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冰川冻土 ›› 2016, Vol. 38 ›› Issue (1): 192-199.doi: 10.7522/j.issn.1000-0240.2016.0022

• 寒区科学与技术 • 上一篇    下一篇

寒区水泥固化土力学性能影响因素分析

周海龙, 申向东, 薛慧君, 樊浩伦   

  1. 内蒙古农业大学 水利与土木建筑工程学院, 内蒙古 呼和浩特 010018
  • 收稿日期:2015-11-26 修回日期:2016-01-15 出版日期:2016-02-25 发布日期:2016-05-30
  • 通讯作者: 申向东,E-mail:ndsxd@163.com. E-mail:ndsxd@163.com
  • 作者简介:周海龙(1981-),男,内蒙古丰镇人,副教授,2006年在重庆交通大学获硕士学位,现主要从事水工新材料方面的研究.E-mail:ndsjyzhl@126.com
  • 基金资助:
    国家自然科学基金(51069008);教育部创新团队发展计划(IRT13069);内蒙古自治区高等学校科学研究项目(NJZZ16057)资助

Analysis of the factors affecting the mechanical properties of cement concrete-stabilized soil in cold regions

ZHOU Hailong, SHEN Xiangdong, XUE Huijun, FAN Haolun   

  1. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Received:2015-11-26 Revised:2016-01-15 Online:2016-02-25 Published:2016-05-30

摘要: 为了在北方寒区推广和应用水泥固化土建造保暖性房屋和设施农业,采用内蒙古黄河灌区周边典型的粉质土,利用普通硅酸盐水泥固化土体,配制水泥固化土,采用静力机械压实法和人工分层击实法分别制作了Φ50mm×H50mm和Φ39.1mm×H80mm两种不同规格的试件,并进行了无侧限抗压强度室内试验,研究了不同水泥掺入比、不同养护龄期、不同规格及成型方法对水泥固化土无侧限抗压强度的影响,得出了不同试验条件下水泥固化土的强度变化规律.试验结果表明:强度均随水泥掺入比及龄期的增大而增大,三者之间较好地满足空间平面模型,偏回归分析表明,水泥掺入比较龄期对强度的影响贡献更大,两种规格试件的强度之间较好地满足对数关系;不同规格及成型方法的试件对水泥固化土强度的影响规律不同,Φ39.1mm×H80mm试件存在一个临界水泥掺入比与临界养护龄期,当超过这个值时,其强度增长率减小.

关键词: 水泥固化土, 水泥掺入比, 养护龄期, 无侧限抗压强度, 寒区

Abstract: In order to spread and application of cement-stabilized soil to build heat retention houses and facility agriculture in cold regions, cement-stabilized soil has been prepared with Portland cement and typical silty soil, which is widely distributed in the Yellow River irrigation regions located in Inner Mongolia Autonomous Region. Two specimens, Φ50 mm×H50 mm and Φ39.1 mm×H80 mm, were made by static mechanical compaction and artificial layered compaction, respectively. A series of laboratory tests on the cement-stabilized soil were carried out, with consideration of the factors such as cement mixing ratio, curing age, specification, molding method and so on. The strength variation of cement-stabilized soil under different conditions were obtained by comparison. The result shows that the strength of cement-stabilized soil increases with cement mixing ratio and curing age, and among the strength of cement-stabilized soil, cement mixing ratio and age there is a relation following the space plane model. Partial regression analysis shows that cement mixing ratio contributes more than age. There is logarithmic relationship between the strengths of the specimens with different specification and molding method; the specimens from different specification and molding method have different effect. There are critical cement mixing ratio and critical curing age for Φ39.1 mm× H80 mm specimen. Once exceeding the two critical values, the strength growth rate would decrease.

Key words: cement-stabilized soil, cement mixing ratio, curing age, unconfined compressive strength, cold regions

中图分类号: 

  • TU502+.6