This paper explores the durability and mechanical properties of concrete reinforced by basalt fiber, a natural inorganic nonmetallic material with a good prospect of engineering application, under magnesium sulfate corrosion. The concrete blocks with the side length of 100mm were added 0%, 0.05%, 0.1%, 0.2%, 0.3% basalt fiber, immersed in magnesium sulfate solution with a concentration of 5.0%, and observed continuously for 270 days. After that, the test blocks were subjected to the analysis on the variation of water absorption rate, and compared with ordinary concrete through compressive strength test and ion concentration measurement. The research results show that basalt fiber partially improved the compressive strength and deformation capacity of the concrete; in the magnesium sulfate solution, the pores in basalt fiber-reinforced concrete developed slower than those in ordinary concrete; however, excessive dosage of the fiber has a negative impact on concrete durability; the most economic and rational dosage of basalt fiber is around 0.1%. In addition, a dispersion method of powder particle basalt fiber was proposed to overcome the low dispersiveness of the fiber. The research findings lay the basis for the engineering application of basalt fiber.
basalt fiber, anti-erosion ability, mechanical properties, magnesium sulfate corrosion
Bassuoni M. T., Nehdi M. L. (2009). Durability of self-consolidating concrete to sulfate attack under combined cyclic environments and flexural loading. Cement and Concrete Research, Vol. 39, No. 3, pp. 206-226. http://dx.doi.org/10.1016/j.cemconres.2008.12.003
Bassuoni M. T., Nehdi M. L. (2009). Durability of self-consolidating concrete to sulfate attack under combined cyclic environments and flexural loading. Cement & Concrete Research, Vol. 39, No. 3, pp. 206-226.
Dong J. Q., Du Y. T., Wen B. L., Sun L. X., Wang J. Q. (2011). Research on mechanical properties and toughening mechanism of basalt fiber reinforced concrete. Industrial Construction, Vol. 41, No. S1, pp. 638-641.
Gao J. M., Yu Z. X., Song L. G. Wang T. X., Wei S. (2013). Durability of concrete exposed to sulfate attack under flexural loading and drying-wetting cycles. Construction and Building Materials, Vol. 39, No. 2, pp. 33-38. http://dx.doi.org/10.1016/j.conbuildmat.2012.05.033
Gao J. M., Yu Z. X., Song L. G. (2013). Durability of concrete exposed to sulfate attack under flexural loading and drying-wetting cycles. Construction and Building Materials, Vol. 39, pp. 33-38. http://dx.doi.org/10.1016/j.conbuildmat.2012.05.033
Gao R. D., Li Q. B., Zhao S. B., Yang X. M. (2010). Deterioration mechanisms of sulfate attack on concrete under alternate action. Journal of Wuhan University of Technology, Vol. 25, No. 2, pp. 355-359. https://doi.org/10.1007/s11595-010-2355-2
Jiang L., Niu D. T., Sun Y. Z. (2015). Damage layer and microscopic analysis of concrete under sulfate attack. Bulletin of the Chinese Ceramic Society, Vol. 34, No. 12, pp. 3462-3467. https://doi.org/10.1007/s11771-014-2482-6
Jin S. J., Li Z. L., Zhang J., Wang Y. (2015). Experimental study on anti-freezing and thawing performance of reinforced concrete of basalt fiber under corrosion condition. Engineering Mechanics, Vol. 32, No. 5, pp. 178-183. http://dx.doi.org/10.6052/j.issn.1000-4750.2014.04.0265
Liu D. W., Liu B. Y., Li X. D. (2015). Property analysis of concrete under coupling action of sulfate and wet-dry cycles. Hydro-Science and Engineering, No. 4, pp. 69-74.
Lu L. L., Wei J., Bi Q. W. (2017). Salt corrosion resistance of basalt fiber reinforced concrete in early age. Journal of Da Lian Jiao Tong university, Vol. 38, No. 3, pp. 88-91.
Mangat P. S., Gurusamy K. (1987). Chloride diffusion in steel fiber reinforced concrete containing PFA. Cement and Concrete Research, Vol. 17, No. 4, pp. 385-396. http://dx.doi.org/10.1016/0008-8846(87)90137-2
Sahmaran M., Erdem T. K., Yaman I. O. (2007). Sulfate resistance of plain and blended cements exposed to wetting-drying and heating-cooling environments. Construction and Building Materials, Vol. 21, No. 8, pp. 1771-1778. http://dx.doi.org/10.1016/j.conbuildmat.2006.05.012