초록 ▼

A method of treating a shell sand by heating it to 300.degree. C. maximum for a time sufficient to remove substantially all of the water and organic content while maintaining substantially all of the inherent porosity of the shell sand. Generally, the time required varies between 10 minutes maximum

A method of treating a shell sand by heating it to 300.degree. C. maximum for a time sufficient to remove substantially all of the water and organic content while maintaining substantially all of the inherent porosity of the shell sand. Generally, the time required varies between 10 minutes maximum at 300.degree. C. to about 1 hour at 95.degree. C. The resulting material is useful in cementitious compositions, particularly mortars, these being characterised by a high flexibility and an exceptionally high degree of resistance to fire or heat.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of preparation of a shell sand derived from molluscs, wherein the shell sand is heated at a temperature not exceeding 300.degree. C. for a time sufficient to remove substantially all of the water and organic content while maintaining substantially all of the in

[ What is claimed is:] [1.]1. A method of preparation of a shell sand derived from molluscs, wherein the shell sand is heated at a temperature not exceeding 300.degree. C. for a time sufficient to remove substantially all of the water and organic content while maintaining substantially all of the inherent porosity of the shell sand.