Mechanical strength and thermal conductivity of low-porosity gypsum plates

AUTOR(ES)

Correia, Conceição de Maria Pinheiro, Souza, Milton Ferreira de

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2009-03

RESUMO

The thermal conductivity and mechanical strength of gypsum and gypsum-cellulose plates made from commercial plaster by a new process have been measured. The gypsum parts made by the new process, 'novogesso', have high mechanical strength and low porosity. The gypsum strength derives from both the high aspect ratio of the gypsum crystals and the strong adhesion among them by nano-flat layers of confined water, which behaves as supercooled water. Another contribution to the strength comes from the nano-flatness of the lateral surfaces of the gypsum single crystals. The bending and compression strengths, σB and σc, of gypsum plates prepared by this new technique can be as high as 30 and 100 MPa, respectively. The way gypsum plates have been assembled as well as their low thermal conductivity allowed for the construction of a low-cost experimental house with thermal and acoustic comfort.

Documentos Relacionados

• The effect of reinforcement volume ratio on porosity and thermal conductivity in Al-Mgo composites
• Propriedades mecânicas do gesso de alto desempenho
• Thermal Conductivity and Mechanical Properties of As-Cast and As-Extruded Mg-Zn-Mn Alloys
• The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites
• The origin of the boson peak and thermal conductivity plateau in low-temperature glasses