PENGARUH SUPERPLASTICIZER TERHADAP KUAT TEKAN DAN POROSITAS PADA BETON NON PASIR
Abstract
No fines concrete is a form of lightweight porous concrete, obtained by eliminating the sand from the normal concentrate mix. This research analyses the compressive strength and porosity of no fines concrete. The advantage offered by no fine concrete is its excellent drainage properties. It enables water to immediately percolate away from the surface of the slab. In this research, the researcher uses coarse aggregate from Clereng with sizes 1 cm to 2cm. The ratio of aggregate to cement is 5: 1 with FAS: 0.35 and superplasticizer dose of 0%, 0.5%, 1% and 1.5%. Superplasticizer used in the form of materials added type f Sika Viscocrete 1003 which serves to increase workability by reducing water. Cylinder with the diameter 15 cm and height 30cm is tested to know the compressive strength at 7, 14 and 28 days of water curing and the porosity at 28 days.The highest compressive strength is 6.45 Mpa at 28 days with the addition of 0% superplasticizer, the lowest is 1.02 Mpa at 28 days with the addition 1.5% superplasticizer. The highest porosity test is 24.33% with the addition of 1.5% superplasticizer and the lowest is 16.73% with addition of 0% superplasticizer. Based on the results of compressive strength test, the concrete could be applied to pedestrian paths, parks and terraces of the house.