Abstract
This paper discussed effects of organic matters/inorganic matters (OM/IM) ratios on the physical property, porosity and expansibility of ultra-light sewage sludge ceramsite (ULSC). The results indicated that ULSC with the high expansion and low water absorption were obtained when the OM/IM ratios were between 0.16 and 0.24. The OM/IM ratios had great effect on magnitude of physical forces of EF and ST; the relationship between EF and ST could determine pores formation and expansion of ULSC. Na-Ca feldspars of ceramsite grew as OM/IM ratios increased and the sintering process made some components of raw materials transform into other crystals having better thermostability.
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