Research progress in mechanisms and properties of nano-modified interface transition zone of Marine concrete

In the Marine environment, the invasion of various harmful ions (e.g., Na+, and Cl−) into the concrete can lose and deteriorate the interfacial transition zone (ITZ) which is the weakest area in concrete. The degradation of ITZ results in a decline in the mechanical performance and durability of concrete, making it crucial to study how to improve the stability of the interface transition zone. In this paper, a systematic review of the modification mechanisms of five different types of zero-dimensional nanoparticles in the ITZ was investigated, focusing on mechanical properties and durability. The evolution and deterioration of the ITZ in concrete in the Marine environment were studied, and also the modification mechanism of nanomaterials on this deterioration. The results indicate that the addition of nanoparticles to enhance the microstructure of ITZ can effectively improve the performance of the interface transition zone. This is primarily achieved through mechanisms such as filling effect, nucleation effect, and hydration promotion. These findings lay the foundation for future exploration of cement-based materials in marine environments.