防灾减灾工程学报2024，Vol.44Issue(3)：551-559,9.DOI:10.13409/j.cnki.jdpme.20230331001
水泥基矽土注浆材料抗海水侵蚀性能研究
Study on Seawater Erosion Resistance of Cement-Based Silica Grouting Material
摘要
Abstract
To study the seawater erosion resistance of cement-based silica grouting material,an artifi-cial seawater solution was prepared based on the hydrochemical analysis of seawater near the project site.The solution was used to immerse and cure the grouted stone samples.Tests on compressive strength,L-NMR,XRD,FTIR,and FT-IR,and SEM,were conducted on specimens at different ages to reveal the changes in erosion resistance over time.The results indicate that the corrosion resis-tance of the material initially increased and then decreased with prolonged exposure.In the early stages of erosion,the"filling effect"of erosion products and the"salt excitation"effect of erosion ions opti-mized the pore size distribution of the grouted stone,with the maximum erosion resistance K observed at 7 days.The K values for water-cement ratios of 0.7,1.0 and 1.5 were 1.26,1.23 and 1.18,respec-tively,before gradually decreasing.After 60 days,erosion products like Aft and Friedel's salt compro-mised the hardened grout structure,causing small pores to transform into larger ones,resulting in a K value less than 1.0.At a water-cement ratio of 1.5,the K value at 180 days was only 0.45.Under the same erosion conditions,the erosion resistance varied with different water-cement ratios,with lower ratios exhibiting stronger resistance.Therefore,when CIS is used for grouting in coastal regions,it is recommended to minimize the water-cement ratio while ensuring the injectability of the grout.关键词
注浆材料/海水侵蚀/龄期/力学性能/微观结构Key words
grouting material/seawater erosion/aging/mechanical properties/micro-structure分类
建筑与水利引用本文复制引用
林久卿,牛昊,刘致延,李晓亮,王彦哲,李召峰,陈经棚..水泥基矽土注浆材料抗海水侵蚀性能研究[J].防灾减灾工程学报,2024,44(3):551-559,9.基金项目
山东省自然科学基金重点项目(ZR2020KE006) （ZR2020KE006）
山东省重点研发计划(重大科技创新工程)项目(2021CXGC010301) （重大科技创新工程）
云南省重点研发计划(202103AA080016)资助 （202103AA080016）
