辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(6)：699-710,12.DOI:10.11956/j.issn.1008-0562.20230461
海水-冻融共同作用下透水混凝土性能损伤及寿命预测
Performance damage and life prediction of pervious concrete under seawater-freeze-thaw coupling
摘要
Abstract
In order to solve the problem that pervious concrete used in northern coastal cities is susceptible to seawater-freeze-thaw co-action in winter,orthogonal tests were used to investigate the effects of slag(GBFS)substitution rate,hydroxypropylmethylcellulose(HPMC)admixture,and polypropylene imitation steel fiber(PPTF)admixture on macroscopic properties and microstructural changes of the pervious concrete blocks after seawater-freeze-thaw co-action for 25,50,and 75 times,and the NSGM(1,N)model was used to predict the relative dynamic elastic modulus of pervious concrete after seawater-freeze-thaw co-action.The NSGM(1,N)model was applied to predict the relative dynamic elastic modulus of permeable concrete after seawater-freeze-thaw.The results show that the permeable concrete has the best seawater-freeze-thaw resistance when the GBFS substitution ratess 20％and the HPMC and PPTF admixture are 0.15％and 0.5％,respectively;after seawater erosion,the generation of expansive substances accelerated the crack extension,and the supportive anchoring effect of PPTF suppressed the crack generation and extension.The test index a of the prediction accuracy of the NSGM(1,N)model is in[-3,2),and the average relative error is within the range of grade Ⅱ error.The NSGM(1,N)model can be used for long-term prediction of the relative dynamic elastic modulus.关键词
矿渣/羟丙基甲基纤维素/聚丙烯仿钢纤维/透水混凝土/海水-冻融/NSGM(1,N)模型Key words
slag/hydroxypropyl methylcellulose(HPMC)/polypropylene plastic steel fiber(PPTF)/pervious concrete/sea water freeze-thaw/NSGM(1,N)model分类
建筑与水利引用本文复制引用
闫希雯,王学志,辛明,贺晶晶..海水-冻融共同作用下透水混凝土性能损伤及寿命预测[J].辽宁工程技术大学学报（自然科学版）,2024,43(6):699-710,12.基金项目
辽宁省教育厅高校基本科研项目(LJKMZ20220979) （LJKMZ20220979）
中国电建集团西北勘测设计研究院课题(XBY-PTKJ-2022-12) （XBY-PTKJ-2022-12）
