滨海环境中海砂混凝土受氯盐侵蚀的试验研究  

Experimental research on the influence of chloride attack on sea sand concrete in coastal environment

作　　者：苏卿[1] 姜福香[1,2] 赵铁军[2] 

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]青岛理工大学土木工程学院,山东青岛266033

出　　处：《西安建筑科技大学学报（自然科学版）》2010年第2期226-230,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金："973计划"课题(2009CB623203);国家"十一五"科技支撑计划(2006BAJ02B04)

摘　　要：作为混凝土主要组分之一的建筑砂,因受资源和环境影响制约,已无法满足工程建设的需求.而实践证明合理开发和使用海砂是缓解河砂供需矛盾的有效方法.通过室内、外对比试验,定量分析了河砂和海砂混凝土受氯盐侵蚀后,氯离子在混凝土中的含量与分布.试验结果表明:使用原状海砂显著增大了混凝土的初始氯离子含量;而长期暴露在滨海环境的海砂混凝土结构,不仅要经受干湿循环的影响,其内部钢筋更要遭受"混入"和"渗入"氯离子的共同作用,为钢筋锈蚀埋下了极大的隐患.As one of the main components of concrete, the river sand can＇t satisfy the increasing demand of construction owing to the limited resources and environmental impact. Much as the sea sand used in concrete is controversial, it is Still an effective measure to relieve the shortage of sand. The contribution presents the chloride profile of concrete with sea sand conerete and river sand obtained by continuous laboratory testing and outdoor testing. The results indicate that the initial chloride content of sample composites of sea sand reaches 0.16 % by weight of concrete, the property of fine aggregate plays a pronounced role in the permeability of concrete. And the concrete exposed to coastal environment will be seriously affected by drying-wetting cycles, which greatly accelerates the chloride penetration into conerete.

关 键 词：海砂 初始氯离子含量 潮汐区 干湿循环 

分 类 号：TU398.1[建筑科学—结构工程]