Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 91, Issue -, Pages 133-137Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.05.032
Keywords
Cement-based foams; Mechanical air-entraining method; Pore structure; Porosity; Thermal conductivity
Categories
Funding
- National Natural Science Foundation of China [51278419]
- Science & Technology Research and Development Program of Shaanxi Provincial [2011K07-33]
- Scientific Research Program - Shaanxi Provincial Education Department [2013JK0945]
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High porosity cement-based foam materials were prepared through physical air-entraining method and the pore structure and the properties of materials were characterized. The results show that water-cement ratio and Hydroxypropyl Methyl Cellulose (HPMC) content have crucial influence on material properties. When the water-cement ratio was 0.9 and the content of HPMC was 0.4%, the cement-based foam material with the porosity of 94.33% and thermal conductivity value of 0.049 W/(m K) could be obtained. The formation mechanism of pore structure was analyzed that water-cement ratio and HPMC content affect the bubble film toughness which influence on material properties. (C) 2015 Elsevier Ltd. All rights reserved.
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