论文部分内容阅读
为了研究酸性环境对富水充填材料的影响,通过强度检测、扫描电镜、能谱分析及X射线衍射(XRD)等实验手段,分析富水充填材料在酸性环境中浸泡后的宏观性能及微观结构变化,并探讨其腐蚀及劣化机理.结果表明:富水充填材料在p H值为1和3的盐酸溶液中浸泡180 d后抗压强度比标养28 d的强度分别降低88.8%和58%,在p H值为3的硫酸溶液中浸泡后降低68%,p H值为1的硫酸溶液中浸泡后强度降为零;微观实验结果显示随着富水充填材料在硫酸溶液中浸泡时间的延长,试件内部有二水石膏生成,盐酸溶液中试件仅在p H值为1的溶液中浸泡180 d后产生二水石膏;盐酸溶液对富水充填材料的腐蚀主要为H+中和作用下硬化体结构的溶解腐蚀,硫酸溶液对材料的腐蚀为硬化体结构的溶解腐蚀和石膏的膨胀腐蚀;硫酸溶液对富水充填材料的腐蚀作用强于盐酸溶液.
In order to study the influence of acidic environment on water-rich filler material, macroscopic properties and microstructure of water-rich filler after soaking in acidic environment were analyzed by means of intensity measurement, scanning electron microscopy, energy spectrum analysis and X-ray diffraction (XRD) The results showed that the compressive strength of water-rich filler material decreased by 88.8% and 58%, respectively, than that of the 28th d after immersing for 180 d in hydrochloric acid solutions with pH 1 and pH 3, , Which is reduced by 68% in a sulfuric acid solution with a pH of 3 and a strength of zero in a sulfuric acid solution with a pH of 1 after immersing in a sulfuric acid solution with a pH value of 3. The microscopic experimental results show that with the immersion time of the water-rich filler material in a sulfuric acid solution , And the sample has dihydrate gypsum inside. The sample in hydrochloric acid solution only produces dihydrate gypsum after soaking for 180 d in the solution with p H value of 1. The corrosion of hydrochloric acid solution to water-rich filling material is mainly H + neutralization Under the hardening of the body structure of the dissolution of corrosion, sulfuric acid solution on the corrosion of the material for the hardening of the body structure of the dissolution of corrosion and expansion of gypsum corrosion; sulfuric acid solution of water-rich filler corrosion is stronger than the hydrochloric acid solution.