THE USE OF ASBESTOS WASTES AS A FILLERS ON SOREL CEMENT

Abstract

The paper presents the results of research on the usefulness of asbestos wastes as Sorel cement fillers. Chrysotile asbestos and cement-asbestos boards were previously pretreated by heat treatment to destroy the fibrous structure of asbestos. The raw materials component used in the study contained from 0 to 40 mass% of calcined asbestos wastes. The setting time, compressive strength at 3, 7 and 28 days of ripening, phase composition and microstructure of Sorel cements were examined. The results of the preliminary studies indicate that calcined asbestos wastes may be used as Sorel cement fillers. Favourable results were obtained with the use of calcined chrysotile asbestos as compared to cement-asbestos.

Keywords

• Magnesium oxychloride cement
• Asbestos containing materials
• Fillers
• Recycling
• Thermal treatment