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A platform for research: civil engineering, architecture and urbanism
Investigation of the properties of high-porosity cement foams based on ternary Portland cement–metakaolin–silica fume blends
https://orcid.org/0000-0001-8467-1650
Highlights The pre-foaming method was successfully used to prepare high-porosity cement foams. The addition of metakaolin and silica fume hinders the collapse of fresh high-porosity cement foam. The air-void structure of high-porosity cement foam can be stabilized by the addition of metakaolin and silica fume. Cement foam with a compressive strength of 0.74MPa and thermal conductivity of 0.054W/mK at 91.6% was achieved.
Abstract High-porosity cement foams based on ternary blends of Portland cement, metakaolin and silica fume were prepared by the pre-foaming method. The effects of ternary blends on the early-age properties, air-void structure and hardened state properties of cement foams were investigated. The effect of metakaolin and silica fume on stabilizing air-voids was observed, and the collapse of cement foams during the hardening process was avoided by addition of metakaolin. Moreover, the compressive strength of the prepared 91% high-porosity cement foams was enhanced by addition of metakaolin and silica fume. The compressive strength and thermal conductivity reached 0.74MPa and 0.054W/mK, respectively. However, metakaolin and silica fume had a negative impact on the workability of the cement foam.
Investigation of the properties of high-porosity cement foams based on ternary Portland cement–metakaolin–silica fume blends
https://orcid.org/0000-0001-8467-1650
Highlights The pre-foaming method was successfully used to prepare high-porosity cement foams. The addition of metakaolin and silica fume hinders the collapse of fresh high-porosity cement foam. The air-void structure of high-porosity cement foam can be stabilized by the addition of metakaolin and silica fume. Cement foam with a compressive strength of 0.74MPa and thermal conductivity of 0.054W/mK at 91.6% was achieved.
Abstract High-porosity cement foams based on ternary blends of Portland cement, metakaolin and silica fume were prepared by the pre-foaming method. The effects of ternary blends on the early-age properties, air-void structure and hardened state properties of cement foams were investigated. The effect of metakaolin and silica fume on stabilizing air-voids was observed, and the collapse of cement foams during the hardening process was avoided by addition of metakaolin. Moreover, the compressive strength of the prepared 91% high-porosity cement foams was enhanced by addition of metakaolin and silica fume. The compressive strength and thermal conductivity reached 0.74MPa and 0.054W/mK, respectively. However, metakaolin and silica fume had a negative impact on the workability of the cement foam.
Investigation of the properties of high-porosity cement foams based on ternary Portland cement–metakaolin–silica fume blends
https://orcid.org/0000-0001-8467-1650
Highlights The pre-foaming method was successfully used to prepare high-porosity cement foams. The addition of metakaolin and silica fume hinders the collapse of fresh high-porosity cement foam. The air-void structure of high-porosity cement foam can be stabilized by the addition of metakaolin and silica fume. Cement foam with a compressive strength of 0.74MPa and thermal conductivity of 0.054W/mK at 91.6% was achieved.
Abstract High-porosity cement foams based on ternary blends of Portland cement, metakaolin and silica fume were prepared by the pre-foaming method. The effects of ternary blends on the early-age properties, air-void structure and hardened state properties of cement foams were investigated. The effect of metakaolin and silica fume on stabilizing air-voids was observed, and the collapse of cement foams during the hardening process was avoided by addition of metakaolin. Moreover, the compressive strength of the prepared 91% high-porosity cement foams was enhanced by addition of metakaolin and silica fume. The compressive strength and thermal conductivity reached 0.74MPa and 0.054W/mK, respectively. However, metakaolin and silica fume had a negative impact on the workability of the cement foam.
Investigation of the properties of high-porosity cement foams based on ternary Portland cement–metakaolin–silica fume blends
Jiang, Jun (author) / Lu, Zhongyuan (author) / Niu, Yunhui (author) / Li, Jun (author) / Zhang, Yuping (author)
Construction and Building Materials ; 107 ; 181-190
2015-12-24
10 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016