EXPERIMENTAL INVESTIGATION ON LWC WITH COMPLETE REPLACEMENT OF COURSE AGGREGATE BY EPS BEADS

In this paper, expanded polystyrene (EPS) lightweight concrete (LWC) was investigated. The mainaim was to design EPS LWC with the specified density of 1200 kg/m3 according to standard concretemix proportion. Mix proportion included total replacement of the conventional coarse aggregate bymaximum possible amount of EPS beads, which ensures concrete workability and prescribeddensity. The results demonstrated that exactly defined mixture-proportioning and casting procedureare required to achieve designed density. For designed EPS LWC mixture properties of freshlymixedconcrete and hardened concrete were analyzed. Based on test results it is concluded thatdesigned EPS LWC can be used for structural-insulating purpose such as floors and roofs.

Mixture Proportioning Design of Pervious Concrete Using the Paste Content Ratio Method (Aggregate Gradation 19mm~9.5mm and 9.5mm~4.75mm)

In this work, we used the concept of paste content ratios in the mixture proportioning design of pervious concrete so that the concrete paste content could be adjusted to satisfy the requirements of different engineering applications. We experimentally demonstrated that compressive strength is negatively correlated with the coefficient of permeability and positively correlated with the paste content ratio. The highest compressive strength achieved in this study was 340 kgf/cm2, whereas the highest permeability coefficient was 0.116 cm/s. Design graphs for flowability, compressive strength, and permeability coefficient of the concrete mixtures were also constructed to be used by engineering companies as reference data.