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首页> 外文期刊>Journal of Cleaner Production >Enhanced mechanical properties and durability of coal gangue reinforced cement-soil mixture for foundation treatments
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Enhanced mechanical properties and durability of coal gangue reinforced cement-soil mixture for foundation treatments

机译：用于基础处理的煤石增强水泥-土壤混合物的机械性能和耐久性得到增强

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摘要

High-speed railways with high load capacity and long-term performance have been developed by the aid of high-performance construction materials for foundation treatments. The mechanical properties and durability of new cement-soil mixture reinforced by local sourced waste coal gangue aggregate were investigated in this study. Extensive experiments were carried out to analyse the effects of coal gangue on compressive strength, elastic modulus, stress-strain curve and anti-corrosion of cement-soil mixture. The results show that incorporation of coal gangue significantly improve the strength, stiffness and anti-corrosion ability of cement-soil mixture. Strength improvements up to 81.8% was achieved, but the ductile failure model shited to brittle failure with more than 42% coal gangue reinforcements. Except for the declining segment of the stress-strain curve, the ascending segment of the stress-strain curve can be fitted by the existing models. From the microstructural characterization, coal gangue can reduce acid solution permeation compared to the soil. For the cemented soil with coal gangue, the mass-loss rates only reach 4-7% after 140 days acid solution immersion. Therefore, this new clean production of high-performance cement-soil mixture through waste coal gangue reinforcement has great potential for railway foundation treatments. (C) 2019 Elsevier Ltd. All rights reserved.
机译：借助于用于基础处理的高性能建筑材料，已经开发了具有高承载能力和长期性能的高速铁路。研究了当地废煤石骨料增强的新型水泥土混合物的力学性能和耐久性。进行了广泛的实验，分析了煤石对水泥土混合物抗压强度，弹性模量，应力-应变曲线和防腐性能的影响。结果表明，掺入煤石可以显着提高水泥土混合料的强度，刚度和抗腐蚀能力。强度提高到81.8％，但是延性破坏模型通过使用超过42％的煤gang石补强剂将其转变为脆性破坏。除了应力-应变曲线的下降段外，现有模型都可以拟合应力-应变曲线的上升段。从微观结构特征来看，煤the石与土壤相比可以减少酸溶液的渗透。对于带有煤石的胶结土壤，酸溶液浸泡140天后，其质量损失率仅达到4-7％。因此，这种通过废煤石加固的新型清洁生产高性能水泥土混合物具有很大的潜力可用于铁路地基处理。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Journal of Cleaner Production》 |2019年第10期|468-482|共15页
  • 作者

    Long Guangcheng; Li Linhao; Li Wengui; Ma Kunlin; Dong Wenkui; Bai Chaoneng; Zhou John L.;

  • 作者单位

    Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China|Univ Sydney Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;

    Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China|Univ Sydney Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;

    Univ Sydney Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;

    Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China;

    Univ Sydney Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;

    Xian Railway Survey & Design Inst Co Ltd, Xian 710054, Shaanxi, Peoples R China;

    Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China|Univ Sydney Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Cement-soil mixture; Coal gangue; Mechanical properties; Elastic modulus; Durability; Microstructure;

    机译：水泥土混合料;煤gang石;力学性能;弹性模量;耐久性;显微组织;

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