Influence of Municipal Solid Waste Ash as a Replacement of Cement on Fresh Properties and Compressive Strength of Self-Compacting Concrete
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Abstract
The research aims to study workability of self-compacting concrete (SCC) integrating with Hat Yai Municipal’s solid waste ash as a replacement of cement., segregate resistance and passing ability were tested by using slump flow, V-funnel and L-box methods, respectively. The compressive strength of the hardened concrete was presented. The municipal solid waste ash was used as a binder replacing the Portland cement type 1 at varying weight percentages of 0%, 5%, 10% and 15%, and the binder ratio at 0.40. The waterproof and superplasticizer were also used as concrete admixture. According to concrete admixture, two designs of experiment were done- admixture with superplasticizer and without superplasticizer. The results show that there is no significant difference (p>0.05) between workability patterns of the two types. The 10% replacement of cement gives the lowest slump. The higher percentage of waste ash as a replacement increase, the flow time of V-funnel increases. This higher viscosity, as a result, decreases the L-box ratio. Moreover, it was found that at curing age of 28 days, the replacement of cement with municipal waste ash mixed with 15 percent of concrete can result in a higher compressive strength which is roughly the same as the control mixture.
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