Compatibility between gypsum and polyamide powder waste to produce lightweight plaster with enhanced thermal properties

Abstract This paper presents the results of an experimental study on the use of polyamide powder waste to produce a new lightweight plaster material with improved thermal properties. Plaster blends were prepared using different volumetric proportions of polyamide. The characteristics of the tests specimens were defined and tested by fixing the consistency at a good workability and then determining the mechanical properties, Shore C hardness and the water vapour permeability that correlates with the pore structure obtained with Mercury Intrusion Porosimetry (MIP). The compatibility of the interface zone of materials was analysed using Fast Scanning Electron Microscopy (FSEM), in order to define the effect of the polyamide on the microstructure of the lightweight plaster. Moreover, its thermal behaviour was examined by thermogravimetry and thermal conductivity analysis. Our results show that an increase in the amount of polyamide affects the properties of the plaster, decreasing its density and mechanical properties, as well as increasing its permeability and its thermal resistance. These results confirm that plasters produced with recycled polyamide are comparable to lightweight plasters made with traditional materials.

[1]  E. Kahraman,et al.  Modifications in the properties of gypsum construction element via addition of expanded macroporous silica granules , 2011 .

[2]  V. Calderón,et al.  Properties, characterization and preparation of halogenated aromatic polyamides , 2007 .

[3]  Sabu Thomas,et al.  Thermogravimetric and wide angle X-ray diffraction analysis of thermoplastic elastomers from nylon copolymer and EPDM rubber , 2008 .

[4]  F. Derkx,et al.  Determination of relevant parameters influencing gas permeability of mortars , 2011 .

[5]  S. Gutiérrez-González,et al.  Lightweight plaster materials with enhanced thermal properties made with polyurethane foam wastes , 2012 .

[6]  A. K. Haghi,et al.  Applications of expanded polystyrene (EPS) beads and polyamide-66 in civil engineering, Part One: Lightweight polymeric concrete , 2006 .

[7]  Adnan Çolak.  Physical and mechanical properties of polymer-plaster composites , 2006 .

[8]  M. Gomina,et al.  Investigation of the setting of polyamide fibre/latex-filled plaster composites , 2006 .

[9]  Zhishen Wu,et al.  Preparation and properties of gypsum-based heat storage and preservation material , 2011 .

[10]  M. Beazi-Katsioti,et al.  The assessment of porosity and pore size distribution of limestone Portland cement pastes , 2009 .

[11]  Duc Truong Pham,et al.  Deterioration of polyamide powder properties in the laser sintering process , 2008 .

[12]  Lu Cui,et al.  Permeability and pore structure of OPC paste , 2001 .

[13]  V. Beal,et al.  Statistical evaluation of laser energy density effect on mechanical properties of polyamide parts manufactured by selective laser sintering , 2009 .

[14]  J. Gadea,et al.  Lightweight mortar made with recycled polyurethane foam , 2010 .

[15]  Aivars Aboltins,et al.  Measurements of heat transfer of multi-layered wall construction with foam gypsum , 2007 .

[16]  R. Tubino,et al.  TG and DSC studies on plaster residues as recycled material , 2008 .

[17]  Sam Kubba.  Green Building Materials and Products , 2012 .