摘要The strength characteristics of solidified desert aeolian sandy soil are investigated to expand its scope of application in road engineering. Its suitability as sub-base of pavement structure is analyzed in terms of its strength. The unconfined compressive strengths of the solidified desert aeolian sandy soil specimens with different contents of curing agent are measured using a pavement material strength meter. The microstructures of aeolian sand and the solidified aeolian sandy soil to which the curing agent PX is added are analyzed by scanning electron microscopy(SEM). The strength characteristics and strength formation mechanism of the solidified Aeolian sandy soil are revealed by the analyses. The results point to the following conclusions: (1) the solidified aeolian sandy soil with 10% PX and cured for 7 d achieves an unconfined compressive strength that meets the strength requirement of the pavement sub-base. (2) the strength of the solidified soil is associated with the content of PX, and the optimal dosage is10%. (3) the SEM image shows that intergranular filling consisting of gel and cumularspharolith is formed after adding the curing agent PX. This formation changed the adhesive strength between the soil particles, accounting for the chief cause of the increase in overall strength.
Abstract：The strength characteristics of solidified desert aeolian sandy soil are investigated to expand its scope of application in road engineering. Its suitability as sub-base of pavement structure is analyzed in terms of its strength. The unconfined compressive strengths of the solidified desert aeolian sandy soil specimens with different contents of curing agent are measured using a pavement material strength meter. The microstructures of aeolian sand and the solidified aeolian sandy soil to which the curing agent PX is added are analyzed by scanning electron microscopy(SEM). The strength characteristics and strength formation mechanism of the solidified Aeolian sandy soil are revealed by the analyses. The results point to the following conclusions: (1) the solidified aeolian sandy soil with 10% PX and cured for 7 d achieves an unconfined compressive strength that meets the strength requirement of the pavement sub-base. (2) the strength of the solidified soil is associated with the content of PX, and the optimal dosage is10%. (3) the SEM image shows that intergranular filling consisting of gel and cumularspharolith is formed after adding the curing agent PX. This formation changed the adhesive strength between the soil particles, accounting for the chief cause of the increase in overall strength.
刘俊芳, 苏跃宏. 固化沙漠风积砂土强度特性分析[J]. Journal of Highway and Transportation Research and Development, 2017, 11(2): 32-36.
LIU Jun-fang, SU Yue-hong. Analyses of the Strength Characteristics of Solidified Desert Aeolian Sandy Soil. Journal of Highway and Transportation Research and Development, 2017, 11(2): 32-36.
[1] MA Shi-bin, CHANG Jun-ying, WEI Lian-yu, et al. Orthogonal Experiment Research on Cement Stabilized Aeolian Sand and Macadam Base Course[J]. Journal of Chongqing Jiaotong University, 2004, 10(5):48-51.(in Chinese)
[2] DENG Ya-hong, LI Xi-an, WANG Zhi-jun, et al. Study on Dynamic Strength of the Aeolian Sand in Maowusu Desert Area[J].Engineering Mechanics, 2004, 29(12):281-286. (in Chinese)
[3] GUO Yu-fen, CUI Jing-xiang, ZHANG Chun-gang, et al. Research on the Rubbing Coefficient of Geosytheic and Aeolian Sand[J]. Journal of Wuhan University of Technology, 2007, 29(9):160-161, 166. (in Chinese)
