Artificial Aggregate Made from Expanded Polystyrene Beads Coated with Cement Kiln Dust—An Experimental Trial

The use of waste materials from industrial products to support green building and environmentally friendly construction needs more attention and becomes a common thought. The use of waste materials such as Cement Kiln Dust (CKD) or often referred to as Bypass Dust (BPD), as a concrete substitution material, has been done a lot and not a few have given positive results. However, it is necessary to have other alternatives regarding using this waste material, one of which is to try to use it as a coating material for lightweight materials such as Expanded Polystyrene (EPS) to manufacture artificial aggregate. This coating technique uses a solvent/adhesive in the form of liquid (acetone–water and polyvinyl acetate-water). The resulting weights of coated EPS with BPD are 154–175 g/l. Artificial lightweight aggregate made from EPS grains coated with CKD powder with an adhesive solution of a mixture of Polyvinyl Acetate (PVA)-water gave more promising results than an acetone–water binder. The process of creating coated EPS shows the potential as artificial aggregates for a lightweight concrete. The coated EPS gives a better result in strength than pure EPS beads when replacing the coarse aggregate.