Abstract: In the complex marine environments, the erosion and abrasion of concrete structures with coral reef sand such as breakwaters are frequently occurred. In order to improve the abrasion performance of coral reef sand concrete and the durability of breakwaters, basalt fibers with different content are mixed into the coral reef sand concrete samples. The basalt improved coral reef sand concrete samples were laboratory tested with uniaxial compressive strength, splitting tensile and abrasion resistance tests. The influence of the basalt fiber content on the mechanical properties of coral reef sand concrete were investigated. The results indicate that, the compressive strength of the basalt fiber improve coral reef sand concrete increases with the increase of curing age, but the content of basalt fiber has limited impact on the compressive strength. The split tensile strength of the sample can be improved by the basalt fiber content. When the basalt fiber content is 0.10% of the sample volume, the abrasion resistance reaches the maximum.

Key words: coral reef sand concrete, basalt fiber, mechanical properties, abrasion resistance