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材料导报  2026, Vol. 40 Issue (9): 25030066-9    https://doi.org/10.11896/cldb.25030066
  无机非金属及其复合材料 |
黄原胶改良EICP加固岩屑复合土强度特性及微观机理
杨悦舒1,2,4, 郑凯1,2,4, 杨奇3, 杨超1,2, 肖海1,2,4, 吴剑1,2, 周明涛1,2,4, 夏振尧1,2,4, 许文年1,2,4, 刘大翔1,2,4,*
1 三峡库区地质灾害教育部重点实验室(三峡大学),湖北 宜昌 443000
2 防灾减灾湖北省重点实验室(三峡大学),湖北 宜昌 443000
3 中国电建集团贵阳勘测设计研究院有限公司,贵阳 550081
4 水泥基生态修复技术湖北省工程研究中心(三峡大学),湖北 宜昌 443000
Mechanical Properties and Micro-mechanisms of EICP Reinforced CompositeSoil with Rock Fragments Modified by Xanthan Gum
YANG Yueshu1,2,4, ZHENG Kai1,2,4, YANG Qi3, YANG Chao1,2, XIAO Hai1,2,4, WU Jian1,2, ZHOU Mingtao1,2,4, XIA Zhenyao1,2,4, XU Wennian1,2,4, LIU Daxiang1,2,4,*
1 Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443000, Hubei, China
2 Hubei Key Laboratory of Disaster Prevention and Mitigation (China Three Gorges University), Yichang 443000, Hubei, China
3 Power China Guiyang Engineering Corporation Limited, Guiyang 550081, China
4 Hubei Provincial Engineering Research Center of Slope Habitat Construction Technique Using Cement-based Materials (China Three Gorges University), Yichang 443000, Hubei, China
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摘要 风化作用强烈的边坡岩屑资源丰富却长期难以消纳利用,如何将岩屑就地消纳与边坡岩土-生态治理措施进行有机结合至关重要。本工作通过黄原胶改良酶诱导碳酸钙沉淀(EICP)技术,开展不同岩屑粒径、岩屑掺量以及不同黄原胶掺量的岩屑基植生基质的固化试验;结合核磁共振(NMR)以及扫描电镜(SEM)等手段,探究了黄原胶改良EICP加固岩屑复合土的微观机理。结果表明黄原胶的掺入使EICP对岩屑复合土的固化效果得到明显提高,黄原胶掺量的增加显著提高了试样的延性。此外,黄原胶增加了EICP胶结液在试样中的滞留时间,同时改变了碳酸钙的分布格局;在1%掺量时,其羧基、羟基与黏土表面阳离子通过离子键和氢键作用形成稳定的黄原胶-黏土颗粒团聚体,为EICP反应提供了更多的成核位点,颗粒间有效碳酸钙含量显著增加;在5%掺量时,团聚体尺寸增加导致颗粒间距增大,中孔和大孔比例上升,试样的孔隙分布不均降低了整体稳定性,同时生成的碳酸钙更多地附着于团聚体的表面,颗粒间的有效碳酸钙含量减少,导致试样强度下降。考虑岩屑基植生基质的强度需求,建议黄原胶掺量控制在1%～3%之间。
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杨悦舒
郑凯
杨奇
杨超
肖海
吴剑
周明涛
夏振尧
许文年
刘大翔
关键词:  酶诱导碳酸钙沉淀(EICP)  植生基质  黄原胶  岩屑  孔隙结构  无侧限抗压强度    
Abstract: Around the strongly weathered rock slopes, rock fragments resources are abundant but difficult to utilize. How to organically combine local consumption of the rock fragments with geotechnical-ecological cooperative protection for the slope is a subject worthy of attention. Based on the enzyme-induced calcium carbonate precipitation (EICP) technology modified by xanthan gum, the solidification tests of rock-fragment-based vegetation substrate with different xanthan gum dosages, rock fragments particle sizes and dosages were conducted. Combined with nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM) analysis, the micro-mechanism of EICP reinforced composite soil with rock fragments modified by xanthan gum was explored. The results showed the reinforcement effect of EICP on the composite soil was significantly improved by the addition of xanthan gum, and an obvious improvement for soil ductility was also observed with the increase of xanthan gum dosages. Moreover, the xanthan gum extends the residence time of EICP reaction solutions that alters the calcium carbonate distribution pattern in the samples. When xanthan gum dosage was 1%, the stable xanthan gum-clay particle aggregates are formed due to the connection between carboxyl or hydroxyl groups of the xanthan gum and the ionic or hydrogen on the clay particle surface, which can provide more nucleation sites for the EICP reaction, thereby increasing the effective calcium carbonate among soil particles. However, the size of the xanthan gum-clay particle aggregates is too large to have a positive effect when xanthan gum dosage is 5%, which results in increasing the spacing between soil particles and the proportions of mesopore and macropore. Then the soil stability is reduced by the uneven pore distribution, and the effective calcium carbonate among soil particles is suppressed due to more calcium carbonate being formed on the surface of aggregates; thereby, the strength of composite soil decreases. Therefore, the suitable dosage of xanthan gum is 1%—3%, which can meet the strength requirement of rock-fragment-based vegetation substrate.
Key words:  enzyme-induced calcium carbonate precipitation (EICP)    vegetation substrate    xanthan gum    rock fragments    pore structure    unconfined compressive strength
收稿日期:  2026-05-10      出版日期:  2026-05-10      发布日期:  2026-05-18
ZTFLH:  TU411  
基金资助: 湖北省教育厅科技项目(D20241207);国家自然科学基金(52378351);宜昌市自然科学基金(A25-3-008);三峡库区地质灾害教育部重点实验室(三峡大学)开放研究基金(2024KDZ07);防灾减灾湖北省重点实验室(三峡大学)开放研究基金(2023KJZ11)
通讯作者:  *刘大翔,三峡大学土木与建筑学院副教授、博士研究生导师。主要从事边坡生态防护方面的研究。ldx@ctgu.edu.cn   
作者简介:  杨悦舒,三峡大学土木与建筑学院副教授、博士研究生导师。主要从事生物岩土工程方面的研究工作。
引用本文:    
杨悦舒, 郑凯, 杨奇, 杨超, 肖海, 吴剑, 周明涛, 夏振尧, 许文年, 刘大翔. 黄原胶改良EICP加固岩屑复合土强度特性及微观机理[J]. 材料导报, 2026, 40(9): 25030066-9.
YANG Yueshu, ZHENG Kai, YANG Qi, YANG Chao, XIAO Hai, WU Jian, ZHOU Mingtao, XIA Zhenyao, XU Wennian, LIU Daxiang. Mechanical Properties and Micro-mechanisms of EICP Reinforced CompositeSoil with Rock Fragments Modified by Xanthan Gum. Materials Reports, 2026, 40(9): 25030066-9.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.25030066  或          https://www.mater-rep.com/CN/Y2026/V40/I9/25030066
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