双掺陶粒轻质高强混凝土的力学及 耐久性能试验研究.

In order to make the concrete have a higher strength with a lower dry apparent density and better durability, the clay and shale ceramsites were incorporated into the concrete, aiming to explore a method for preparing Lightweight High- Strength Concrete(LWHSC) with 28 d dry apparent density not exceeding 1 950 kg/m3 and 28 d strength not less than 50 MPa. The effects of clay and shale ceramsites on compressive strength, dry apparent density and durability of LWHSC were studied. The results show that the failure pattern of the compressive strength specimens of LWHSC prepared is no different from that of ordinary concrete, but the dry apparent density of LWHSC can be effectively reduced by partially replacing shale ceramics with clay ceramics. Proper increase of cementitious materials and the optimization of the co-doping ratio of ceramsites can improve the durability property of other materials except frost resistance. The research results can provide reference for understanding, optimizing and developing LWHSC co-doped with shale and clay ceramsite and its application in engineering. [ABSTRACT FROM AUTHOR]