Effects of recycled concrete aggregate on some mechanical properties of high strength concrete

摘要

Aggregate is one of the essential ingredients for creating concrete, as it generally comprises 75% of the total for any concrete mixture. The strength of the concrete product is thus generally determined by the characteristics of aggregates used, which explains the need for a choice of alternative coarse aggregates. The goal for this study is to determine the strength properties of recycled aggregates for use in high strength concrete, to better understand the properties of concrete with recycled aggregates used as a substitution material for normal aggregates in concrete. The study thus compared the properties of high strength concrete with several percentage (22,40, 60,80, and 100%) of recycled aggregates. The investigation was done utilising a workability test that examined compressive, splitting tensile, and flexural strength. There is a possibility of utilising low cost recycled aggregates as an alternative material to normal aggregates in high strength concrete, as for these strength properties, the outcomes appear to suggest only a gradual reduction in compressive and splitting tensile strength as the level of recycled aggregates utilised in the specimens approaches the 100%replacement level.