Characteristics of self-compacting concrete using quarry dust.

Oman has made serious efforts to convert industrial waste into usable building materials. Ordinary concrete has demonstrated a lack of strong mechanical characteristics during compacting, such as honeycombing and segregation. Earlier studies have produced inventive concrete from recycled waste elements with success. Research have also shown that self-compacted concrete is the best way to achieve durable concrete and overcome the aforementioned problems. One such item found in Oman's industrial waste is quarry dust. In this study, experimental research is done to see if waste powder made from quarrying could be used to make self-compacting concrete. The primary goals of this paper are to create SCC mixes with quarry dust that satisfy the standards for workability and compare the compressive strength of the created SCC to the control mix. Self-compacted concrete was designed in three different mixes, Mix-A, Mix-B, and Mix-C, and the outcomes were compared to the Control Mix. Since the control mix contains no quarry dust, it is proposed that it replace 10%, 20%, and 30% of the fine aggregates in the mix. According to EFNARC requirements, the suggested SCC mix designs were tested for viability, including flow ability through slump flow and slump flow at T500 and segregation resistance through V-funnel. Using 150x150x150 mm cubes, all mixtures underwent compressive strength testing in accordance with the BS standard testing procedure. In contrast to the control mix, which completely failed the slump flow test, the results demonstrate that all SCC mix designs have met the stipulated workability criteria of flow ability of 671mm, 679mm, and 702mm for Mix-A, Mix-B, and Mix-C, respectively. Through the V-funnel test, Mix-C has demonstrated the best segregation resistance. With an average compressive strength of 48.8 MPa, Mix-B has proven to be the most effective mix among the three recommended designs. It also has the highest compressive strength of any mix, including the control mix. While the Control Mix, Mix-A, and Mix-C have attained respective pressures of 48.1, 46.1, and 38.6 MPa. The study finds that employing quarry dust in place of fine aggregates can successfully produce SCC. [ABSTRACT FROM AUTHOR]