The utilization of sandblasting sand waste for mortar and normal concrete

Abstract

Nowadays, large amounts of sandblasting sand waste are being produced and pollute environment. Sandblasting utilize to remove accumulated organic matter and other debris on concrete, steel, and wood components. The objective of experimental Laboratory for an analyse utilization of sandblasting waste in term of mortar strength, concrete strength, absorption and work ability of the mix. An experiment was conducted at civil laboratory POLINEMA using mortar cube 10 × 10 cm, and cylindrical concrete mould ø 15 × 30 cm, the curing time 3 and 7 day for mortar, 7 and 28 days for concrete. The testing refere to ASTM C-150 for mortar and Normal concrete with SNI-03-2834-2000. Fraction of waste sand are 0%,10%,20% and 30% of natural sand. The result, mortar compressive strength 3 days, 120 kg/cm2(0%), 125kg/cm2(10%), 129kg/cm2 (20%), and 131kg/cm2 (30%). For 7 Days, 190 kg/cm2(0%),200 kg/cm2(10%), 203 kg/cm2 (20%), and 213kg/cm2 (30%). For concrete strength 7 days, 150 kg/cm2 (0%), 161 kg/cm2 (10%), 168kg/cm2 (20%),174 kg/cm2 (30%), For 28 days, average concrete strength 225 kg/cm2 (0%),259 kg/cm2 (10%), 269 kg/cm2 (20%),272kg/cm2 (30%). An absorption decrease 8%(0%), 5%(10%), 4.5%(20%), and 3.9%(30%), work ability of the mix increase 3.5cm (0%), 3.57 cm (10%), 4.5cm (20%), and 4.9 cm (30%), that is indicated by slump value.