Physical properties and compressive strength of the technical plaster and local juss

الملخص EN

Five physical properties (water/powder ratio, setting time, fineness, porosity and dendsity) and compressive strength were determined and compared for technical plaster and local juss.Data were monitored using a standard dental stone.

The relationships between these properties were also studied.

It was revealed that local juss has inferior properties compared with technical plaster.

It has lower compressive strength; higher water/powder ratio; shorter setting time; larger grain size and higher porosity.

There is an inverse relationship between compressive strength and the two properties water/powder ratio and porosity.

There is a direct relationship between compressive strength and the two properties particle size and density.

There is also a direct relationship between setting time and the two properties particle size and water/powder ratio.