 the development of island construction concrete made from seawater coral aggregate concrete, SCAC, can be used as a basis for the development and utilization of island resources. By complying with the principle of using local materials, SCAC can be configured to meet the requirements of island and reef engineering construction, reducing the time and cost of construction. Quasi-static and dynamic mechanical tests were conducted on SCAC with varying limestone powder contents, revealing that the addition of limestone powder improved both the static and dynamic mechanical properties of SCAC. Furthermore, the dynamic tensile strength of SCAC increased with increasing limestone powder content, while the maximum strain value of SCAC increased with increasing strain rate grade. This article was authored by Wanchi, Lily Jiang, Mingzhu, and others.