Abstract
An experimental investigation was carried out to study the durability properties of Coconut Shell (CS) aggregate concrete. Effect of mineral admixtures such as fly ash and ground granulated blast furnace slag (GGBFS) as partial replacement of cement on durability properties of CS aggregate concrete was also verified. Specimens were cast and tested for durability characteristics such as water absorption, volume of pore voids, sorptivity, bulk diffusion, rapid chloride penetration, abrasion resistance and chemical attack tests. Four concrete mixes were considered for the study. Control mix, mix with18.5% coarse aggregate replaced by CS by weight, mix with 18.5% CS and 30% cement replaced by fly ash, and mix with 18.5% CS and 15% cement replaced by GGBFS. Test results showed that durability properties of all the mixes were comparable to normal concrete and some durability properties were enhanced by the addition of mineral admixtures.
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