戈壁环境下玄武岩纤维混凝土中氯离子分布规律试验研究

Experimental Study on the Distribution Law of Chloride Ions of Basalt Fiber Reinforced Concrete Under Gobi Environment

为了探究戈壁环境下混凝土中氯离子的分布规律,以水胶比和玄武岩纤维掺量为变量,测定不同侵蚀深度下混凝土中氯离子质量分数,并通过混凝土氯离子扩散系数模型对不同水胶比、玄武岩纤维掺量的混凝土时间衰减系数进行归一化处理,通过回归计算得到了混凝土水胶比影响系数和玄武岩纤维掺量影响系数。研究结果表明,混凝土中氯离子质量分数随侵蚀周期的增加而增大。相同侵蚀周期下,混凝土中氯离子质量分数随着水胶比的降低逐渐减小;当玄武岩纤维掺量不超过0.10%时,混凝土抗氯离子侵蚀性能随着玄武岩纤维掺量的增加而提高。

In order to explore the distribution law of chloride ions in concrete under the Gobi environment,the mass fraction of chloride ions in concrete at different erosion depths was measured using the water cement ratio and basalt fiber content as variable.The time attenuation coefficient of concrete with different water cement ratios and basalt fiber contents was normalized by a concrete chloride ion diffusion coefficient model.The influence coefficients of concrete water cement ratio and basalt fiber content were obtained through regression calculation.The research results indicate that the mass fraction of chloride ions in concrete increases with the increase of erosion period.Under the same erosion cycle,the mass fraction of chloride ions in concrete gradually decreases with the decrease of water cement ratio;When the content of basalt fiber does not exceed 0.10%,the resistance of concrete to chloride ion erosion improves with the increase of basalt fiber content.