| 离子土壤固化剂固化红黏土强度特性 |
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| 引用本文： | 游庆龙,邱欣,杨青,吴金洪.离子土壤固化剂固化红黏土强度特性[J].中国公路学报,2019,32(5):64-71. |
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| 作者姓名： | 游庆龙 邱欣 杨青 吴金洪 |
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| 作者单位： | 1. 长安大学 公路学院, 陕西 西安 710064;2. 浙江师范大学 工学院, 浙江 金华 321004 |
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| 基金项目： | 国家自然科学基金项目（51408550）；浙江省自然科学基金项目（Q14E080021）；浙江省新苗人才计划项目（2015R404053） |
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| 摘 要： | 为研究液态离子型土壤固化剂加固红黏土的强度特性,采用美国Road Bond公司生产的液态离子型土壤固化剂对浙江金华地区的红黏土进行加固。在试验确定的最佳离子土壤固化剂掺量0.014%条件下,通过在试样土中加入不同掺量水泥、石灰,成型2种不同压实度(96%、98%)试件,分别进行固化土混合料的抗压回弹模量、抗压强度、劈裂强度和冻融强度试验,分析离子土壤固化剂加固红黏土的强度变化规律,并铺筑试验路进行验证。研究结果表明:红黏土中加入离子土壤固化剂后,其塑性指数有所降低,形成更为密实结构,固化剂、水泥或石灰的掺入都能增加混合料的抗压回弹模量,且在其他条件相同的情况下,掺入石灰对抗压回弹模量的增强效果优于水泥;各配合比混合料的7 d无侧限抗压强度受压实度影响较为显著,98%压实度固化效果优于96%压实度,固化剂、水泥、石灰的掺入均可较好提升试件的劈裂强度,随着水泥掺量的增加,其冻融抗压强度损失BDR也随之提高,其抗冻性能越好。结合现场试验路的情况,建议在实际工程中严格控制其压实度。
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| 关 键 词： | 道路工程 加固土 试验研究 离子土壤固化剂 红黏土 抗压强度 |
| 收稿时间： | 2018-03-05 |
Strength Properties of Ionic Soil Stabilizer Treated Red Soil |
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| YOU Qing-long,QIU Xin,YANG Qing,WU Jin-hong.Strength Properties of Ionic Soil Stabilizer Treated Red Soil[J].China Journal of Highway and Transport,2019,32(5):64-71. |
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| Authors: | YOU Qing-long QIU Xin YANG Qing WU Jin-hong |
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| Affiliation: | 1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China;2. School of Engineering, Zhejiang Normal University, Jinhua 321004, Zhejiang, China |
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| Abstract: | To study the strength performance of red soil treated by the liquid Ionic Soil Stabilizer, red soil obtained from the area of Jinhua in Zhejiang province was treated with the stabilizer produced by Road Bond Corporation of USA. Under conditions of optimal Ionic Soil Stabilizer contents, varying amounts of Portland cement or lime were added to the sample soil, molding specimens of two different compaction degrees (96%, 98%). Subsequently, different tests, such as, the resilient modulus test, compressive strength test, splitting strength test, and freeze-thaw strength test were conducted on the solidified soil mixture. Next, the varying intensities of the red soil reinforced by the Ionic Soil Stabilizer was analyzed and verified on a test road. The results show that after the addition of ionic soil-curing agent in the red soil, the plasticity index of the soil decreases to form a denser structure. Adding Ionic Soil Stabilizer along with cement or lime modifies the compressive modulus of resilience of the mixture. Under the same conditions, the compressive modulus of resilience increases in range when lime is added in a greater proportion than cement. The influence of the degree of compaction is significantly greater for the 7 d's unconfined compressive strength for mixtures of different ratios-98% versus 96%. Moreover, adding Ionic Soil Stabilizer, cement, or lime can also increase the splitting strength of the specimen. An increase in the content of cement increases the freeze-thaw damage BDR. The tests show that the compaction degree needs to be strictly controlled. |
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| Keywords: | road engineering stabilized soil experimental research ionic soil stabilizer red soil compressive strength |
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