The effect of Neem Seed husk on the physico-chemical properties of Neem seed husk ash concrete was investigated. Neem Seed husk is a by-product obtained during industrial processing of Neem Seed to extract oil and produce fertilizer. Neem seed husk ash was used in replacing cement in the proportions of 0%, 5%, 10%, 15%, 20% and 25% by weight of cement. The phyisico-chemical properties of cement at anhydrous state and the hydrated state (chemical composition, specific gravity, fineness, consistency of the cement paste and setting times) were studied. The experimental results obtained showed that Neem seed husk ash is a principal parameter which has influences on the physico-chemical properties of the Neem seed husk ash concrete.
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