Strength and Durability Properties of Concrete Containing Quarry Rock Dust as Fine Aggregate

Quarry rock dust is investigated as fine aggregate in replacement with sand in cement concrete admixture, as the properties of the rock dust are suspected to be as good as sand. This Paper presents the practicability of using quarry rock dust as partial replacement for river or sharp sand using design mix of M20 grade concrete with replacement of 0 %, 20 %, 40 %, 60 %, 80 % and 100 % of quarry dust considered for laboratory analysis in Slump test, water absorption test and compressive strength of the hardened concrete admixture. After 7 days of curing, at maximum load, 13.78 N/mm2 was recorded for the control specimen as compressive strength while the cube with 80 % dust recorded 16.01 N/mm2 at maximum load as average compressive strength respectively, giving rise to an increment of 16.43 % of the compressive strength of the control specimen. Also the cube with 100 % quarry dust recorded 16.83 N/mm2 at maximum load as average compressive strength, giving rise to an increment of about 18 % of the compressive strength of the control specimen. Through reaction with the concrete admixture, quarry dust, thus show improved pozzolanic reaction, micro aggregate filling and concrete durability.