Research on Corrosion Characteristics and Performance Degradation of Basalt Fiber Concrete under Sodium Magnesium Sulfate Corrosion Environment

Abstract

Wang, Z.-S.; Li, Y.-K.; Lu, J.-L.; Tian, J.-B., and Zhao, K., 2020. Research on corrosion characteristics and performance degradation of basalt fiber concrete under sodium magnesium sulfate corrosion environment. In: Liu, X. and Zhao, L. (eds.), Today's Modern Coastal Society: Technical and Sociological Aspects of Coastal Research. Journal of Coastal Research, Special Issue No. 111, pp. 56–62. Coconut Creek (Florida), ISSN 0749-0208.As the most commonly used building material for marine structures, concrete is seriously corroded by marine environment. As a green, high-performance material, basalt fiber can improve the mechanical and corrosion resistance of concrete materials. The research conducted experimental research and analysis on the durability and mechanical properties of basalt fiber concrete under the erosion of magnesium sulfate and sodium sulfate. The test block is 100 mm × 100 mm × 100 mm, and the fiber content is 0%, 0.05%, 0.1%, 0.2%, 0.3%, respectively, soaked in the magnesium sulfate and sodium sulfate solution with a concentration of 5.0%. The apparent cracks and water absorption were observed every 30 days. The mechanical properties and the ion concentration were measured every 90 days. The main conclusions are as follows: basalt fiber has a certain increase in the bearing capacity and deformability of concrete. Compared with ordinary concrete in a sulfate environment, basalt fiber concrete has a slower increase in porosity; however, excessive fiber will adversely affect durability. When the basalt parameter is about 0.1%, it is the most economical and reasonable, this study will provide a certain research basis for the application of basalt fiber concrete in marine structures.