EXPERIMENTAL STUDY ON PERVIOUS CEMENT AND PERVIOUS GEOPOLYMER CONCRETES USING SEA SAND AND SEAWATER
Keywords:Geopolymer concrete, Porous concrete, Fly ash, Sea sand, Sea water
Normal pervious concrete is a special type of concrete with high porosity, allowing water to percolate into the subgrade and using Portland cement. Pervious geopolymer concrete is also an environmentally friendly concrete using fly ash, blast furnace slag and kaolinite alkaline activator. However, all previous cement and geopolymer concretes are produced with normal sand and clean water. This study presents an experimental program on two types of concrete, viz. pervious cement concrete (PCC) and pervious geopolymer concrete (PGC), both made of sea sand and seawater. The compressive strength and hydraulic properties of those concretes have been investigated, showing that they have acceptable properties and a great potential to replace normal pervious concrete near coastal areas with low traffic density, viz., pavements, parking lots. It is possible to produce PCC and PGC made by sea sand and sea water achieving the compressive strength of cylinder samples greater than 17 MPa at a porosity of 24%.