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The IUP Journal of Structural Engineering :
An Experimental Investigation on Selected Durability Properties of Granite-Fines Concrete
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The levels of natural sand, a construction material, are depleting and at the same time, demand for new construction is increasing. In this paper, an attempt has been made to replace natural sand with granite fines by adopting M20 grade concrete with a mix design of 1:1.73:3.1 of cement:natural sand and granite powder:gravel at proportions of 0, 10%, 20%, 30% and 40% with a water cement ratio of 0.5. Acid durability test was conducted on concrete cube specimen after 28 days water curing and 62 days soaking in hydrochloric acid. After completion of this procedure, concrete cubes are tested for compressive strength and compared with compressive strength of cubes which are not soaked in HCl after 90 days. The cost analysis is done to ensure usage of granite fines as replacement of natural sand does not vary the cost of project significantly. XRD analysis was done to find out the reasons for the improvement of durability for different proportions of granite fines in concrete.

 
 

Natural sand is a material which has been used over the decades as a construction material and has proven that it is a magnificent material; it is becoming scarce now. Now attempts are being made to replace natural sand with alternative materials. The needs of construction industry are increasing every day and demand for construction materials is increasing, which in turn is increasing the cost of materials and in turn the cost of the entire project. In the present study, an attempt has been made in choosing crushed granite fines as an alternative to natural sand and also to find the durability properties. Natural sand and granite are tested for their compressive strength tests carried out after 28 days of water curing and also the durability of concrete after 60 days soaking in HCl acid after specimens are subjected to 28 days water curing.

 
 

Natural sand, Construction, HCl, Granite fines, Durability test, Cost analysis.