The Use of The Semanding Tuban Limestone as A Partial Replacement of Coarse Aggregate in Concrete Mixes

Concrete is the most widely used material in the world. Expensive construction can be caused by the increasing cost of concrete. In recent years, concrete production has increased which means consumption of coarse aggregate also increased. Natural coarse aggregate is gravel. Due to the growth in the construction industry, the demand for gravel is increasing rapidly, therefore gravel is expensive. In Semanding Tuban, there is limestone which is greater available than gravel in order to reduce concrete cost. In this case there is a need to study the concrete with limestone from Semanding Tuban as coarse aggregate in order to get better understanding of limestone in concrete mixes. The aim of this research is to investigate the compressive strength of the concrete, in which limestone from Semanding Tuban was used as coarse aggregate is partially or completely replaced. The coarse aggregate was replaced with 0%, 25%, 50%, 75%, 100% by limestone from Semanding Tuban, respectively. The compressive strengths of concrete specimens for respective mix proportions were tested at 14 and 28 days of water curing. In addition the source of aggregate properties was considered in this research: Los Angeles abrasion, absorption and specific gravity for coarse aggregates and fine aggregate. The result of the compressive strength concrete of limestone from Semanding Tuban as addition showed that increased by 0% to 50%, but it decreased to 50% to 100%.