Strength Studies on Slag Sand Concrete Blended with Glass Powder and Dolomite Powder

Abstract

Cement is a crucial component in concrete production, but its manufacturing process contributes significantly to atmospheric CO2 emissions. It's estimated that the production of one ton of cement leads to the release of about 0.8 tons of CO2. To mitigate this environmental impact, incorporating mineral admixtures into concrete has become a promising solution. Dolomite powder, derived from the powdered sedimentary rock mineral dolostone, is being explored as a partial replacement for cement in concrete. Additionally, substituting conventional sand with slag sand, produced by crushing slag generated in the copper refining process into a sandy form using running water, can enhance the eco-friendliness of concrete. Another innovative approach involves integrating milled waste glass into concrete as a partial replacement for cement, further contributing to the development of environmentally friendly infrastructure. This study aims to investigate the effects of combining dolomite powder and glass powder on the strength and workability of concrete. Glass powder is introduced at variouslevels, such as 0, 10, and 20% of the cement's weight, while dolomite dust is used as a partial cement replacement at levels of 0, 10, 20, and 30% by weight. The research assesses the fresh properties of the concrete through tests like the slump cone, compaction factor, and vee bee tests. Strength properties are evaluated by measuring compressive strength at 28 and 90 days, as well as tensile and flexural strength.