Properties of gypsum composites containing vermiculite and polypropylene fibers: Numerical and experimental results


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GENÇEL O., del Coz Diaz J. J. , SÜTÇÜ M., KÖKSAL F. , Alvarez Rabanal F. P. , Martinez-Barrera G., ...More

ENERGY AND BUILDINGS, vol.70, pp.135-144, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 70
  • Publication Date: 2014
  • Doi Number: 10.1016/j.enbuild.2013.11.047
  • Title of Journal : ENERGY AND BUILDINGS
  • Page Numbers: pp.135-144
  • Keywords: Gypsum composite, Vermiculite, Polypropylene fibers, Thermal conductivity, Mechanical strength, Response surface methodology, Finite element modeling, SELF-COMPACTING CONCRETE, MICRO-ENCAPSULATED PCM, MECHANICAL-PROPERTIES, PHYSICAL-PROPERTIES, PLASTER COMPOSITES, THERMAL-PROPERTIES, DESIGN, OPTIMIZATION, BEHAVIOR, ELEMENT

Abstract

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.