“灯芯效应”下珊瑚骨料混凝土氯离子传输行为  

Chloride Transportation in Coral Aggregate Concrete Due to“Wick Action”

作　　者：罗大明[1,2] 周萌[1,2] 李凡[1,2] 牛荻涛 LUO Daming;ZHOU Meng;LI Fan;NIU Ditao(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Green Building,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学绿色建筑全国重点实验室,陕西西安710055

出　　处：《建筑材料学报》2023年第11期1173-1182,1206,共11页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52278217);陕西省教育厅青年创新团队建设科研计划项目(21JP059)。

摘　　要：研究了“灯芯效应”下珊瑚骨料混凝土在Mg^(2+)、SO_(4)^(2-)共同作用下Cl^(-)的传输规律,建立了“灯芯效应”下珊瑚骨料混凝土Cl^(-)传输模型.结果表明:Cl^(-)沿半浸泡混凝土高度方向由下而上传输的同时也由表层向中心传输,其在混凝土内部的含量呈类抛物面分布;SO_(4)^(2-)的存在会加快Cl^(-)在混凝土中的传输,而Mg^(2+)的加入会抑制Cl^(-)的传输,导致混凝土在相同高度及深度处的Cl^(-)含量小于SO_(4)^(2-)与Cl^(-)共同作用下的Cl^(-)含量;本文建立的“灯芯效应”下珊瑚骨料混凝土氯离子传输模型计算结果与实测结果吻合良好.The Cl^(-)transport law of coral aggregate concrete under the synergism of Mg^(2+)and SO_(4)^(2-) erosion was studied,and the Cl^(-)transportation model for coral aggregate concrete under the“wick action”was established.The results show that Cl^(-)is transported both from the bottom to the up and from the surface layer to the center longitudinal of the semi-immersed concrete,and the Cl^(-)in concrete exhibits a parabolic distribution.SO_(4)^(2-) will accelerate the transfer of Cl^(-)in concrete,while the addition of Mg^(2+)will inhibit the transfer of Cl^(-),resulting in the concentration of Cl^(-)at the same height and depth in concrete be smaller than that under the combined action of SO_(4)^(2-) and Cl^(-).The calculated results of the chloride ion transport model for coral aggregate concrete under the“wick action”established in this paper are in good agreement with the measured results.

关 键 词：珊瑚骨料混凝土 半浸泡 灯芯效应 氯离子传输 离子共同作用 

分 类 号：TU528.01[建筑科学—建筑技术科学]