Browsing by Author "Abdulwahab R., Ajamu S.O"

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    Effects Of Broken Glass As A Partial Replacement Of Granite In The Production Of Concrete
    (2015) Abdulwahab R., Ajamu S.O
    The importance of coarse aggregate in concrete cannot be overemphasized. Glass forms a major component of solid waste in many countries and can be recycled after usage. Although, small proportion used by consumers has been recycled and reuse while about 70-80% is disposed to the land-fill and this constitutes to environmental waste. This paper investigated the suitability of glass as partial or full replacement of conventional aggregate (crushed granite) in the production of concrete. The aggregate (fine) was spread uniformly on a hard, clean and non porous surface. Thereafter, cement was added until uniformity in mix was achieved. After which the coarse aggregates in the order (granite : glass) was added in varying proportion of 100:0, 80:20, 60:40, 40:60, 20:80. Water was applied gradually until uniformity in color and consistency was obtained. A total of 36 concrete cubes of size 150 x 150 x 150 mm were produced. The compressive strength of concrete with 100% granite at 28 days is 23.78N/mm2 and that with 20% is 12.67N/mm2. The density of concrete with 0% and 80% glass is 2730kg/m3 and 2034kg/m3 respectively. The slump value of concrete sample with 100% granite fell by 40mm and that with 80% glass fell by 20mm. It can be deduced that there is a reduction in the compressive strength of concrete as the percentage of glass increases. Concrete with 15-20% glass; having compressive strength of approximately 20N/mm2 can be recommended for structural works while 60-80% is useful where aesthetics is required.