期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 94, 期 -, 页码 620-628出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.07.058
关键词
Thermal property; Recycled aggregate concrete; Thermal conductivity; Influence coefficient of recycled aggregate; Recycled concrete block
资金
- project of Shaanxi Province Excellent Young Scholars [2013KJXX-53]
- China Scholarship for Study Abroad
- Program for Changjiang Scholars and Innovative Research Team in University
- Innovation Team of Xi'an University of Architecture and Technology
This paper investigated the thermal properties of recycled aggregate concrete (RAC) and recycled concrete block. Considering the effect of four factors, an orthogonal test was conducted to study the thermal conductivity of RAC. The thermal conductivities of large particle recycled aggregate concrete (LRC) and recycled brick concrete (RbC) were also tested at different replacement ratio of recycled aggregate. By defining an influence coefficient c, the effect of recycled concrete aggregate (RCA) on thermal conductivity of RAC was better explained. A modified formula was also proposed to calculate the thermal conductivity of RAC based on that of normal concrete. The thermal resistance of recycled concrete block was calculated, and an experiment on the heat transfer coefficient of recycled concrete block wall in practical engineering was conducted. The study shows that the recycled coarse aggregate has the greatest influence on thermal conductivity of RAC. There is a significant linear relationship between the influence coefficient c and the thermal conductivity of RAC. The results calculated from modified formula for thermal conductivity of RAC agreed basically with the test results. (C) 2015 Elsevier Ltd. All rights reserved.
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