C50高性能混凝土耐久性试验研究  

Experimental Study of Durability of C50 High Performance Concrete

作　　者：王斐峰[1] 邓学钧[1] 秦鸿根[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《桥梁建设》2005年第6期69-71,共3页Bridge Construction

摘　　要：滨州黄河大桥引桥是预应力混凝土连续梁桥,采用C50高性能混凝土.对将要选用的C50高性能混凝土进行了混凝土收缩、抗渗、碳化和钢筋锈蚀性能等试验研究.还对混凝土的抗氯盐侵蚀和抗硫酸盐侵蚀性能进行了试验.研究结果表明,掺加10%～18%粉煤灰有助于提高C50混凝土的耐久性.掺加的粉煤灰可以改善混凝土的干燥收缩性能和抗渗性,也可以改善混凝土抗氯盐和抗硫酸盐侵蚀的性能.The approach bridges of Binzhou Huanghe River Bridge are of prestressed concrete con timaous girder structures used with C50 high performance concrete. For the concrete to be used for the approach bridges, the experimental study of relevant performance of the concrete is conducted, in which the shrinkage, permeability, carbonization, reinforcement rusty corrosion, and chloride and sulphate diffusion attack are included. The results of the study indicate that the adding of 10%-18% flyash to the C50 high performance concrete can be helpful to improve the durability of the concrete, and the added flyash can also improve dry shrinkage, resistance to permeability, chloride and sulphate diffusion attack.

关 键 词：预应力混凝土桥 高性能混凝土 粉煤灰 耐久性 试验 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]