33%

[0052] Industrial waste 6.00%

[0053] Foaming agent 0.23%

[0054] Water repellent 0.68%

[0055] Coagulant 1.02%

[0056] Water reducer 0.07%

[0057]Water 23.65%

[0058] Its performance is measured as follows:

[0059] Dry density is 382kg / m 3 , the compressive strength is 1.2MPa, the thermal conductivity is 0.123W / (m.K), the settlement rate is 0.8%, the expansion degree is 250mm, and the water absorption rate is 0.3%.

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Abstract

The invention discloses a straw cement based compound porous self-heat-insulating material which is a new-type light, high-strength and porous building self-heat-insulating material prepared by foaming farmland straw, cement, industrial residue, foaming agent, waterproofing agent, coagulant, water reducer and water, and then mixing with gelled material slurry. The self-heat-insulating material comprises the following components by mass percent: 0.12-14.83% of farmland straw, 28.70-72.08% of cement, 0.40-43.52% of industrial residue, 0.04-0.40% of foaming agent, 0.06-0.89% of waterproof agent, 0.11-1.45% of coagulant, 0.06-0.13% of water reducer and 23.65-33.97% of water. The main raw materials, such as farmland straw, and industrial residue and other wastes used by the self-heat-insulating material prepared by the invention have wide resources, low cost and convenient preparation process, do not need high-temperature maintenance, simultaneously have excellent heat insulating performance, high mechanical strength, and have the outstanding properties of energy conservation, environmental protection, waste utilization, regeneration and the like.

Description

technical field [0001] The invention relates to a novel light-weight, high-strength, porous building self-insulation material prepared by using farmland straw and industrial waste residues. Specifically, a new type of porous material prepared by foaming technology using farmland straw waste and industrial waste such as fly ash, slag powder, slag, ground coal gangue powder, mine tailings, silica fume, etc. Self-insulating material. It is mainly used in the field of building energy saving. Background technique [0002] my country is a large agricultural country with abundant crop straw resources, with an annual output of about 700 million tons of straw, ranking first in the world. In recent years, with the rapid development of my country's economy, the rural energy structure has undergone significant changes. The traditional demand for straw as living fuel has decreased year by year, resulting in the accumulation of most of the remaining straw, and people often burn one of t...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C04B18/24
CPCY02W30/91
Inventor 张云升佘伟陈薇倪紫威秦鸿根石邢
Owner SOUTHEAST UNIV
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