25-04-2016, 11:16 AM
ABSTRACT
The study investigates the characteristics strength performance and durability of Groundnut Shell Ash (GSA) blended cement concrete exposed to sulphate environments. The principal characteristic measured was the compressive strength of Ordinary Portland Cement (OPC) concrete and OPC/GSA concrete at varying substitution levels of 0%, 5%, 10% and 15% after curing in water and three chemical solutions (MgSO4 , NaSO4 and Ca2 SO4 ) of varying concentrations of 0.5%, 1.5% and 2.5% each at 56 day hydration period. The results showed that the OPC/GSA concrete performed best in these chemical solutions, especially at 10% GSA replacement which exhibited a convincing increase in compressive strengths above that obtain with the use of Ordinary Portland cement. The study concluded that OPC/GSA concrete having showed resistant to calcium sulphate, magnesium sulphate and Sodium Sulphate media would perform better in environments or soils containing these sulphates. (MgSO4 , NaSO4 and Ca2 SO4 ).
The study investigates the characteristics strength performance and durability of Groundnut Shell Ash (GSA) blended cement concrete exposed to sulphate environments. The principal characteristic measured was the compressive strength of Ordinary Portland Cement (OPC) concrete and OPC/GSA concrete at varying substitution levels of 0%, 5%, 10% and 15% after curing in water and three chemical solutions (MgSO4 , NaSO4 and Ca2 SO4 ) of varying concentrations of 0.5%, 1.5% and 2.5% each at 56 day hydration period. The results showed that the OPC/GSA concrete performed best in these chemical solutions, especially at 10% GSA replacement which exhibited a convincing increase in compressive strengths above that obtain with the use of Ordinary Portland cement. The study concluded that OPC/GSA concrete having showed resistant to calcium sulphate, magnesium sulphate and Sodium Sulphate media would perform better in environments or soils containing these sulphates. (MgSO4 , NaSO4 and Ca2 SO4 ).
