Heat-insulation foamed cement board based on foam concrete wastes

A technology of foamed concrete and foamed cement, applied in the field of building insulation materials, to achieve the effects of enriching types, improving greenness, and being easy to promote

Active Publication Date: 2018-08-14
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above problems, the present invention provides a foamed cement insulation board based on foamed concrete waste in order to solve the problems existing in the recycling and treatment of the existing foamed concrete scraps, which can recycle the waste of foamed concrete boards and improve the efficiency of inorganic lightweight materials. greenness of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare the board-making raw materials according to the following parts by weight: 70 parts of ordinary Portland cement, 30 parts of fly ash, 0.5 parts of foaming agent, 6 parts of foamed concrete, 60 parts of water, and 1 part of water reducing agent;

[0023] The preparation method is as follows:

[0024] 1) According to the weight ratio, add 70 parts of ordinary Portland cement and 30 parts of fly ash to the planetary cement mortar mixer in sequence, and stir for 6-10 seconds;

[0025] 2) Break the discarded foamed concrete into lightweight aggregates with a particle size of 5 mm to 20 mm, soak in water for 1 hour, take it out and dry the surface moisture to obtain pre-wet foamed concrete;

[0026] 3) After diluting the foaming agent with water, add it to the planetary cement mortar mixer, and stir at high speed until a large number of milky white fine and uniform bubbles are produced;

[0027] 4) Add the mixture obtained in step 1 to step 3, and continue to stir fo...

Embodiment 2

[0032] Prepare the board-making raw materials according to the following parts by weight: 70 parts of ordinary Portland cement, 30 parts of fly ash, 0.5 parts of foaming agent, 12 parts of foamed concrete, 60 parts of water, and 1 part of water reducing agent.

[0033] The preparation method is as follows:

[0034] 1) According to the weight ratio, add 70 parts of ordinary Portland cement and 30 parts of fly ash to the planetary cement mortar mixer in sequence, and stir for 6-10 seconds;

[0035] 2) Break the discarded foamed concrete into lightweight aggregates with a particle size of 5 mm to 20 mm, soak in water for 1 hour, take it out and dry the surface moisture to obtain pre-wet foamed concrete;

[0036] 3) After diluting the foaming agent with water, add it to the planetary cement mortar mixer, and stir at high speed until a large number of milky white fine and uniform bubbles are produced;

[0037] 4) Add the mixture obtained in step 1 to step 3, and continue to stir f...

Embodiment 3

[0042] Prepare the board-making raw materials in parts by weight as follows: 70 parts of ordinary portland cement, 30 parts of fly ash, 0.5 parts of foaming agent, 18 parts of foamed concrete, 60 parts of water, and 1 part of water reducing agent.

[0043] The preparation method is as follows:

[0044] 1) According to the weight ratio, add 70 parts of ordinary Portland cement and 30 parts of fly ash to the planetary cement mortar mixer in sequence, and stir for 6-10 seconds;

[0045] 2) Break the discarded foamed concrete into lightweight aggregates with a particle size of 5 mm to 20 mm, soak in water for 1 hour, take it out and dry the surface moisture to obtain pre-wet foamed concrete;

[0046]3) After diluting the foaming agent with water, add it to the planetary cement mortar mixer, and stir at high speed until a large number of milky white fine and uniform bubbles are produced;

[0047] 4) Add the mixture obtained in step 1 to step 3, and continue to stir for 3 to 6 seco...

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Abstract

The invention discloses a heat-insulation foamed cement board based on foam concrete wastes. The heat-insulation foamed cement board comprises, by weight, 70-80 parts of ordinary Portland cement, 20-30 parts of fly ash, 0.5-1 part of a foaming agent, 6-24 parts of foam concrete, 55-60 parts of water and 1-1.5 parts of a water reducer. The foam concrete wastes are crushed, sieved and classified toform artificial light aggregates with different particle sizes, and then are added into a foam concrete body to produce the self-heat insulation board. The solid wastes are adopted, so the heat-insulation foamed cement board has low cost; the wastes are changed into effective resources and recycled, so the heat-insulation foamed cement board has the advantages of energy-saving and environmentally-friendly production process, good economic and environmental benefits, increase of the types of energy-saving and heat-insulation wall materials, and improvement of the greenness of an inorganic lightweight material. The heat-insulation foamed cement board produced in the invention has a heat insulation coefficient of 0.06-0.10 w / m.k, a compressive strength of 1 Mpa or more, a bulk density of 490-640 kg / m<3> and a volume water absorption rate of 15-20%.

Description

technical field [0001] The invention relates to a building thermal insulation material, in particular to a cement-based foam thermal insulation board using waste foam concrete and a preparation method thereof. Background technique [0002] The size of foamed concrete waste embryos, waste boards and cutting scraps ranges from a few millimeters to several hundred millimeters, and the strength is low, generally less than 0.5MPa, so it is difficult to be directly used as building materials. The raw materials of foamed concrete board products contain cement ), admixtures, fibers, admixtures, chemical foaming agents, etc. In addition to cement hydration products and unhydrated cement, fibers are wrapped in cement hydration products in waste materials, although these materials are of high value, However, due to the lack of effective separation technology, there are very few studies on the reuse of waste foam concrete. Studies have shown that the regenerated gelled material that ca...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16C04B38/10
CPCC04B18/16C04B28/04C04B38/10C04B2201/20C04B2201/32C04B2201/50C04B18/08C04B22/002C04B24/24C04B2103/304C04B38/0067Y02W30/91
Inventor 薛力梨李嘉倪骁慧刘红飞江海斌门小静
Owner JIAXING UNIV
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