UCU Scholar :: Browsing by Author " Rodney Ssebuliba"

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Investigating the Suitability of Using Pumice Powder as a Partial Replacement of Cement in Concrete to Inhibit Alkali-Silica Reactions
(Uganda Christian University, 2024-04-08) Rodney Ssebuliba
The research was carried out to mainly investigate the suitability of using pumice powder as s a partial replacement of cement in concrete to inhibit alkali silica reactions, that greatly affect the durability of concrete. It was achieved through firstly exploring the properties of pumice powder following a methodology of firstly carrying out both chemical and physical tests on the pumice powder and the cement. Properties of fresh concrete were then determined through carrying out the slump test for concrete, for the different mixes with the varying percentages of pumice powder partial replacement. Tests on hardened concrete were also later carried out, looking at the average percentage length changes in the concrete bars through the accelerated mortar bar test, in order to test for alkali silica reactions. Others tests including compressive strength and water absorption were also done, to determine the effect of partially replacing cement with pumice powder on these vital properties of concrete. From all the tests carried out, results were obtained which informed the conclusions and recommendations as clearly shown in the subsequent chapters of this report.