Enhancing the Durability and Strength of M30 Grade Concrete Through Quartzite Coarse Aggregate and Marble Dust Fine Aggregate Substitution

Abstract

In the ever-evolving field of construction, natural aggregates are extensively used, while the production of solid waste from construction demolitions is on the rise. This study aims to investigate concrete properties by substituting natural coarse aggregates with Quartzite and partially replacing fine aggregates with marble dust. This approach not only reduces environmental pollution associated with waste but also lessens the demand for natural aggregates. The study focuses on enhancing flexural strength, compressive strength, and split tensile strength. Marble dust, a byproduct of marble processing industries, is generated during sawing, grinding, and polishing processes. Experimental tests were conducted on plain M30 grade cement concrete, varying the percentages of Quartzite as a coarse aggregate replacement and marble dust as a fine aggregate replacement, with curing periods of 7, 14, and 28 days. The research adhered to the guidelines set by the Bureau of Indian Standards, utilizing a design mix of M30 concrete calculated by the IS method for casting specimens, including cubes. The effects of these substitutions on concrete properties were assessed, and it was found that the optimal replacement percentages were 20% for Quartzite as coarse aggregate and 15% for marble dust as fine aggregate, resulting in a significant increase in compressive strength. Experimental tests were conducted to determine fresh and hardened concrete properties, including compressive strength, split tensile strength, flexural strength, and workability at 7, 14, and 28 days of curing, with comparisons made to conventional concrete and Quartzite-marble based concrete.