EFFECT OF GROUNDNUT SHELL ASHAND MARBLE DUST AS A PARTIAL REPLACEMENT FOR CEMENT IN CONCRETE PRODUCTION

• Published in: Annals of Faculty Engineering Hunedoara 2016-11, Vol.14 (4), p.63
• Main Authors: Adebara, S A, Afolayan, A, Anifowose, Mukaila A, Ogundare, D A, Olomo, R O
• Format: Article
• Language: English
• Subjects: Agriculture; Cement; Concrete construction; Waste materials
• ISSN: 1584-2665; 2601-2332

The need to reduce an amount of Groundnut Shell Ash and Marble Dust in an environment and possible utilization to reduce the cost of concrete production was investigated. A total number of 120 concrete cubes of size 150mm x 150mm x 150mm with different percentages replacement of Groundnut Shell Ash (GSA) and Marble Dust (MD) to Dangote Ordinary Portland Cement (OPC) at (0%, 5%, 10%, 15%, and 20%) with constant Water - Cement ratio of 0.55 were produced. Chemical Composition of Groundnut Shell Ash (GSA), Marble Dust (MD) and Dangote Ordinary Portland Cement (OPC) was examined and Slump test carried out to determine the effect of Groundnut Shell Ash (GSA) and Marble Dust (MD) on the workability of fresh concrete. A Compressive Strength at the ages of 7, 14, 21 and 28 days were determined.The results obtained from the various test carried out shows that,chemical composition of GSA has 25.4021% of (SiO2 + AbO3 + Fe2O3) which is less than 70% of compound oxides of pozzolansindicating that the sample is not in accordance with the requirements of ASTM C 618 (1991), and not a good pozzolan.The slump value decreases with percentage increase of Groundnut Shell Ash and Marble Dust. The compressive strength increases with curing age of concrete for 5%, 10% and 20%, but it decreases for 0% and 15% at 14days for mix ratio 1:2:4. Also, the compressive strength increases with age of curing at 0%, 10%, 15% and 20%, but it decreases for 5% at 14days for mix ratio 1:11/2:3. However, 10% replacement of Groundnut Shell Ash and Marble Dust with 17.34 N/mm2 strength value for mix ratio 1:2:4 and 20% replacement of Groundnut Shell Ash and Marble Dust with 18.37 N/mm2 strength value for mix ratio 1:11/2:3 should be adopted when replacing this admixture with cement. Since all the concrete cubes met the minimum strength of 6N/mm2 after 28days of curing recommended by BS 5224 (1976) for masonry cement, Groundnut Shell Ash - Marble Dust concrete can be used for concrete works where strength is of less importance such as floor screed, mass concrete and mortar.