Beneficiated pozzolans as cement replacement in bamboo‑reinforced concrete: the intrinsic characteristics

摘要

The use of concrete containing supplementary cementitious materials has gained popularity as an eco-efficient and sustainablernalternative to a number of concrete applications. In this study, beneficiated pozzolans, ground granulated blast furnace slagrn(GGBS) and metakaolin (MK), were used as partial replacement of ordinary Portland cement in bamboo-reinforced concrete.rnIn the mixtures, river sand and granite were used as fine and coarse aggregates, respectively. The compressive strength of concreterncubes, split-tensile strength of concrete cylinders, and flexural strength of reinforced concrete beams were determinedrnafter stipulated curing regimes. The morphology and mineralogy of bamboo and selected concrete mixtures were obtainedrnusing scanning electron microscope and X-ray diffraction, respectively. The concrete samples having blended cement werernfound to have better compressive and split-tensile strength than those made with conventional binder. Also, the mechanicalrncharacteristics of the samples improved up to 40% GGBS substitution. However, steel-reinforced concrete developed betterrnflexural strength than the bamboo-reinforced concrete (BRC). The study recommends pretreatment of bamboo to ensure itsrnadequate bonding with the cement paste, so as to achieve optimum performance of BRC.