No abstract

Using steel slag, fly ash and clay as physical materials, cement, expanded perlite and methyl cellulose as additives, the raw materials were ground, bullied, aged, cured and prepared into lightweight and high strength ceramsite. The effects of steel slag, fly ash, clay and cement on the packing density and cylinder compression strength of unburned ceramsite were studied by single factor variable analysis, and the optimum mixing ratio of hot stuffing steel slag, air-quenched steel slag and other raw materials was also studied. Finally, the ratio of fly ash to clay is 40:50:10 and the optimum content of cement is 10%. The content of expanded perlite is 2%. The content of methyl cellulose is 1%. The accumulation density of unburned ceramsite is 943.5kg/m3, and the compressive strength of the tube is 8.153 MPa. Through scanning electron microscope (SEM) and energy spectrum analysis, the microstructure of ceramsite has many small and irregular vitreous composition, most of which are composed of silicate and carbonate. Loose and porous cellular structure is formed between vitreous body and vitreous body, which leads to small volume density of ceramsite.