The Mechanical Properties of Concrete Incorporating Steel Slag as Supplementary Cementitious Material

Abstract:

Steel slag (SS) is a kind of industrial solid waste usually been dumped at landfills and causes environmental pollution. Previous studies have demostrated that SS can be an alternative material to be used for making concrete and could achieve good mechanical properties, which not only reduce natural resources depletion but also improve environmental quality. This study aims to evaluate the effectiveness of SS as supplementary cementitious material (SCM) partially replacing cement on workability and mechanical properties of fresh and hardened concrete. X-ray flouresence test, slump test, compressive strength test and ultra pulse velocity test have been conducted. Mix designs are determined with replacement proportion of cement by SS of 0, 10%, 20%, 30%, 40% and 50%. Results show that replacement of cement by SS up to 50% increase the workability of concrete. The density of concrete ranges from 2083 to 2373 kg/m³, with and without replacement of SS at curing age of 1-day, 3-day and 28-day. Compressive strength of concretes incorporating SS is lower than that of plain concrete. 1-day and 3-day compressive strength of concrete incorporating SS decrease with the increase in replacement of SS while 28-day compressive strength reach peak at 30% replacement and further replacement of SS reduce 28-day compressive strength. The UPV value of concrete have good relationship with compressive strengh with the correlation coefficient of 0.92, 0.87 and 0.70 of 1-day, 3-day and 28-day experiment data, respectively. This study indicates the SS can be used for making concrete.

• Periodical: Key Engineering Materials (Volume 879)
• Pages: 81-90
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.879.81
• Online since: March 2021
• Authors: Xiao Feng Li, Shu Ing Doh*, Wei Ying Feng, Ja’far A. Aldiabat Albtoosh, Chong Beng Wei
• Keywords: Compressive Strength, Mechanical, Steel Slag, UPV

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