有害离子对橡胶水泥土抗侵蚀性能的影响研究

Study on effect of harmful ion to the anti-erosion performance of rubberized cement-soil

为了研究橡胶水泥土在侵蚀性土壤环境中的工作性能,研究了不同浓度的NaCl和Na2SO4溶液、不同橡胶粉掺量以及不同橡胶粉粒径等因素对橡胶水泥土抗侵蚀性能的影响。试验表明,掺入橡胶粉后,橡胶水泥土的抗Cl-、SO42-离子侵蚀能力与水泥土相比,均有不同程度的提高;橡胶水泥土随侵蚀溶液浓度加大,抗压强度呈下降趋势,其中SO42-离子对橡胶水泥土侵蚀能力要大于Cl-离子的侵蚀能力;随着侵蚀时间的增加,橡胶水泥土的无侧限抗压强度先增后降;掺粒径30目橡胶粉的水泥土抗离子侵蚀能力强于掺60目橡胶粉的。研究表明,橡胶水泥土的抗有害离子侵蚀性能优于普通水泥土,能够在含有Cl-、SO42-离子等侵蚀性土壤中良好工作。

In order to study the working performance of rubberized cement-soil （RCS for short） in corrosive soil environment, effects of different concentration of NaCl and NaESO4 solution, different rubber powder content and different particle diameter on anti-erosion performance of RCS are analyzed. Test results indicate that comparing with cement-soil, RCS has better performance in resistance of Cl^- and SO4^2- ion erosion. As concentration of etching solution is gradating,the compressive strength of RCS shows descending trend. In which,the erosion ability of SO42^- ion is more serious than Cl^-. As the time of erosion increasing, the unconfined compressive strength of RCS increases at first,then declines. The ion erosion resistance ability of 30-order RSC is better than that of 60-order RSC. Study results indicate that RSC has better performance to resistance harmful ions than that of normal cement soil and can have a good reaction in the SO4^2- or Cl^- solution corrosive soil circumstance.