Study on Influences of Activity Mineral Admixture on Mechanical Properties of High Performance Lightweight Aggregate Concrete

摘要

In this paper, HPLWAC whose oven-dry apparent densities are 1850～1930 kg/m~3, slump values are 135～ 150mm, and cubic compressive strength are high to 70MPa at the age of 28d, are successfully produced using fly ash-shale high strength aggregates, and mixing appropriate proportion of GGBS and FA; And the influences of GGBS and FA on mechanical properties of HPLWAC are studied. Results show the effect of mixing GGBS is better than that of mixing FA; furthermore, with the increase of the strength of HPLWAC, its brittleness rises either, which can be proved by the stress-strain curves of HPLWAC in uniaxial compression.