海水作用下的混凝土渗透性研究

Study on Diffusion Coefficients and Electric Fluxes of Concrete Under Seawater

根据海水浸泡混凝土中的氯离子渗透方向,测试时通过调整试样夹持方向,研究了正反两个方向测试的扩散系数和电通量,并研究了海水浸泡作用下混凝土的氯离子渗透深度、强度。结果表明,随着海水浸泡时间的延长,反方向测试的扩散系数逐渐减小,而正方向测试的扩散系数逐渐增大;正反两个方向测试的电通量均明显减小,反方向测试的电通量稍小于正方向的。随着浸泡时间的延长,混凝土内氯离子渗透深度逐渐增加,渗透深度与时间近似成直线关系;海水浸泡试样抗压强度较标样试样增长稍快。

By adjusting the testing sample clamping direction according to the chloride ion penetrate direction of con- crete immersed in seawater, the diffusion coefficients and electric fluxes of both positive and negative direction were studied, and the chloride ion penetration depths, strengths were studied. The results showed that, with the extension of seawater immersion time, the diffusion coefficients of the opposite direction decreased, the diffusion coefficients of the positive direction is increased, The electric fluxes of both positive and negative direction were significantly reduced, and the electric fluxes of opposite direction were slightly smaller than the positive direction. The chloride ion penetration depths of concrete increased with the immersion time extended, and the immersion time and the penetration depths was approximately a linear relationship. The compressive strengths of concrete of seawater immersion were slightly higher than the standard cured one＇s.