Improving Mechanical Behavior of Compacted Cement Sand Mixed with Glass Powder from Glass Industry and Glass Fiber for Green Construction Materials

The purpose of this research is to examine the mechanical behavior of compacted cement sand with the addition of glass fibers, glass powder from the glass industry, and Ordinary Portland Cement (OPC). Finding the optimal proportions of OPC, glass powder, and glass fibers in the soil–cement mixture to create a novel green building material is the aim of this study. Every sample of compacted cement sand was created with a glass fiber content of 0.5, 1.0, 1.5, 2.0, and 2.5% by volume, and a variation in glass fiber lengths of 3, 6, and 12 mm. The optimal moisture content for the samples was 6.19%. OPC content was applied at weights of 2, 4, 6, 8, and 10%. At 10, 20, 30, 40, and 50% of the cement, glass powder was added. After that, the samples of compacted cement were left for 7, 14, and 28 days in order to examine how the green building materials aged. The unconfined compression test was conducted on these samples of compacted cement sand in accordance with ASTM D1633-17. Based on the testing findings, it was determined that 8% cement is the right amount to combine with clayey soil, 1.0% glass fibers with a length of 6–12 mm, and 20% glass powder with a curing period up to 28 days are the right amounts. As a result, it has been demonstrated that glass fiber and powder are green building materials. By lowering the required amount of cement, our findings help Thailand’s future cement demand.