Durability Performance of Utilising Quarry Dust as Sustainable Material in Self-Compacting Concrete

摘要

Self-compacting concrete (SCC) a latest innovation in concrete technology is being regarded as one of the most promising developments in the construction industry due to numerous advantages over conventional vibrated concrete. SCC is an innovative construction material that can be placed into forms without mechanical vibration which able to flow and consolidate under its own weight. The utilisation of quarry dust (QD) as waste and eco-friendly material in SCC was investigated in this study. Conventional vibrated concrete mix was designated as OPC while SCC mixes with different percentages of QD which are 0%, 10%, 20%, 30%, 40% and 50% that had been used to replace sand as partial fine aggregate. The highrange superplasticizer had been used as the chemical admixtures that can enhance the rheological properties of all SCC mixes. The performance of conventional vibrated concrete and QD in SCC in terms of its workability was investigated while the durability performance was investigated by conducting water absorption test and water permeability test for curing periods of 7, 28 and 60 days were considered in this study. 50% of QD is the optimum dosage that can be used in order to achieve the lowest water absorption meanwhile 40% of QD is the optimum dosage that can be used in order to achieve the lowest water permeability for QD in SCC mix. In conclusion, the innovation material by utilising QD in SCC improve the workability and durability performance of concrete.