新型大坝混凝土材料的抗裂性能研究

Research of resist_cracking behavior of roller concrete

本文通过建立评价混凝土抗裂性指标———材料的脆性系数，研究了材料的脆性系数与碾压混凝土的极限拉伸、抗拉强度、弹性模量与绝热温升等之间的联系。结果表明：由低碱度钢渣大坝水泥配制碾压混凝土有利于降低混凝土的脆性系数，提高材料的抗拉强度和极限拉伸值，减小混凝土的绝热温升，从而改善碾压大坝混凝土的抗裂性。

Based on establishing of brittleness modulus used for evaluating concrete resistcracking behavior,the relations between brittleness of materials and properties of roller concrete such as ultimate elongation,bending strength,elastic modulus and thermal insulation temperature_rising are studied.It has been shown that using steel_based dam concrete with lover_basicity to make up the roller concrete is favorable to slow down the brittleness of concrete,to increase bending strength and ultimate elongation of materials,to let up thermal insulation temperature_rising of concrete so as to improve the resist_cracking behavior of roller concrete. [