Author(s) :

Ogork, E.N., Araga, A.O.

Volume/Issue :

Abstract :

This paper assesses the potentials of Cassava Peel Powder (CPP) as an admixture in concrete by determining the effects of addition of CPP of 0, 0.2, 0.4, 0.6, 0.8 and 1.0 %, respectively by weight of cement and also on cement paste. CPP used was obtained from cassava peel collected from Ogaminana village, Adavi Local Government Area, Kogi State, Nigeria. The peel was cleaned, sun dried and ground into powder in a milling machine. The powder was passed through a sieve 425μm and chemical composition of CPP was conducted by use of a Perkin – Elmer atomic absorption spectrophotometer. Setting times of cement paste admixed with various doses of CPP was conducted in accordance with BS EN 196-3 (1995). Concrete mixes of 1: 2: 4 with a water-cement ratio of 0.52 were prepared and the properties of fresh and hardened concrete assessed. The compressive strength of cubes of samples of CPP concrete cured in water were determined at 3, 7, 28 and 56 days, respectively in accordance to BS 1881, part 116, 1983. The results showed that Cassava peel powder is dominated with oxides of Nitrogen, phosphorous, silicon, sulphur, potassium and complex compounds of starch and cynogenic acid. CPP increases the initial and final setting times of cement paste and could therefore be used as a set retarding admixture. The addition of CPP in concrete improves the workability and compressive strength of concrete and could be used as a water reducing admixture. 0.6 % by weight of cement is the optimum dosage of CPP for enhanced workability and strength of concrete.

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