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Low-cost ultra low density foam concrete

A foam concrete and ultra-low density technology, applied in the field of lightweight building materials, can solve the problems of difficult large-scale production and sustainable development, lack of mineral resources, difficult molding control, etc., to meet the requirements of large-scale production and sustainable development, High environmental friendliness and low cost effect

Active Publication Date: 2013-07-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this patent are: is prepared by chemical foaming method, and the molding control is difficult; The cement is sulphoaluminate cement, which belongs to special cement
The main disadvantage of this patent is that it is necessary to add ultra-light aggregates or organic binders to prepare by physical foaming, and ultra-light aggregates such as polystyrene particles, expanded perlite or expanded vermiculite are not flammable. , that is, there is a lack of mineral resources, high cost, and difficulty in large-scale production and sustainable development, and the raw materials for producing expanded perlite and expanded vermiculite are lacking in my country, and their prices have risen many times, such as expanded perlite vitrified microbeads. The price has risen from about 1,500 yuan per ton to about 2,700 yuan per ton at present, and the supply is still in short supply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composition and weight percent of a kind of low-cost ultra-low density foamed concrete are:

[0021] Ordinary Portland cement 70% Class III fly ash 0.1%

[0022] Finely ground blast furnace slag powder 15.39% Expanding agent 5%

[0023] Filler 9% Foaming agent 0.5%

[0024] Fiber 0.01%

[0025] Among them: the filler is ground fine sand passed through a 100-mesh sieve; the fiber is polypropylene fiber.

Embodiment 2

[0027] The composition and weight percent of a kind of low-cost ultra-low density foamed concrete are:

[0028] Ordinary Portland cement 30% Class I fly ash 9.5%

[0029] Finely ground blast furnace slag powder 30% Expanding agent 30%

[0030] Filler 0% Blowing agent 0.4%

[0031] Fiber 0.1%

[0032] Wherein: the filler is ground sand passed through a 100-mesh sieve; the fiber is glass fiber.

Embodiment 3

[0034] The composition and weight percent of a kind of low-cost ultra-low density foamed concrete are:

[0035] Ordinary Portland cement 39.9% Class I fly ash 30%

[0036] Finely ground blast furnace slag powder 0.1% Expanding agent 9.55%

[0037] Filler 15% Foaming agent 0.45%

[0038] Fiber 5%

[0039] Wherein: the filler is ground fine sand passed through a 100-mesh sieve; the fiber is basalt fiber.

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Abstract

A low-cost ultra low density foam concrete belongs to the technical field of lightweight building material. The low-cost ultra low density foam concrete comprises ordinary portland cement, fly ash, ground blast furnace slag powder, expanding agent, filling material, foaming agent and fiber. The low-cost ultra low density foam concrete of the invention has characteristics of ultra low density lessthan 200 kg / m<3>, low coefficient of thermal conductivity less than 0.058 W / (m.K), incombustibility, insulation, high fireproofing performance reaching national fireproofing requirement grade A, common and easily available raw materials, low cost, strong practicality, convenience for popularization and application, no high temperature processing or autoclaved cure during preparation, good energy saving and emission reduction effect and benefit for environmental protection, etc. The foam concrete can be widely applied as a lightweight building material, and especially as a core filling material for a self-heat conserving building block and an insulation heat insulation material for position having relative low requirement on strength, and is an excellent ultra lightweight inorganic insulation heat insulation material.

Description

technical field [0001] The invention belongs to the technical field of lightweight building materials, in particular to low-density foamed concrete. Background technique [0002] With the implementation of my country's wall reform and building energy-saving policies, according to the spirit of the Ministry of Public Security of the People's Republic of China on Further Clarifying the Relevant Requirements for Fire Supervision and Management of Civil Building External Thermal Insulation Materials (Gong Xiao [2011] No. 65), modern buildings are required to use The advanced material has the properties of light weight, high strength, heat preservation, heat insulation, waste utilization, energy saving, and non-combustibility. Foamed concrete, as a new type of building material, possesses the above-mentioned properties and is widely used in modern construction projects. Currently the most demanded in the market is density below 200 kg / m 3 ultra-low density foam concrete. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/02
Inventor 俞心刚许宏超龚毅黄海珂林琳吴迪郝浩王洪飞
Owner CHONGQING UNIV