- 目录
- 混凝土与制品
- 首页
耐盐冻水泥基修补材料与旧混凝土粘结性能研究
作者：李国民
（通辽市公路管理处，内蒙古 通辽 028000）
摘要：通过耐盐冻水泥基修补材料（SRCBPM）与旧混凝土的劈裂抗拉试验，研究了旧混凝土的界面粗糙度、抗压强度、纳米SiO2改性SRCBPM以及盐冻条件下引气型旧混凝土对2种材料之间粘结强度的影响。结果表明：随着旧混凝土粗糙度和抗压强度的提高，SRCBPM与旧混凝土的粘结强度提高；掺入纳米SiO2能够提高SRCBPM与旧混凝土的粘结强度，随着旧混凝土强度等级的提高，纳米SiO2提高粘结强度效果逐渐下降；盐冻条件下，引气型旧混凝土与SRCBPM在60次盐冻循环下粘结强度损失率要明显小于非引气型旧混凝土。
关键词：耐盐冻修补材料；旧混凝土；粘结强度；粗糙度；纳米SiO2
中图分类号：TU528 文献标识码：A 文章编号：1001-702X（2019）04-0020-04
Study on the bonding properties of salt-resistant cement based patching material with old concrete
LI Guomin
（Tongliao Municipal Road Administration Office，Tongliao 028000，China）
Abstract：By salt-resistant cement based patching material（SRCBPM） and the old concrete splitting tensile test，studied the interfacial roughness of old concrete，compressive strength，nano-SiO2 modified SRCBPM and air-entraining old concrete under the condition of salt frozen impact on the bond strength of the two kinds material. The results showed that：with the increase of roughness and compressive strength of old concrete，the bond strength of SRCBPM and old concrete increases；Nano SiO2 can improve the bond strength of SRCBPM and old concrete，with the improvement of old concrete strength grade，the promotion effect of bond strength gradually decreases;Under the condition of salt frozen，the 60 times salt frozen cycle bond strength loss rate of air-entraining old concrete and SRCBPM is less than that of non air-entraining old concrete.
Key words：salt-resistant cement based patching material，old concrete，bond strength，roughness，nano-SiO2