Performance of engineered cementitious composite containing stone slurry powder waste

含石浆粉废弃物工程胶结复合材料的性能

Most of the materials used in engineered cementitious composite are fine in size to achieve ductile nature.Stone slurry powder(SSP)is an inert material obtained from stone industries as by-product which may cause hazardous impact on environment.In this research work,partial replacement of silica sand(SS)and fine sand(FS)by SSP with different contents(25%and 50%each)for making engineered cementitious composite has been explored.The performance was evaluated on the basis of strength,tensile strain,mid span deflection capacity,ultra-sonic pulse velocity and microstructure.Mechanical strength was found to be increased at 25%SSP in both replacements;whereas,strength decreased slightly at 50%replacement.Tensile strain,mid span deflection and quality of concrete were enhanced with increase in SSP content.Using SSP formed denser cementitious composite can help to save the natural resources and contribute in making green cementitious composite.

工程胶结复合材料中使用的大多数材料的晶粒尺寸细小,有较好的韧性。石浆粉(SSP)是石工业中的一种惰性材料副产品,对环境产生有害影响。本文研究了用不同含量(25%和50%)SSP部分替代硅砂(SS)和细砂(FS)来制备工程胶结复合材料。根据强度、拉伸应变、中跨度偏转能力、超声波脉冲速度和微观结构对其性能进行了评价。在两种替换含量下,替换含量为25%时材料强度增加,而替换含量为50%时材料强度略有下降。拉伸应变、中跨度挠度和混凝土质量随着SSP含量的增加而提高。使用SSP形成的冷凝胶复合材料,可以节省自然资源,也促进了绿色胶凝复合材料的制备。