A kind of lightweight high-strength foam concrete and its preparation method

A foamed concrete, high-strength technology, applied in the field of building materials, can solve problems such as the reduction of compressive strength, and achieve the effects of increasing strength, reducing density, and being less prone to cracking

Active Publication Date: 2021-09-28
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, ultrafine fly ash and water at 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 cement, ultra-fine fly ash and water by mass ratio 270:200:350 mix uniformly and wet mill 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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PUM

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Abstract

The invention belongs to the technical field of building materials, and specifically discloses a lightweight high-strength foamed concrete and a preparation method thereof. After wet grinding with ultra-fine cement-based slurry, it is mixed with foam stabilizer, foam, and lightweight aggregate according to the mass ratio (250-250- 800): (0.05‑5): (15‑30): (2‑6) Mix evenly, form and cure, and the apparent density of the obtained lightweight high-strength foam concrete is 180‑600kg / m 3 , the compressive strength is 0.8MPa‑8.5MPa, and the thermal conductivity is 0.055‑0.12W / m•K. It is a class A non-combustible material and can be used as a lightweight and 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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Patent Type & Authority Patents(China)
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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