Effect of SAP on Properties of High Performance Concrete under Marine Wetting and Drying Cycles  

作　　者：Ouattara Coumoin Cherel WANG Fazhou YANG Jin LIU Zhichao Ouattara Coumoin Cherel;WANG Fazhou;YANG Jin;刘志超(State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Civil Engineering and Architecture,Hubei University of Technology,Wuhan 430070,China;State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China)

机构地区：[1]State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China [2]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [3]School of Civil Engineering and Architecture,Hubei University of Technology,Wuhan 430070,China [4]State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2019年第5期1136-1142,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Key Research and Development Program of China(No.2017YFB0310000);Opening Project of State Key Laboratory of Green Building Materials(No.YA-584);the Key Technology Innovation Program from the Ministry of Science and Technology(Hubei Province)(No.2018AAA004)

摘　　要：The internal curing effect of superabsorbent polymer(SAP) on the properties of high performance concrete(HPC) under marine wetting and drying cycles(WD cycles) was investigated. Compressive strength, hydration and chloride migration were experimentally investigated and the results were evaluated by compasison with those under fresh water curing(FW). Water absorption and porosity were also evaluated only under WD cycles. The results showed the important influence of wetting and drying cycles on the properties of SAP modified HPC properties. Carefully designed, SAP minimized the long-term compressive strength of HPC under marine WD cycles. The hydration rate was faster in the initial curing, but became lower as compared with that cured in FW. In addition, SAP improved the long-term water absorption resistance and chloride migration resistance of HPC under marine WD cycles. The examination of the porosity showed a lower increase of the volume of capillary pores in SAP modified HPC under long term WD cycles compared with that without SAP. Therefore, internal curing by SAP could improve the durability properties of HPC under marine WD cycles.The internal curing effect of superabsorbent polymer(SAP) on the properties of high performance concrete(HPC) under marine wetting and drying cycles(WD cycles) was investigated. Compressive strength, hydration and chloride migration were experimentally investigated and the results were evaluated by compasison with those under fresh water curing(FW). Water absorption and porosity were also evaluated only under WD cycles. The results showed the important influence of wetting and drying cycles on the properties of SAP modified HPC properties. Carefully designed, SAP minimized the long-term compressive strength of HPC under marine WD cycles. The hydration rate was faster in the initial curing, but became lower as compared with that cured in FW. In addition, SAP improved the long-term water absorption resistance and chloride migration resistance of HPC under marine WD cycles. The examination of the porosity showed a lower increase of the volume of capillary pores in SAP modified HPC under long term WD cycles compared with that without SAP. Therefore, internal curing by SAP could improve the durability properties of HPC under marine WD cycles.

关 键 词：SUPERABSORBENT polymer(SAP) high performance concrete WETTING and DRYING cycles internal CURING 

分 类 号：TU5[建筑科学—建筑技术科学]