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Comparable Analysis of Engineering Properties between Crushed Hardrock Dust of Maddhyapara Granite M

Corresponding Author : Tareq-Uz-Zaman (dmfh75@yahoo.com)

Authors : M. Farhad Howladar (dmfh75@yahoo.com), M. Ahmed (dmfh75@yahoo.com), Mohammed Omar Faruque (dmfh75@yahoo.com), Golam Hossain (dmfh75@yahoo.com)

Keywords : Crushed hardrock, Sand, Engineering Properties

Abstract :

This paper reports the experimental study undertaken to investigate some engineering properties of crushed hardrock dust of Maddhyapara Granite Mine (MGM), Dinajpur and natural sand. Engineering properties of these two materials have been compared to draw a conclusion for whether crushed hardrock dust can be used as an alternative of sand in construction work. The properties that were determined are fineness modulus, bulk specific gravity, apparent specific gravity, absorption capacity, unit weight, percentage of voids and relative density. Besides, the 28th day compressive strength of concrete specimens, in which complete replacement of sand with crushed hardrock of MGM was practiced, is measured. Three different ratios (by weight) of cement, fine aggregates and coarse aggregates were taken into consideration for making the concrete specimens and the ratios are 1:1.5:3, 1:2:4, 1:2.5:5. Water-Cement ratio was taken as 0.56. Results obtained indicate that the incorporation of crushed hardrock of MGM into the concrete mix as complete replacement material to natural sand resulted in higher compressive strength. From this research it is obvious that the crushed hardrock of MGM could be used to replace natural sand in general concrete structures.  

Published on December 30th, 2012 in Volume 19, Issue 2, Applied Sciences and Technology