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THE STANDARD DEVIATION IN CUBE STRENGTH RESULTS OF SELF-COMPACTING CONCRETE OF M40 GRADE USING QUARRY DUST AS FINE AGGREGATE AND FLY ASH POWDER AS FILLER

Journal: International Journal of Civil Engineering and Technology (IJCIET) (Vol.8, No. 10)

Publication Date:

Authors : ; ;

Page : 1695-1703

Keywords : Fly Ash; Cube Strength;

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Abstract

The reduction in the sources of natural sand and the requirement for reduction in cost of construction has led to an urgent need to identify a substitute for river sand. Quarry dust, which is a by product from the granite crushing processes in quarrying activity, is available abundantly and economically. This paper presents the study on the effect of replacing sand by quarry dust by 100% on the strength properties of self compacting concrete for M40 grade and also to find standard deviation in cube strength results. About 35 % of quarry dust powder having size between 600 micron to 300 micron. The results indicated that the standard deviation and coefficient of variation of cube test results for Mix 1, 2, 3 and 4 showed a variation between 3 MPa and 7.5 MPa and between 5% and 13% respectively. Lower cement content showed less standard deviation in compressive strength as compared to higher cement content. An average strength of 55.4 MPa of 31 cubes of Mix 2 has shown a standard deviation of 7.41 MPa and coefficient of variation of 13.4%.

Last modified: 2018-04-20 22:38:51