This paper presented a durability experimental study for thin basalt fiber reinforced polymer (BFRP) mesh reinforced cementitious plates under indoor and marine environment. The marine environment was simulated by wetting/drying cycles (wetting in salt water and drying in hot air). After 12 months of exposure, the effects of the chloride on the tensile and bending behaviors of the thin plate were investigated. In addition to the penetration of salt water, the chloride in the thin plate could be also from the sea sand since it is a component of the plate. Experimental results showed that the effect of the indoor exposure on the tensile capacity of the plate is not pronounced, while the marine exposure reduced the tensile capacity significantly. The bending capacity of the thin plates was remarkably reduced by both indoor and marine environmental exposure, in which the effect of the marine environment is more severe. The tensile capacity of the meshes extracted from the thin plates was tested, as well as the meshes immersed in salt solution for 30, 60, and 90 days. The test results confirmed that the chloride is the reason of the BFRP mesh deterioration. Moreover, as a comparison, the steel mesh reinforced thin plate was also tested and it has a similar durability performance.
The resource utilization and direct application of sea sand in construction engineering is a hot topic of interest. In order to avoid the problem of steel corrosion in the sea sand concrete, basalt fiber reinforced plastic (BFRP) mesh instead of steel mesh to reinforce sea sand mortar thin plate was considered. This novel thin plate resulted in a structural performance clearly superior to that of a steel mesh thin plate. In this paper, the durability performance was investigated for both natural indoor environments and wet-dry environments. The experimental results showed that the tensile strength of the BFRP mesh thin plate varied slightly, the bending strength decreased significantly, and the ductility improved after 1 year indoor environmental exposure, which is marginally better than that of the steel mesh thin plate. Subjected to wet-dry environments in a salt solution for 1 year, however, the tensile strength, flexural strength and ductility of the BFRP mesh thin plate were all significantly decreased. The performance of the steel mesh thin plate in this condition was clearly better. KEYWORDSBFRP mesh, steel mesh, sea sand mortar thin plate, indoor environments, wet-dry environments.
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