ABSTRACT
The
properties were investigated using Ground Nut Shell Ash (GSA) as a partial
replacement for cement in concrete production. The ash contained Calcium Oxide
(CaO), Iron Oxide (Fe2O3), Manganese Oxide (MgO), Silica
Dioxide (SiO2), Alumina (Al2O3), Potash (K2O),
Soda (Na2O), Sulphur Trioxide (SO3), Carbon Trioxide (CO3)
and Bicarbonate ( HCO3). 10%, 20%, 30%, 40% 50% and 0% ash was used
in the mix to replace cement. The strength of cement/ash concrete increased
with curing period but the strength decreased with increasing ash percentage.
The cost of groundnut shell ash when compared with Ordinary Portland Cement is
very low due to the availability of Groundnut shell in large quantities as
agricultural farm wastes. The use of GSA may contribute not only to the
production of concrete of a higher quality and lower cost but also lead to
reduction of carbon dioxide emission from the production of cement. The partial
replacement of cement with GSA may also result in lower energy consumption
associated with the production of cement.
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