Assessment of Stone Ash as a Fine Aggregate Material to Meet the Value of Normal Concrete Compressive Strength

Abstract

The concrete industry in Indonesia is very advanced and developing, so the use of construction materials is increasing. The need for other materials as a substitute for fine aggregate for the manufacture of concrete, namely stone ash comes from the stone slate industry waste. 20% stone ash, 80% sand) and (30% rock ash, 70% sand) with a concrete quality target of Fc' 17.5 Mpa. The method used is the laboratory experimental method referring to the SNI standard. The results showed that the use of stone ash (AB) as a normal concrete mixture affected the compressive strength of concrete. The higher the percentage of stone ash (AB), then the value of the compressive strength of concrete increases. The value of the compressive strength of concrete from stone ash (AB) at the composition of AB 10%, AB 20% and AB 30% was 173.50 kg/cm2, 235.11 kg/cm2 and 239.88 kg/cm2 while normal concrete was 18.59 MPa at 28 days.