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标题：Properties of Pavement Quality Concrete with Partial Replacement of Fine Aggregates by Iron Ore Tailings
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作者：Panditharadhya B J ; Sowmyashree T ; Manjunath C S 等
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：5
页码：7399
DOI：10.15680/IJIRSET.2016.0505135
出版社：S&S Publications
摘要：Concrete is the basic material in all construction works and fine aggregates constitute more than 30% ofthe mix. But the procurement of natural sand is getting difficult day by day because of lack of natural source andenvironmental ill effects. From the stage of quarrying the raw materials to the completion of project has resulted instripping of earth for the use of exhaustible resources and has caused an adverse effect on the nature. This has resultedin an acute shortage of fine as well as coarse aggregates, obligating to explore the replacement for these materialswithout compromising the quality, environmental and economic factors. In recent years, almost every mineralproducing country is facing the problem of better utilization of mine waste because of its accumulation and lack ofsuitable storage space. In the present study Iron Ore Tailings (IOT) procured from KudremukhLakya Dam site (KIOCLLtd.) are used as partial replacement to fine aggregates at levels of 10, 20, 30, 40 and 50 percent and the basic materialproperties, strength parameters are studied. It is found that as the IOT percentage increases in the mix workability isreduced. At 40percent replacement level the 28days compressive strength is more than the reference mix and otherreplacement percentage mixes. Flexural strength is observed maximum for reference mix. Quality of concrete mixes isfound good from Ultrasound Pulse Velocity test). Flexural fatigue analysis is carried out on mix with 40percent IOTreplacement at stress ratios 0.65, 0.7 and 0.75 compared with IRC model for number of repetitions using log normaldistribution. Up to 0.7 stress ratio it showed more number of repetitions than IRC and at higher stress ratio mix withIOT achieved failure earlier.
关键词：Iron Ore Tailings; compressive strength; flexural fatigue; ultrasonic pulse velocity; stress ratio; IRC.