Experimental study some properties of pervious concrete using saline materials

Abstract

Pervious concrete has a system of open pores, they help water easily seep through when it rains, this is a type of concrete widely used in urban areas to reduce local flooding. With their hollow characteristics, they can also be applied to coastal and island structures such as contours, wave-reducing structures. However, in those same areas, it is often very difficult in terms of manufacturing materials such as sand and water. In this paper, we would like to introduce hollow concrete made from crushed stone with particle size (5 - 10) mm, a binder mixture consisting of 60 % cement + 10% silica fume (SF) + 30 % Ground Blast Furnace Slag (GBFS), sea sand, Hai Phong sea water combined with superplasticizers, with 3 design porosity of 15 %; 20 % and 25 %, using sea sand with concentrations of 4 %; 7 % and 10 %. The results have evaluated the influence of porosity, sand content on some properties of hollow concrete such as porosity, volumetric weight, strength, drainage coefficient.