Testing of cementitious roofing tile specimens using marble waste slurry

This research deals with replacing proportions of cement and aggregate with Marble Waste Slurry (MWS) as a partial weight in cementitious roofing tiles production. The research is based on an experimental study of roofing tile specimens produced with ordinary Portland cement (OPC) replaced by 5%, 10%, 15%, 20% and 25% (MWS), and roofing tiles produced with sand replaced by 5%, 10%, 20%, 30% and 40% (MWS). The marble waste slurry was dried at a temperature of 200ºC for 6 h. Physical and mechanical tests were performed to evaluate the performance of the green roofing tile specimens among which were: particle size distribution, water absorption, transverse breaking strength, compressive strength, permeability, freezing and thawing, as well as efflorescence investigations. For all mechanical tests conducted, roofing tile specimens containing MWS as a partial replacement for cement and sand were within the ASTM standard limits (ASTM C1492/2003 (Reapproved 2016) till 20% replacement ratio. All tile specimens containing Portland cement resulted in efflorescence.