复合骨料和高强复合骨料混凝土研究

复合骨料系混凝土中的普通骨料被轻骨料取代而成。试验采用三种轻骨料：圆球型和碎石型高强页岩陶粒以及一种陶砂，通过复合骨料中轻骨料取代量对基准高强混凝土的物理力学性质影响的试验研究，确定复合骨料中轻骨料最佳取代量，结果表明，在与基准混凝土保持相同配合比的条件下，复合骨料混凝土的抗压强度能达70MPa以上，与基准高强混凝土强度相当或略高。

High strength and low auto-shrinkage concrete with composite aggregate

The composite aggregate is composed of LWA and normal aggregate.The optimal replacement of normal aggregate by LWA is determined from the testing of the influence of different replacement by LWA on physical and mechanical properties of concrete.Three kinds of LWA(two coarse aggregates and one fine aggregate)are used for testing.The results show that the compressive strength of concrete with composite aggregate can reach 70MPa and more,with the same strength as concrete at the same proportioning.