提高跨海桥梁混凝土电阻率的措施

Measure of improve the concrete resistance of cross- sea bridge

钢筋的锈蚀是影响混凝土耐久性的最主要因素。如果混凝土的电阻率足够高,那么其就具有致密性高、渗透性低、锈蚀电流小和锈蚀率低等特点,从而能够有效地延缓或抑制钢筋的锈蚀,提高混凝土的耐久性。根据混凝土电阻率的影响因素总结了采取低水灰比、采用合适的水泥品种和用量、掺加掺合料等一系列的提高混凝土电阻率的措施。

The most important factors affecting the durability of concrete is rebar corrosion High impedance and high impervious concrete induced high density,permeability is low,corrosion current is small,corrosion rate is low and so on,can effectively delay or inhibit the corrosion of steel bars and enhance the durability of concrete.This text summary of a series of measures that adopting a low water-cement ratio,using the right variety and amount of cement,mixing with admixture,and so on to improve the resistivity of concrete based on the factors that affecting the resistivity of concrete.