碾压混凝土层间渗透系数的试验研究  

Experimental Study of RCC Interlayer Permeability Coefficient

作　　者：娄亚东 王振宇[1] 王凯[1] 刘国华[1] 

机构地区：[1]浙江大学水工结构与水环境研究所,杭州310058

出　　处：《科技通报》2016年第3期171-174,188,共5页Bulletin of Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助(2013CB035901)

摘　　要：采用碾压混凝土层间渗透系数测定仪研究了不同层间间隔时间对碾压混凝土层面渗透性的影响,并讨论了不同层面处理方式对碾压混凝土层面渗透性能的改善效果。试验表明:随着层间间隔时间的延长,碾压混凝土层面相对渗透系数逐渐增大,尤其是终凝后出现冷缝,渗透系数增加了一个数量级,用纳米Si O2和膨胀剂改性垫层砂浆来处理终凝后的层面冷缝一定程度上可以降低碾压混凝土层面渗透系数,为改善碾压混凝土层面抗渗性能,提高碾压混凝土层间结合性质提供依据。With the RCC interlayer permeability coefficient tester, the effects of different time intervals between layers on the permeability of RCC layers are studied and different interlayer-processing methods are discussed.As is showed by the result, with the increase of different time intervals between layers, the relative permeability coefficient of RCC layers tends to be greater. Furthermore, the permeability coefficient rises an order of magnitude since cold joint occurs after final setting. However, the permeability coefficient of layers processed by bedding mortar mixed with nano-silica and sweller respectively can be reduced to a certain extent, based upon which the improvement of performance of anti-permeability of RCC layers and thus of its binding properties between layers may be possible.

关 键 词：碾压混凝土 层间间隔时间 层面处理方法 膨胀剂 纳米SIO2 

分 类 号：TU528[建筑科学—建筑技术科学]