As a crucial component of modern transportation infrastructure,port engineering requires emergency repair and rapid construction during peacetime or wartime due to potential damage.Seawater sea-sand concrete(SSC),which made from seawater and sea-sand,demonstrates significant application value and development potential in emergency port engineering rehabilitation due to its local material availability,early strength development,and rapid setting characteristics.On the basis of the current research status on SSC both domestically and internationally,we summarize the mechanisms by which seawater and sea-sand influence concrete properties,and analyze the key properties of SSC to focus on in emergency repair and rapid construction for port engineering,including compressive strength,setting rate,and workability.The results show that,natural seawater and sea-sand can effectively shorten construction periods and reduce costs for port emergency repair and rapid construction,with SSC preparation requiring no desalination treatment.It is necessary to control the replacement rate of sea-sand within 50%,or to reduce the content of impurities such as shells and coral sand in sea-sand through pretreatment.Incorporating appropriate supplementary cementitious materials and nanomaterials can regulate the initial/final setting time of SSC and enhance its adaptability for emergency repair and rapid construction.Compared with SSC,fiber reinforced SSC and ultra-high performance SSC exhibit excellent superior mechanical properties and durability,presenting broad application prospects in the emergency repair and rapid construction for port engineering.