Water Permeability of Concrete Containing Different Pozzolanic Materials as a Partial Cement Replacement

This research conducts an experimental investigation to determine the water permeability of concrete mixtures containing different pozzolanic materials, namely silica fume, ground granulated blast-furnace slag (GGBS) and glass powder as a partial cement replacement. The water permeability of concrete was determined following the specifications in DIN 1048, BS EN 12390-8 or EN 19295. The research variables include partial cement replacement with varying percentages of 5, 10, 15 and 20% of different pozzolanic materials. The water–cement ratio in this experiment is 0.53, and the water permeability tests were conducted at 28 days. The typical concrete permeability values of less than eight based on EN 12390, Part B, are considered low permeability, values higher than 20 indicate high permeability, and values between 8 and 20 are moderate permeability. Specimens with small permeability values are less likely to experience water penetration that causes defects, while those with high permeability values are likely to exhibit defects due to water penetration. Information on the water permeability of the concrete containing silica fume, GGBS and glass powder added with admixture is pivotal when incorporating waste materials in concrete work, particularly concerning the concrete’s durability.