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Novel Foam Insulation Material Produced by Calcined Phosphogypsum and H2O2

Cui, Yong / Wang, Qiang / Xue, Junfeng

A novel foam insulation material was prepared using calcined phosphogypsum (CPG) as the raw material and hydrogen peroxide ( $H_{2} O_{2}$ ) as a foaming agent. Stable foaming of $H_{2} O_{2}$ in a CPG-based suspension was achieved. The effects of $H_{2} O_{2}$ on the mechanical properties, thermal conductivity, and pore structure of the CPG-based foam insulation materials were investigated. The results showed that, with increasing $H_{2} O_{2}$ content, the expansion volume increased but the growth rate decreased. The total porosity and macroscale porosity ( $> 100 μm$ ) first increased and then plateaued, while the microscale porosity ( $< 100 μm$ ) first increased and then decreased before plateauing. When the content of $H_{2} O_{2}$ was 4%–5%, CPG-based foam insulation materials with low bulk density ( $\leq 500 kg / m^{3}$ ), low thermal conductivity [ $\leq 0.13 W / (m \cdot K)$ ], and acceptable compressive strength ( $\geq 0.24 MPa$ ) were manufactured; these values are similar to those of other thermal insulation materials, such as cement foam and geopolymer foam in low density ranges.

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Novel Foam Insulation Material Produced by Calcined Phosphogypsum and H2O2

Cui, Yong / Wang, Qiang / Xue, Junfeng

A novel foam insulation material was prepared using calcined phosphogypsum (CPG) as the raw material and hydrogen peroxide ( $H_{2} O_{2}$ ) as a foaming agent. Stable foaming of $H_{2} O_{2}$ in a CPG-based suspension was achieved. The effects of $H_{2} O_{2}$ on the mechanical properties, thermal conductivity, and pore structure of the CPG-based foam insulation materials were investigated. The results showed that, with increasing $H_{2} O_{2}$ content, the expansion volume increased but the growth rate decreased. The total porosity and macroscale porosity ( $> 100 μm$ ) first increased and then plateaued, while the microscale porosity ( $< 100 μm$ ) first increased and then decreased before plateauing. When the content of $H_{2} O_{2}$ was 4%–5%, CPG-based foam insulation materials with low bulk density ( $\leq 500 kg / m^{3}$ ), low thermal conductivity [ $\leq 0.13 W / (m \cdot K)$ ], and acceptable compressive strength ( $\geq 0.24 MPa$ ) were manufactured; these values are similar to those of other thermal insulation materials, such as cement foam and geopolymer foam in low density ranges.

Novel Foam Insulation Material Produced by Calcined Phosphogypsum and H2O2

Cui, Yong / Wang, Qiang / Xue, Junfeng

A novel foam insulation material was prepared using calcined phosphogypsum (CPG) as the raw material and hydrogen peroxide ( $H_{2} O_{2}$ ) as a foaming agent. Stable foaming of $H_{2} O_{2}$ in a CPG-based suspension was achieved. The effects of $H_{2} O_{2}$ on the mechanical properties, thermal conductivity, and pore structure of the CPG-based foam insulation materials were investigated. The results showed that, with increasing $H_{2} O_{2}$ content, the expansion volume increased but the growth rate decreased. The total porosity and macroscale porosity ( $> 100 μm$ ) first increased and then plateaued, while the microscale porosity ( $< 100 μm$ ) first increased and then decreased before plateauing. When the content of $H_{2} O_{2}$ was 4%–5%, CPG-based foam insulation materials with low bulk density ( $\leq 500 kg / m^{3}$ ), low thermal conductivity [ $\leq 0.13 W / (m \cdot K)$ ], and acceptable compressive strength ( $\geq 0.24 MPa$ ) were manufactured; these values are similar to those of other thermal insulation materials, such as cement foam and geopolymer foam in low density ranges.

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Title:

Novel Foam Insulation Material Produced by Calcined Phosphogypsum and H2O2

Contributors:

Cui, Yong (author) / Wang, Qiang (author) / Xue, Junfeng (author)

Published in:

Journal of Materials in Civil Engineering ; 32

Publication date:

2020-09-24

ISSN:

0899-1561 , 1943-5533

DOI:

https://doi.org/10.1061/(ASCE)MT.1943-5533.0003473

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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