土工基础

›› 2019, Vol. 33 ›› Issue (5): 618-620.

• 工程实录 • 上一篇    下一篇

水泥改良铁尾矿路基填料的浸水强度试验研究

刘甲荣1，孙兆云2，苏建明1，魏 琨1   

  1. （1.山东高速股份有限公司，济南 250014； 2.高速公路养护技术交通行业重点实验室，济南 250102）
  • 收稿日期:2019-04-23 修回日期:2019-05-06 出版日期:2019-10-20 发布日期:2019-10-22
  • 作者简介:刘甲荣（1963-），男，研究员，研究方向为道路与桥梁工程。

Experimental Study on Saturated Strength of Cement-Modified Iron Mineral Tailings as Subgrade Material

LIU Jiarong1, SUN Zhaoyun2, SU Jianming1, WEI Kun1   

  1. (1.Shandong Expressway Co. Ltd., Jinan, 250014;
    2.Key Laboratory of Expressway Maintenance Technology, Ministry of Transportation, Jinan 250102)
  • Received:2019-04-23 Revised:2019-05-06 Online:2019-10-20 Published:2019-10-22

摘要： 铁尾矿具有特殊的物理、水理特性，经改良处理可用于路基填筑。为研究路基湿度状况变化对水泥改良铁尾矿填料强度的影响，通过浸水条件下的无侧限抗压强度和加州承载比试验对其强度损失与水稳定性进行对比分析。结果表明：水泥改良铁尾矿的水稳定性能良好，当水泥掺量为6%~8%时，浸水强度损失率小于15%，加州承载比大于100%，可为铁尾矿用于路基填筑的改良处理与性能评价提供借鉴和参考。

关键词: 铁尾矿, 路基工程, 水泥改良, 强度损失, 加州承载比

Abstract: Iron mineral tailings have special physical and hydraulic properties, it can be used for subgrade filling after soil improvement treatment. In order to study the effect of subgrade moisture condition variation on the strength of cement modified iron mineral tailings, the comparative analyses of strength reduction and moisture stability by the unconfined compressive strength and California bearing ratio tests under the immersion conditions. The results show that the cement improved iron mineral tailings have good moisture stability, when the cement content is in the range of 6%~8%, the reduction rate of the saturated strength is less than 15%, and the California bearing ratio value is greater than 100%. The evaluation results can provide reference for the improvement treatment and performance evaluation of iron mineral tailings for the pavement engineering projects.

Key words: Iron Mineral Tailings, Pavement Engineering, Cement Improvement, Strength Reduction, California Bearing Ratio