Relationship between Cylinder Tensile Split and Flexural Strengths with Compressive Strength of Glass Concrete Made Using Bagasse Ash Cement

This research presents strength comparisons of cylinder tensile split strength and flexural strength with compressive strength of concrete made using sugar cane bagasse ash as part of cement and crushed glass as part of fine aggregates. In the research exercise, sugar cane bagasse ash (SCBA) was used to partially replace cement at 0 %, 5 %, 10 %, 15 % and 20 % and crushed glass used to partially replace river sand at 30 % by mass. The slump was maintained at 10-25mm for vibrated concrete and design mix ratio of 124 at water cement varying proportion of 0.50-0.65 was also used. The mathematical relationship between the compressive strength (Fcu28) at 28 days and the corresponding cylinder tensile split strength (Ft28) at 28 days obeyed the relationship represented in the polynomial equation with R2 value of 0.93. The values of tensile strength of concrete are usually 10-15 % of compressive strength but not more than 20 %. From the equation, the estimated values were within the range of 10-15 %. The mathematical relationship between the 28 days flexural (Ff28) and the compressive strengths (Fcu28) of glass concrete made using sugar cane bagasse ash cement obeyed the relationship represented in the polynomial equation with R2 value of 0.89. The usual relationship between compressive strength and flexural strength of concrete is that the compressive strength is approximately 8-10 times the flexural strength, hence the estimated values of equation were within the required range.