Keynote Speaker
Prof. Faiz Shaikh
School of Civil and Mechanical Engineering,Curtin University, Australia
Speech Title: Fresh, Mechanical, and Microstructural Properties of Concrete Containing Lithium Slag (Lithium Refinery Residue)
Abstract: In this study, fresh properties, mechanical, and microstructural properties of 0–60 % cement replaced lithium slag (LS) concretes were thoroughly determined with a total binder content of 400 kg/m3 and water-binder ratio of 0.435, and the properties were compared with the same mix proportion of FA concrete. The results show that 20–60 % LS concrete mixes produced normal density concrete within the design slump of 125 ± 25 mm and air content of 2 ± 0.5 %. At 90 days, the average compressive strength, tensile strength, and elastic modulus of 40 % LS concrete were 58.6 MPa, 4.10 MPa, and 39 GPa, respectively, which are higher compared to 40 % FA concrete of 35.5 MPa, 3.0 MPa, and 31.1 GPa, respectively, revealing that LS concrete offers better mechanical strength. However, mechanical strengths decreased significantly beyond 40 % LS incorporation. The experimentally determined 28 days mechanical strengths of 40 % LS concrete were underestimated by ACI 318 and AS 3600 standard equations. The BSE-EDS on the ITZ of fine and coarse aggregate confirmed a consistent development of amorphous and amorphous intermediate hydration products in the development of mechanical properties of LS concrete mixes.
Biography: Prof. Faiz Shaikh received his Ph.D. degree in civil engineering from the National University of Singapore (NUS) in 2005. Since 2009, he has been with Curtin University, Australia. He is a Chartered profession engineer (CPEng.) of Australia, fellow of Engineers Australia (FIEAust) and member of Concrete institute of Australia. Among much research interests the sustainable use of various industrial by-products in infrastructure application e.g. in low carbon concrete and fibre reinforced cementitious composites, pavement material, etc. is his one of the key research areas where he has contributed in terms of research publication, industry collaboration, training/mentoring of young engineers and success in research fund. He has successfully completed various research projects on the utilization of fly ash, blast furnace slag, ferro-nickel slag, lithium refinery residue and silica fume as partial replacement of cement in concrete; construction and demolition wastes, recycled glass aggregates, waste tyres crumb rubbers, copper heap leach residue as aggregates in concrete; and development of geopolymer concrete using fly ash or fly ash-slag blend or lithium refinery residue-fly ash. He has supervised 11 PhD and 3 MPhil students and currently supervising 6 PhD students.