摘要：The performance of a sustainable green concrete with fly ash (FA), rice husk ash (RHA),and stone dust (SD) as a partial replacement of cement and sand was experimentally explored. FA andRHA have a high silica content, are highly pozzolanic in nature and have a high surface area withoutany treatment. These by-products show filler effects, which enhance concrete’s density. Results showedthat the FA and RHA materials have good hydration behaviour and effectively develop strength at anearly age of concrete. SD acts as a stress transferring medium within concrete, thereby allowing theconcrete to be stronger in compression, and bending. Consequently, water absorption capacity of thesustainable concrete was lower than that of the ordinary one. However, a little reduction in strengthwas observed after the replacement of the binder and aggregate using the FA, RHA and SD, but thereduction was insignificant. The reinforced structure with sustainable concrete containing the FA, RHA,and SD generally fails in concrete crushing tests initiated by flexural cracking followed by shear cracks.The sustainable concrete could be categorized as a perfect material with no significant conciliationin strength properties and can be applied to design under-reinforced elements for a low-to-moderateservice load.
关键词：Fly ash;rice husk ash;stone dust;sustainable green concrete;mechanical properties
