Structural and Thermal Efficiency of Composite Precast Sandwich Panels: A State-Of-The-Art

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2021 by IJETT Journal
Volume-69 Issue-9
Year of Publication : 2021
Authors : Sakhimol B, V.G.Kalpana
  10.14445/22315381/IJETT-V69I9P222

MLA 

MLA Style: Sakhimol B, V.G.Kalpana "Structural and Thermal Efficiency of Composite Precast Sandwich Panels: A State-Of-The-Art" International Journal of Engineering Trends and Technology 69.9(2021):179-192. 

APA Style: Sakhimol B, V.G.Kalpana. Structural and Thermal Efficiency of Composite Precast Sandwich Panels: A State-Of-The-Art International Journal of Engineering Trends and Technology, 69(9),179-192.

Abstract
Novel energy-efficient approaches to new construction practices like precast insulated sandwich wall panels can reduce the energy consumption for thermal comfort inside the building. Precast insulated sandwich wall panel (PISWP) is made up of two or more structural layers (structural wythes) separated by a low-density insulation material with good thermal resistance. Shear connections are used to link the structural wythe with the insulating layers. The most commonly used connector material is steel, but it reduces the thermal efficiency of the insulated panels by acting as a thermal bridge across the wythes. Other materials like fibre reinforced materials (FRP) gain attention recently and investigations are going on to find their suitability in achieving composite actions. This paper outlines an overall review of the response of precast insulated panels, properties of insulation material and structural behaviour of shear connectors. It also looks at how well-insulated sandwich panels keep their heat in. Expanded polystyrene (EPS) and extruded polystyrene (XPS) have been proved to be effective insulating materials in the past. Superior thermal and corrosion resistance properties of FRP made it a pertinent material for shear connectors in sandwich wall panels. Fully composite action can be achieved if the shear ties are selected as per specifications and appropriately distributed but still, some undesirable properties like bond-slip, FRP failure, etc. are there. So an intensive experimental study is needed to identify the proper shear connector system that will provide both structural and thermal efficiency to the panels. Also, studies are needed to study the comparability of different insulation materials available in the market in terms of thermal efficiency.

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Keywords
Insulated sandwich wall panel, FRP, thermal efficiency, shear connector, Expanded Polystyrene(EPS), Extruded Polystyrene(XPS).