Stabilizing problematic soils with new materials can reduce environmental problems and improve mechanical properties. This research uses the results of various tests, such as unconfined compressive strength (UCS), indirect tensile strength (ITS), ultrasonic pulse velocity (UPV), direct shear test, and standard Proctor compaction, to evaluate the effect of curing time and the nano aluminum oxide contents on the mechanical and shear characteristics of clay soil stabilized with cement and nano aluminum oxide. This research showed that the optimal content of replacing cement with nano aluminum oxide to stabilize clay soil is 0.9% by weight of cement. Adding the optimal content of nano aluminum oxide to cement-stabilized clay soil increased UCS and ITS by 28% and 51%, respectively. Also, the drained internal friction angle and cohesion increased by 17 and 25%, respectively. The results of UPV non-destructive testing can also be used to predict the mechanical characteristics of stabilized clay. By reducing cement consumption and enhancing soil stabilization, this research contributes to Sustainable Development Goals (SDGs) by promoting resource efficiency, lowering environmental impact, and supporting durable infrastructure development.

来源平台：INTERNATIONAL JOURNAL OF PAVEMENT RESEARCH AND TECHNOLOGY