Effect of marble waste powder as partial replacement for cement on mortar properties
摘要
Stone industry generates significant amounts of waste during all processing operations, creating environmental and waste management challenges. Due to recyclability of the stone, research has been done to use this waste. This paper investigates the potential use of marble powder (MP) from Bosnia and Herzegovina as partial replacement for cement in mortar mixtures. Five mixtures were prepared with 0%, 5%, 10%, 15%, and 20% replacement of cement by MP. Fresh mortar properties including workability, air content and bulk density, as well as hardened mortar properties such as absorption, bulk density, compressive and flexural strength, quality (homogeneity), drying shrinkage and carbonation were evaluated. The results showed that MP addition slightly improved workability, while the air content decreased, indicating a denser mortar structure. The mixture with 10% MP achieved the highest 28-day compressive strength, while flexural strength remained comparable to the reference mixture for replacement levels up to 15%. Drying shrinkage was significantly reduced with increased MP content, reaching a reduction of approximately 46% for the mixture with 20% MP. Water absorption and carbonation depth slightly increased at higher replacement levels. Based on the overall performance, the optimal replacement level was determined to be 10%. Beyond that level of replacement, evaluated properties generally decline.