[4] SU Yue-hong, LIU Jun-fang, FENG Lei, et al. An Experimental Study on the Performance of Eolian Sand Used in Road Construction[J].Journal of Inner Mongolia University of Technology, 2005, 24(1):57-61. (in Chinese)
[5] LI Jun-dan,WANG Jia-di. Mixture Ratio Design of Firming Agent Stable Wind Blown Sand[J]. Journal of Liaoning Provincial College of Communications, 2007, 9(1):22-24. (in Chinese)
[6] WANG Chao-hui, WANG Xuan-cang, TAN Xue-qin. Preparation of Road Aeolian Sand Curing Agent and Its Mixture Performance[J].Journal of Central South University:Science and Technology, 2011, 42(1):192-198. (in Chinese)
[7] ZHANG Ping, DING Yi, WU Hao. Solidified Technology for Aeolian Sand in Shenyang[J].Journal of Shenyang University:Natural Science Edition, 2012, 24(3):82-86. (in Chinese)
[8] LI Sheng-jun. Effects Produced by Environmental Factors on Strength of the Solidified Aeolian Sandy[D]. Huhhot:Inner Mongolia University of Technology, 2012. (in Chinese)
[9] JTG D50-2006, Specifications for Design Highway Asphalt Pavement[S]. (in Chinese)
[10] BAI Bing, ZHOU Jian. The Applications and Advances of SEM in Geotechnical Engineering[J].Journal of Chinese Electron Microscopy Society, 2001, 20(2):154-160. (in Chinese)
[11] SHI Bin, JIANG Hong-tao. Research on the Analysis Techniques for Clayey Soil Microstructure[J]. Chinese Journal of Rock Mechanics and Engineering, 2001, 20(6):864-870. (in Chinese)
[12] WEI Tang-zhong, LI Pei-ning. Microcosmic Research on Coastal Saline Soil Improvement Mechanism[J]. Highways & Automotine Applications, 2012(6):127-130,139. (in Chinese)
[13] FAN Heng-hui, WU Pu-te, GAO Jian-en, et al. Microstructure Characteristics of Soil Stabilized with Cement-based Soil Stabilizer[J].Journal of Building Materials, 2010, 13(5):669-674. (in Chinese)
[14] SHI Bin. A Simple Quantitative Analysis Methods for Microstructure of Clayey Soil[J]. Hydrogeology and Engineering Geology, 1997(1):7-10. (in Chinese)
[1]
李宁, 马骉, 李瑞, 司伟. 基于PUMA的单级和多级加载模式下级配碎石性能研究[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 1-12.
[2]
许海亮, 任合欢, 何兆才, 何炼. 车路耦合条件下沥青混凝土路面变形特性时域分析[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 13-19.
[3]
杜健欢, 艾长发, 黄超, 郭玉金, 蒋运兵. 界面水对沥青复合小梁疲劳性能的影响试验[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 1-7.
[4]
姚国强, 言志信, 龙哲, 翟聚云. 基于岩质边坡相似材料的锚固界面剪应力分布规律研究[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 8-15.
[5]
刘泽, 何矾, 黄天棋, 蒋梅东. 车辆荷载在挡土墙上引起的附加土压力研究[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 16-23.
[6]
阳逸鸣, 彭建新, 张建仁. 服役桥梁构件随机场参数估计及相应方法比较分析[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 38-49.
[7]
邱欣, 徐静娴, 陶钰强, 杨青. 路面结冰条件判别标准及SVM预测分析研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 1-9.
[8]
高伟, 崔巍, 李秀凤. 半刚性基层表面抗冲刷性能试验与分析[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 10-17.
[9]
张向东, 任昆. 煤渣改良土路基的动弹性模量及临界动应力试验研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 25-32.
[10]
刘栋, 尚小亮, 杨西海. 垃圾焚烧炉渣中可溶盐对水泥稳定材料性能的影响[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 18-24.
[11]
李龙海, 杨茹. 多次加铺的复合道面疲劳寿命分析[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 7-15.
[12]
蔡旭, 李翔, 吴旷怀, 黄文柯. 基于旋转压实的水泥稳定再生集料设计方法研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 1-6.
[13]
李金路, 冯子强, 吴佳杰, 魏姗姗, 葛智. 环境及疲劳荷载作用下碳纳米管水泥基复合材料压敏性能研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 16-21.
[14]
田小革, 韩海峰, 李新伟, 吴栋, 魏东. 半刚性路面中双层半刚性基层的倒装效应[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 22-27.
[15]
邢磊, 雷柏龄, 陈忠达, 戴学臻. 彩色沥青路面胶凝材料的制备技术[J]. Journal of Highway and Transportation Research and Development, 2018, 12(2): 1-6.
2017, Vol. 11 
