INFLUENCE OF POROSITY ON WATER AND CHLORIDE ION TRANSPORT THROUGH CONCRETE

摘要

This paper presents the results of a research work carried out to study the influence of concrete pore dimensions and total pore volume on water and chloride ion transport through it. The study was performed on samples of concrete having two levels of total porosity, and each level of porosity having two different pore dimensions. The different levels of total porosity were obtained using two different water-cement ratios while the different pore dimensions were obtained by using two different cements: ordinary Portland cement and the same type with blast furnace slag addition. It was concluded that the pore dimension and total pore volume affect the water vapour, liquid water and chloride ion transport in different ways. The slag cement concrete with finer pores and with greater total porosity than Portland cement concrete absorbed more water vapour and less water in liquid form. The pore dimension was more important on chloride ion transport than the total volume of pores.