不同生物聚合物类型稳定粘土的土壤一致性和颗粒间特性

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL
Zhanbo Cheng, Xueyu Geng
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引用次数: 4

摘要

利用生物聚合物稳定土体的环境友好型改良方法目前已受到岩土工程实践的广泛关注。现有的关注主要集中在生物聚合物处理粘土后由于电相互作用的发生而产生的性能。因此,在生物聚合物的应用方面,应首先探索生物聚合物类型和含水量对生物聚合物-粘土混合物行为的影响。在本研究中,进行了落锥试验,以评估8种生物聚合物处理过的粘土,如卡拉胶卡帕胶(KG)、槐豆胶(LBG)、黄原胶(XG)、琼脂胶(AG)、瓜尔胶(GG)、海藻酸钠(SA)、结冷胶(GE)和壳聚糖(CH)在不同生物聚合物浓度下(例如,生物聚合物与土壤质量比在0.1%至5%之间)的稠度变化。结果表明,中性生物聚合物(如LBG和GG)无论浓度如何,都能显著提高液限和不排水剪切强度。负电荷生物聚合物(KG、SA、GE和XG)处理粘土的液限和不排水抗剪强度先减小后增大,AG和CH对土壤稠度有限制作用。此外,塑性指数的变化趋势与液限相似,改变了生物聚合物处理粘土的USCS分类为粉砂或粘土。此外,还建立了生物聚合物处理粘土的不排水剪切强度和剪切粘度的经验方程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soil consistency and interparticle characteristics of various biopolymer types stabilization of clay
An environmentally friendly improvement method with using biopolymer stabilization of soil has been currently paid more attention for geotechnical engineering practices. And the existing concerns focused on the performance of biopolymers treated clay due to the occurrence of electrical interaction. Therefore, the effect of biopolymer types and water content on the behaviors of biopolymer-clay mixture should be firstly explored in terms of biopolymer applications. In this study, fall cone tests were conducted to evaluate the consistency variations of eight types of biopolymers treated clay, e.g., carrageenan kappa gum (KG), locust bean gum (LBG), xanthan gum (XG), agar gum (AG), guar gum (GG), sodium alginate (SA), gellan gum (GE) and chitosan (CH) at various biopolymer concentrations (e.g., between 0.1% to 5% biopolymer to soil mass ratio). The results indicated that neutral biopolymers (e.g., LBG and GG) significantly caused the increase of liquid limit and undrained shear strength regardless of biopolymer concentration. And the liquid limit and undrained shear strength of negative charged biopolymers (e.g., KG, SA, GE and XG) treated clay decreased firstly following increased, while AG and CH had limit effect on soil consistency. In addition, the trend of plasticity index was similar to liquid limit altering the USCS classification of biopolymer treated clay as silt or clay. Moreover, empirical equations determining undrained shear strength and shear viscosity of biopolymer-treated clay were also established.
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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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