EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF COAL GANGUE SINTERED COMPOSITE INSULATION BLOCKS

Coal gangue sintered composite insulation blocks are new type of wall materials,which integrated the building enclosure and heat preservation. To grasp the mechanical properties of the blocks, tests were conducted, and the compressive strength and flexural strength on three different compression surfaces-the bearing surface, the front and surface of the joint tongue and groove were analyzed. The results showed that the compressive strength on different compression surfaces of composite insulation blocks was different obviously, the strength was the largest for the bearing surface, and the strength was the smallest for the surface of the joint tongue and groove. The flexural strength of composite insulation blocks was affected by its own cracks, and the ratios of bending-compressive strength were more dispersive. The compressive performances of the composite insulation blocks could meet the requirements for the strength grade of the blocks in the bricks & blocks composited insulation materials(GB/T 29060-2012) and the uniform technical code for wall materials used in buildings(GB 50574-2010).