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100			_aBhatti Asif Ali _a09MCEM10 _aSupervisor Prof. Dr. Bashir Ahmed Memon
245			_aBehavior of Concrete Slab With Recycle Concrete As Coarse Aggregates (ME Theses)
260			_aNwabshah: _bQUEST, _c2014.
300			_a67p.
500			_aABSTRACT Growing population and shifting from rural to urban areas have posed lest of problem. One among them is the accommodation particularly in areas Where space. problem is dominant's has construction of new building with more accommodation. space in place of old structures is necessary. This produce huge quantum of concrete waste this waste generally goes to landfill which need good resources to deal with the problem. An automotive of it is to make use of concrete waste in new construction. Therefore research to evaluate such possibilities started and is active these days. This research were conducted experimental evaluation of strength deflection and cracking behavior of reinforced of concrete slabs made with recycled aggregate from demolished concrete waste as partial replacement of natural coarse aggregate. The replacement is done in 50%, 60%, 70% and 80% proportion to compare the results one batch of slab is cost with 100% natural aggregate. Demolished concrete is collected from various location of Nawabshah. Bulky pieces of concrete are hammered down the maximum size of I " inch followed by evaluation of basic properties of aggregate. In addition to slabs, four cylinders from each batch of concrete are also prepared to evaluate compressive strength. For all batches of concrete 1:2:4 is used with 0.45-0.55 water cement ratio. Cylinders are tested for compressive strength and maximum reduction in strength is obtained as 12.6% for 50% replacement of natural coarse aggregate with recycled concrete aggregate. All slabs are tested by applying central point load. Average reduction in load carrying capacity is recorded as 7.1% for 50% replacement of natural aggregates. Maximum deflection recorded is 4.4mm which is with in allowable limits of ACI 318. Cracking behavior of all slabs is also observed and it is found that cracking pattern remained almost same for all models how ever reduction in cracking load with increased percentages of recycled aggregate is recorded. Based on result it is concluded that coarse aggregates from demolished concrete can effectively be used in reinforced.
700			_aDepartment of Civil Engineering
856			_uhttps://tinyurl.com/429hhmz6
942			_cTHESIS