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IJSTR >> Volume 9 - Issue 5, May 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Evaluation Of Using Cement In Alkali-Activated Slag Concrete

[Full Text]



Ismail Amer, M. Kohail, M.S. El-Feky, Ahmed Rashad, Mohamed A. Khalaf



Alkali Activated Concrete, GGBFS, OPC, Ambient Cured, Solution Modulus, Taguchi Method, Compressive Strength.



This paper presents an evaluation of utilizing cement (OPC) as a partially replacement from slag (GGBFS) in Alkali Activated Slag Concrete (AASC) mixes cured in ambient conditions. The evaluation of mixes was performed based on workability and compressive strength using Taguchi method. The aluminosilicate source was a mix of GGBFS and OPC, while the alkaline activator was made with a mix of Sodium Hydroxide (SH) and Sodium Silicate (SS). The four parameters considered in this study are: GGBFS:OPC ratio, Na2O ratio, solution modulus (Ms) and water to binder ratio (W/B). Nine mixes were conducted using L9 Taguchi array. Slump test and compression test were carried out on all mixes. The results were evaluated by determining Signal-to-Noise (S/N) ratio using Minitab program and making ANOVA analysis using Qualitek-4 program to investigate the optimum level for each parameter. It was found that using alkali activator with a combination of GGBFS and OPC is not effective method to produce AAC because of the very low workability obtained. On the other hand, using slag only as a binder was effective to produce AAC with high compressive strength and desirable workability.



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