strength of aggregate types ,significance and tests I need report with 5 page at less

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Civil Engineering

strength of aggregate types ,significance andtests
I need report with 5 page at less

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1 Concept and significance of the Aggregate crushing value test The aggregate crushing value test gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load Aggregate crushing value is defined as the percentage by weight of the crushed or finer material obtained when the test aggregates are subjected to a specified load under standardized conditions and the strength of the aggregate used in road construction is expressed by numerical index Aggregates with lower crushing value shows a lower crushed fraction under load and would give a longer service life to the road and hence a more economical performance If we used a weaker would get crushed under traffic loads would produce smaller pieces not coated with binder and these would be easily displaced or loosened out resulting in loss of the surface layer Due to this reason the aggregates used in road construction must be strong enough to withstand crushing under roller and traffic Objectives To determine the crushing value of aggregate for road aggregates To determine suitability of aggregates for use in different types of road pavements Apparatus The appar atus for the standard aggregate crushing test as per IS 23861963 Part IV consist of the following The test moulda 152 cm diameter open ended steel cylinder with square base plate plunger having a piston of diameter 15 cm a rod could be inserted for lifting or placing the plunger in the cylinder with a provided hole across the stem of the plunger A straight metal tamping rod of circular crosssection 16mm in diameter and 45 to 60 cm long rounded at one end A balance of See Answer

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