聚丙烯纤维超高强石渣混凝土的力学性能研究

低碳聚丙烯纤维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134．9MPa、水泥消耗量低至350kgm-3且具有优异抗火性能的新型环境友好型混凝土。文章进行了11组立方体试件和8组棱柱体试件的抗压试验、9组劈拉试验和8组抗折试验，初步研究了聚丙烯纤维超高强石渣混凝土的力学性能。试验结果表明，在试验参数范围内，聚丙烯纤维超高强石渣混凝土与超高强石渣混凝土的力学特性有其相似之处，也有其自身的特点：在受压变形过程中，泊桑比几乎保持不变，由于聚丙烯纤维的阻裂效应，泊桑比小于超高强石渣混凝土，为0．244；拉压比在1／10．3—1／17．8之间；折压比为1／9．9—1／15．5；变形模量与超高强石渣混凝土相近，在14461MPa-16339MPa之间，小于超高强混凝土数值。

Experimental Studies on Mechanical Properties of Polypropylene Fibre Reinforced Super High Strength Concrete Used Stone-chip

Polypropylene fibre reinforced super high strength concrete used stone-chip （abbreviated to PFRSHSCUS） is a new kind of environmentally friendly concrete with both ultra-high strength being as high as 134.9MPa and excellent antispalling resistance performance at the lower consumption of 350 kgm-3 of cement developed by using local raw materials. Based on the compressive experiment of 11 groups of cubes, 8 groups of prism specimens and splitting tensile tests of 9 groups and flexural strength experiment of 8 groups of GSHSCUS, this paper discusses the mechanics properties such as the split-tensile strength, the flexural strength, the prism compressive strength, modulus of deformation ete of PFRSHSCUS ; it was found that within the factor scope of this test, PFRSHSCUS exhibits the characteristics different from that of super high strength concrete （ abbreviated to SHSC）, with the ratio of its splitting strength and flexural strength to compressive strength ranging from 1/10. 3 - 1/17.8, and 1/9. 9 to 1/15.5 respectively, and Poisson ratio is about 0. 244 higher than that of SHSC or HSC/ HPC ,and modulus of deformation ranging from 14 461 - 16 339 MPa is lower than that of SHSC/HSC, which is the result substituting the stone-chip for sand with the lower specific surface areas than that of the former.