Compressive Strength Characteristics of Concrete in Which Cement is Partially Replaced by Steel Slag

Abdulazeez Rotimi

Abstract


Cement has been identified in literature as the most important ingredient in concrete, which acts as a binding material. Furthermore, cement has been identified as the second-largest industrial source of CO2 on earth. Consequently, there has been a global quest for the partial or full replacement of cement with an environment-friendly material to protect the environment. However, an experimental investigation was performed in this study to evaluate the compressive and flexural strength of oncrete in which cement was partially replaced with Ground Granulated Blast Furnace Slag (GGBS). Concrete specimens containing 0%, 5%, 10%, 20%, 30%, & 40% replacement of cement by steel slag were prepared and used for the analysis performed in this study. Moreover, the tests were conducted at 7 and 28 days of curing age. The results obtained in this study show a decrease of 14% in compressive strength and 10.5% in flexural strength for 10% replacement vis-à-vis control specimens at 28 days. For 20% replacement, the decrease in compressive and flexural strength were 25.5% and 31%, respectively. Notwithstanding, it was established that the steel slag has the potential to partially replace the cement especially when it is crushed into smaller particles, passing through BS sieve #200. 


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References


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