Abstract
In Malaysia, issues of granite aggregate depletion in future due to increasing use in concrete industry and the availability of laterite aggregate locally has initiated studies on concrete produced using laterite aggregate as partial coarse aggregate replacement. Although, replacement of laterite aggregate up to 30% able to produce concrete with the targeted strength but durability of this concrete towards acid attack yet to be investigated. Thus, this study presents and discusses the performance of concrete consisting various percentage of laterite aggregate integrated as partial coarse aggregate replacement upon exposure to acidic environment. Mixes consisting various content of laterite aggregate as partial coarse aggregate replacement ranging from 0, 10, 20, 30, 40 and 50%, respectively were prepared in form of cubes and then subjected to water curing for 28 days before immersed in hydrochloric acid solution for 1800 h. Performance of the specimens were observed through mass loss and strength reduction. Generally, durability performance of concrete produced using up to 20% of laterite aggregate is comparable to plain concrete.
Highlights
The escalating demand from Malaysian construction industry for concrete production has results in increase of granite aggregate supply from the local quarries which poses the risk for this material to deplete in future
The availability of laterite aggregate in this country (West and Dumbleton, 1970) which can be used for concrete work (Madu, 1980) has open the door of choice for integration of this material to be used as partial coarse aggregate replacement in concrete production
Discussion in this study focuses on behavior of concrete mixes with various content of laterite aggregate upon exposure to acidic environment in terms of mass loss and compressive strength loss of the specimens
Summary
The escalating demand from Malaysian construction industry for concrete production has results in increase of granite aggregate supply from the local quarries which poses the risk for this material to deplete in future. Studies conducted by Muthusamy and Kamaruzaman (2012) discovered laterite aggregate which possess physical characteristic almost similar to granite aggregate can be used to replace granite partially between 20 to 30% to produce workable concrete mix with the targeted strength. This experimental work which looks into the effect of substituting various percentage of granite aggregate with laterite aggregate towards acid resistance of concrete were conducted at laboratory of Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang.
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