期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：10
页码：18618
DOI：10.15680/IJIRSET.2016.0510070
出版社：S&S Publications
摘要：Concrete is the most versatile construction material because it can be designed to withstand harshestenvironments while taking on the most inspirational forms. Nowadays, most concrete mixture contains supplementarycementitious material which forms part of the cementitious component. The main benefits of SCMs are their ability toreplace certain amount of cement and still be able to display cementitious property, thus reducing the cost of usingPortland cement. The fast growth in industrialisation has resulted in tons and tons of by-product or waste materials,which can be used as SCMs such as Fly Ash, Silica Fume, Ground Granulated Blast Furnace Slag, Steel Slag, etc. Theuse of these by-products not only helps to utilise these waste materials but also enhances the properties of concrete infresh and hardened states. Perhaps the most successful SCM is silica fume because it improves both strength anddurability of concrete to such extent that modern design rules call for the addition of silica fume for design of highstrength concrete. To design high strength concrete good quality aggregates is also required.In the present work a series of tests were carried out to make comparative studies of various mechanical properties ofconcrete mixes prepared by using Reliance OPC 43 grade cement. The mixes are modified by 7.5%, 10% and 12.5% ofsilica fume in replacement. After optimizing the percentage of silica fume, the silica fume is then blended with fly ash,keeping the percentage of cement fixed. The optimum percentage of silica fume comes out to be 10%. The fineaggregate used is natural sand comply to zone III as per IS: 383-1982. The properties studied are 7 days and 28 dayscompressive strength; 28 days split tensile strength and 28 days flexural strength.
关键词：Supplementary cementitious materials; fly ash; silica fumes; strengths of concrete.
