Effects of Nanomaterials Reinforced Aggregate on Mechanical Properties and Microstructure of Recycled Brick Aggregate Concrete

In this paper, the effects of nano-SiO2 and nano-Al2O3 on brick aggregate properties, compressive strength concrete at different ages, microstructure are investigated. The results show that water absorption recycled decreases with increase nanomaterials solution concentrations, crush index decreases. Nano-SiO2 improve effect early more obvious. With nano-solution concentration, reinforced increases first then decreases, while increases. internal structure is denser, micro cracks pores filled hydration products, interfacial transition zone compact.