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Light-weight high-strength foam concrete and preparation method thereof

A foam concrete, high-strength technology, applied in the field of building materials, can solve problems such as the reduction of compressive strength, achieve the effects of increased strength, reduced density, and less cracking

Active Publication Date: 2019-10-11
郑州工大高新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The field of building materials in my country is advocating a green economy and a low-carbon economy. Therefore, the utilization of waste resources, thermal insulation and energy saving, and thermal insulation materials have become important development directions for today's building materials; cement foam concrete has light weight, thermal insulation, heat insulation, sound insulation, Fireproof and vibration-absorbing properties, the apparent density of commonly used cement foam concrete is 300kg / m 3 ~1200kg / m 3 , the compressive strength is 0.5MPa~15.0MPa, and the thermal conductivity is greater than 0.085W / (m•K). It can be used in the production of blocks, light boards and other fields. There is a close relationship between the performance and density of cement foam concrete. Ground, as the density decreases, the thermal conductivity of cement foam concrete decreases, and the thermal insulation and sound insulation effects improve, but the compressive strength decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix cement, mineral admixture and water uniformly at a mass ratio of 150:25:90 and wet grind for 10 minutes to obtain material A; then use material A, foam stabilizer, foam produced by surfactant foaming agent and EPS particles Mix evenly according to the mass ratio of 745:2:20:6 (first mix the cement-based slurry and foam stabilizer evenly, then add foam and mix evenly, and finally add lightweight aggregate and mix evenly), pour it into the plate mold, and let it stand 8h, and then the plate with the mold is cured at a temperature of 50-75°C for 1 day and then demoulded, and the plate after demoulding is cured under natural conditions for another 7-14 days, and the dry apparent density of the product is measured to be 600kg / m 3 , the compressive strength is 3.8MPa, and the thermal conductivity is 0.12W / m·K. The equipment used in the cement wet grinding process is a kind of ball mill, colloid mill and stirring mill; the cement is six kinds (silicate Portland cement, ord...

Embodiment 2

[0023] The difference between Example 2 and Example 1 is that: material A is obtained by mixing cement, ultra-fine fly ash and water in a mass ratio of 150:25:125 and wet grinding for 55 minutes; then material A, magnesium aluminum silicate , The foam produced by the surfactant foaming agent and EPS particles are mixed evenly at a mass ratio of 800:2:15:6, poured and molded, and cured at 50°C for 7 days. The dry apparent density of the product is measured to be 600kg / m 3 , the compressive strength is 8.5MPa, and the thermal conductivity is 0.12W / m•K.

Embodiment 3

[0025] The difference between embodiment 3 and embodiment 1 is: by mixing cement, superfine fly ash and water according to mass ratio 270:200:350 and wet milling 60min to obtain A material; then by A material, sodium bentonite, The foam produced by the surfactant-type foaming agent and EPS particles are mixed evenly at a mass ratio of 250:5:30:4, poured and molded at 75°C for 3 days. Measure the dry apparent density of the product to be 180kg / m 3 , the compressive strength is 0.8MPa, and the thermal conductivity is 0.055W / m•K.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to light-weight high-strength foam concrete and a preparation method thereof. The light-weight high-strength foam concrete is prepared by enabling superfine cement-based slurry to be uniformly mixed with a foam stabilizer, foam and a light-weight aggregate according to a mass ratio of (250-800):(0.05-5):(15-30):(2-6) and wet-milling, forming and maintaining, wherein the obtained light-weight high-strength foam concrete is 180-600 kg / m<3> in apparent density, 0.8-8.5 MPa in compressive strength, 0.055-0.12 W / m-k in heat conductivity coefficient, belongs to a A-stage incombustible material, and can be used as a light-weight high-strength composite wallboard.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a lightweight high-strength foam concrete and a preparation method thereof. Background technique [0002] The field of building materials in my country is advocating a green economy and a low-carbon economy. Therefore, the utilization of waste resources, thermal insulation and energy saving, and thermal insulation materials have become important development directions for today's building materials; cement foam concrete has light weight, thermal insulation, heat insulation, sound insulation, Fireproof and vibration-absorbing properties, the apparent density of commonly used cement foam concrete is 300kg / m 3 ~1200kg / m 3 , the compressive strength is 0.5MPa~15.0MPa, and the thermal conductivity is greater than 0.085W / (m•K). It can be used in the production of blocks, light boards and other fields. There is a close relationship between the performance and density of cemen...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/08C04B38/10
CPCC04B28/04C04B28/08C04B38/106C04B2201/20C04B2201/32C04B2201/50C04B18/08C04B14/28C04B16/08C04B2103/48C04B14/041C04B14/104
Inventor 赵振波郑娟荣
Owner 郑州工大高新材料科技有限公司
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