The Frost-resisting Durability of High Strength Self-Compacting Pervious Concrete in Deicing Salt Environment
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2020年第1期
论文作者：封金财 ZONG Ningwen ZHU Pinghua 刘惠 YAO Lan GENG Jiang
文章页码：167 - 175
摘 要：A high strength self-compacting pervious concrete（SCPC） with top-bottom interconnected pores was prepared in this paper. The frost-resisting durability of such SCPC in different deicing salt concentrations（0%, 3%, 5%, 10%, and 20%） was investigated. The mass-loss rate, relative dynamic modulus of elasticity, compressive strength, flexural strength and hydraulic conductivity of SCPC after 300 freeze-thaw cycles were measured to evaluate the frost-resisting durability. In addition, the microstructures of SCPC near the top-bottom interconnected pores after 300 freeze-thaw cycles were observed by SEM. The results show that the high strength SCPC possesses much better frost-resisting durability than traditional pervious concrete（TPC） after 300 freeze-thaw cycles, which can be used in heavy loading roads. The most serious freeze-thaw damage emerges in the SCPC immersed in the 3% of Na Cl solution, while there is no obvious damage in 20% of Na Cl solution. Furthermore, it can be deduced that the high strength SCPC can be used for 100 years in a cold environment.
封金财，ZONG Ningwen，ZHU Pinghua，刘惠，YAO Lan，GENG Jiang
Department of Civil Engineering, Changzhou University
摘 要：A high strength self-compacting pervious concrete（SCPC） with top-bottom interconnected pores was prepared in this paper. The frost-resisting durability of such SCPC in different deicing salt concentrations（0%, 3%, 5%, 10%, and 20%） was investigated. The mass-loss rate, relative dynamic modulus of elasticity, compressive strength, flexural strength and hydraulic conductivity of SCPC after 300 freeze-thaw cycles were measured to evaluate the frost-resisting durability. In addition, the microstructures of SCPC near the top-bottom interconnected pores after 300 freeze-thaw cycles were observed by SEM. The results show that the high strength SCPC possesses much better frost-resisting durability than traditional pervious concrete（TPC） after 300 freeze-thaw cycles, which can be used in heavy loading roads. The most serious freeze-thaw damage emerges in the SCPC immersed in the 3% of Na Cl solution, while there is no obvious damage in 20% of Na Cl solution. Furthermore, it can be deduced that the high strength SCPC can be used for 100 years in a cold environment.
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