related to a high volume of entrapped air voids entering the concrete
due to hydrophobicity of EPS beads. It should be noted that
these phenomena could not be quantified. To sum up, EPS beads
utilization increases the amount of porosity of concrete due to
hydrophobicity and microcracks generated during the absorption
test, and consequently increases the water absorption of concrete.
EPS concretes containing SF has lower porosity than EPS concretes
containing only Portland cement, while lower pozzolanic
reactivity of RHA resulted in the mixtures with higher porosity
and water absorption. Moreover, using PP fibers increase the porosity
and water absorption. As seen in Table 7, the more amount of
fiber used in production of EPS concerts, the more increase in water
absorption could be observed. This trend could be related to the
induced porosity of concrete resulted by fiber utilization.