低碳超高强石渣混凝土的力学性能试验研究

低碳超高强石渣混凝土是利用地方原材料自主研发的强度高达131.1MPa、水泥消耗量低至350 kgm-3的新型环境友好型混凝土.本文进行了23组立方体试件和10组棱柱体试件的抗压试验、21组劈拉试验、11组抗折试验,初步研究了超高强石渣混凝土的力学性能,包括劈裂抗拉强度、抗折强度、轴心抗压强度、变形模量等.试验结果表明,超高强石渣混凝土具有与超高强混凝土迥然不同的力学特性：受压变形过程中,泊桑比几乎保持不变,其值高于超高强混凝土的数值,达到0.256;拉压比在1/11.7-1/17.8之间;折压比为1/8.9-1/15.1;变形模量在12586-16905MPa之间,小于超高强混凝土、高强混凝土的数值,经分析后认为石渣比表面积比河砂大是导致变形模量偏低的原因.

Experimental Studies on the Mechanical Properties of Green Super High Strength Stone-chip Concrete

Green Super high strength stone-chip concrete（GSHSSC） is a new kind of environmentally friendly concrete with ultra-high strength being as high as 131.1MPa at the lower consumption of 350 kgm-3 of cement developed by using local raw materials.Based on the compressive experiment of 23 groups of cubes,10 groups of prism specimens and splitting tensile tests of 21 groups and flexural strength experiment of 11 groups of GSHSSC,this paper discussed the mechanics properties such as the split-tensile strength,the flexural strength,the prism compressive strength,modulus of deformation etc of GSHSSC;experimental results show that,GSHSSC exhibits the characteristics different from that of super high strength concrete（SHSC）,with the Poisson ratio about 0.256 higher than that of SHSC nearly remain unchanged during the compression,and the ratio of its splitting strength and flexural strength to compressive strength ranging from 1/11.7 to 1/17.8,and 1/8.9 to 1/15.1 respectively,and modulus of deformation ranging from 12586-16905MPa is lower than that of SHSC/HSC resulting from the stone-chip substituting for sand with the less specific surface than that of the former.