期刊
ENERGY AND BUILDINGS
卷 70, 期 -, 页码 135-144出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2013.11.047
关键词
Gypsum composite; Vermiculite; Polypropylene fibers; Thermal conductivity; Mechanical strength; Response surface methodology; Finite element modeling
资金
- GICONSIME Research Team in the University of Oviedo
- Bartin University
- FICYT
- Spanish Ministry of Science and Innovation
- FEDER [FC-10-EQUIP10-17, BIA2012-31609]
- Gijon City Council [SV-13-GIJON-1.7]
We have added expanded vermiculite and polypropylene fibers with low thermal conductivity to lightweight gypsum. Thermal conductivity of the composites decreases on addition of vermiculite as pore-maker. Physical and mechanical properties of the composites are improved by incorporating polypropylene fibers. A nonlinear finite element model of a three point bending model and a design of experiments analysis have been developed to evaluate and optimize the additive concentrations and also to understand the effects provided by the additives on the mechanical strength. Statistical response surface method with three-level factorial was employed to evaluate the effect of addition of vermiculite and polypropylene fibers on gypsum composites. Our methodology can be applied to other nonlinear materials for property optimization. (C) 2013 Elsevier B.V. All rights reserved.
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