The effect of mineral admixture on the properties of the binder towards using in making pervious concrete

Abstract

Pervious concrete has not been much studied and applied in Vietnam, the outstanding feature of this concrete is the open pore system for water flowing through. The two most important indicators for evaluating the quality of pervious concretes are the permeability coefficient and compressive strength but these are two opposite functions. Research into the properties of this type of concrete, such as workability, strength, etc … is one of the most effective measures that will improve the quality of the binders. The purpose of this article is to improve the characteristic of binder by separately using silicafume (SF) and fly ash (FA) with a content of 10%; 20% and 30% and by using the combination compound of 10% SF with 10-30% FA. The two typical properties of binders are: the viscosity of the binders through the flowing time of Marsh cone, the instantaneous viscosity determined by the SV-10 viscosimeter and the cstrength of the binders.