LIME-FLY ASH CEMENTITIOUS MIXTURE WITH IMPROVED HARDENING AND EXPANSION CHARACTERISTICS

摘要

Cementitious mixture comprised of fly ash and lime-sulfate material, as contrasted with lime as used in conventional mixtures, hardens more rapidly and has improved characteristics with respect to dimensional stability. Preferably, the lime-sulfate material is made by the addition of sulfuric acid solution to quicklime in a modified lime hydration process. Alternatively, the lime-sulfate material may comprise lime and a separate sulfate compound such as gypsum. The cementitious mixture of this invention may be used, alone or in conjunction with filler material, as a subsurface base material or as a soil stabilization agent. It may also find use as a land fill or in making pre-stressed structural members.