Analysis of Coarse Aggregate Sources Effects on Compressive Strength of Cement Concrete

Abstract

Substandard materials, specially, low-quality cement concrete as construction materials leading the failure of structure in Nepal before design life and some structure fails during the construction phase. Toanalysis Coarse Aggregate Sources Effects on Compressive Strength of Cement Concrete. Laboratory tests were conducted to find the properties of coarse aggregates from selected 4 river sources and compressive strength test was conducted using UTM machine for altogether 48 cubes.

After conducting the test for properties of specific gravity, loose bulk density, water absorption and aggregate abrasion properties value of coarse aggregate sources were found in the range of (2.56-2.79), (1568.38-1707.06) kg/m³, (1.76-1.94) %, (18.75-26.5) % respectively. The compressive strength value of all 48 samples were obtained greater than the minimum strength provided by M20 grade and ranges from 20.64 N/mm² to 32.47 N/mm². The value of mean compressive strength of sixteen combinations were obtained from test was differ from each other. Chisang coarse aggregates achieved more value of average compressive strength than other sources. Two-way ANOVA analysis shows that there is significance difference in mean compressive strength of concrete made from different coarse aggregates source. This study concluded that all coarse aggregates sources and concrete made from it can be used for residential building construction propose and other concrete work of M20 grade.