This study evaluates the performance of lightweight mortar incorporating recycled expanded polystyrene (EPS) as a partial replacement for natural river sand. Targeting non-structural applications plastering, rendering, and masonry bedding a 25% volumetric sand replacement was investigated. The water-to-cement ratio was maintained between 0.45 and 0.50 using an OPC:sand ratio of 1:3 by volume. Results show …

Incorporation of Waste EPS in Mortar for Lightweight and Energy-Efficient ConstructionRead More

This study investigates the feasibility of using Boat Fiber Waste Powder (BFWP) as a partial replacement for fine aggregates in M30-grade concrete. BFWP, derived from discarded glass-fiber-reinforced polymer (GFRP) boat components, was incorporated at 0%, 10%, 20%, 30%, and 40% replacement levels by mass of fine aggregate. Workability (slump test, ASTM C143), 7-day and 28-day …

Performance of Concrete Incorporating Boat Fiber Waste Powder as a Partial Replacement for Fine AggregatesRead More

Expansive clayey soils present persistent engineering challenges due to their high plasticity and pronounced swelling behavior upon moisture fluctuation. Conventional stabilization methods such as lime and cement treatment are effective but entail substantial economic and environmental costs. This study investigates the viability of coal-derived bottom ash (BA), sourced from the Norochcholai Coal Power Plant in …

Effect of Coal Bottom Ash on the Plasticity and Swelling Behavior of Expansive Clayey SoilRead More

The escalating global production of waste tires exceeding 1.5 billion units annually presents an acute environmental challenge that demands integration with sustainable construction strategies. This study investigates the mechanical and physical performance of concrete incorporating heat-treated crumb rubber (CR) as a partial fine aggregate replacement at six substitution levels: 20%, 30%, 40%, 50%, 60%, and …

Mechanical and Physical Properties of Heat-Treated Crumb Rubber Concrete at High Fine Aggregate Replacement Levels Implications for Sustainable Lightweight ConstructionRead More

Construction workers are routinely exposed to airborne particulate matter (PM) generated by activities such as cutting, drilling, demolition, and excavation. In Sri Lanka, where dust management practices on construction sites are often inadequate, this exposure poses a serious but underexamined occupational health risk. This study assessed PM exposure levels and associated health effects among construction …

Particulate Matter Exposure and Health Effects Among Construction Workers in Sri LankaRead More