STRENGTH VARIATION IN STRUCTURAL CONCRETE MADE WITH COARSE AGGREGATE AVAILABLE IN THE VICINITY OF KARACHI

Abstract

Research and Development work was carried out in this regards basic properties of coarse aggregate were studied in the vicinity of Karachi. This project is included R&D of concrete mix 1 : 2 : 4 @ 0.5 W/C (Normal concrete) with various curried ages 3,7,14 and 28days (three, seven, Fourteen and twenty eight).Hilly sand named Bholari is used as fine aggregate and Cement OPC brand named Lucky contents were employed to study  the behavior of two C.A sources My Garri and Raise goth,  available in the vicinity of Karachi. My Gaari source crusher plants are Mubarak , Madina and Tanaawal. Raisegoth source crusher plants are Margala and Abaseen crusher. Engineering properties of C.A were as per guide line British code . Structural concrete research were carried out on the controlled specimen viz. standard cubes (6” x6” x6”). Compressive strength of five different Coarse aggregate made structural concrete were compared along with constant Bholari hilly sand and Lucky cement with configurations of material ratio 1 :2 :4 @ 0.5 W/C and curried age three, seven, fourteen and twenty eight days. Results of the present findings of five coarse aggregates are generally good for the use of this coarse aggregate material in construction. Nevertheless, test results are confirming the suitability of My Gaari based crusher plants coarse aggregate than the Raise goth based coarse aggregates.