CAJ | 학술논문

为研究裂缝对混凝土中氯离子侵蚀作用的影响，设计了受弯开裂构件，模拟海工环境进行了干湿循环试验，对混凝土构件中氯离子的含量进行测试分析。试验结果表明：构件开裂后氯离子对流扩散区的深度在15～25 mm之间；宏观裂缝加速了氯离子的侵蚀过程，并且以裂缝为新界面，为氯离子的二维扩散提供条件。通过对试验数据总结分析和模拟，基于Fick第二定律提出了综合考虑了时间衰减，裂缝宽度和氯离子结合系数的氯离子扩散模型。
위연구렬봉대혼응토중록리자침식작용적영향，설계료수만개렬구건，모의해공배경진행료간습순배시험，대혼응토구건중록리자적함량진행측시분석。시험결과표명：구건개렬후록리자대류확산구적심도재15～25 mm지간；굉관렬봉가속료록리자적침식과정，병차이렬봉위신계면，위록리자적이유확산제공조건。통과대시험수거총결분석화모의，기우Fick제이정률제출료종합고필료시간쇠감，렬봉관도화록리자결합계수적록리자확산모형。
To explore the influence of cracks on chloride diffusion in concrete,a simulated marine environment test is designed,measur-ing the chloride ion content of the pre-cracking components through different wet-dry cycles. The experimental results show that the depth of chlorine ions convection region is 15~25 mm. Macro crack aggravated chloride ions transportation and thereby provided condi-tions for the two-dimensional diffusion of chloride ions based on the cracks as new interface. The chloride diffusion coefficient model is presented considering the time decay,crack width and chloride ion binding coefficient by analyzing and simulating the experimental data.