According to the revised Andreasen-Andersen model,alkali activated mineral powder was used to completely replace cementitious materials to design the mix ratio of alkali activated ultra-high performance concrete.The impact of different water-binder ratios on the working performance and volume stability performance of ultra-high performance concrete(UHPC)was analyzed,and then the morphology of the alkali activated UPHC cross-section was analyzed using a scanning electron microscope.The results show that the unconfined compressive strength of alkali activated UHPC gradually increases with the decrease of water-binder ratio.The volume stability of alkali activated UHPC prepared by alkali activated mineral powder as cementing material is obviously improved.With the increase of curing age,the hydration products of alkali activated UHPC have more dense structure and excellent microstructure.
关键词
碱激发超高性能混凝土/碱激发矿粉/力学性能/微观形貌/体积稳定性
Key words
alkali activated UHPC/alkali activated mineral powder/mechanical property/microscopic morphology/volumetric stability
维普
万方数据