Gypsum and rice husk ash for sustainable stabilization of forest road subgrade

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL
Ebrahim Sharifi Teshnizi, Mehdi Mirzababaei, Jafar Karimiazar, Reza Arjmandzadeh, Kamran Mahmoudpardabad
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引用次数: 0

Abstract

Forest roads are crucial for economic development and resource accessibility, especially in regions with extensive wood demand driven by construction growth. These roads require consistent maintenance to prevent structural issues, even though they experience lower traffic. Traditionally, gypsum has been used for soil stabilization due to its cation exchange capability with clay minerals and flocculation properties. However, its water solubility in wet conditions necessitates innovative solutions. This study explores a novel approach by combining gypsum with rice husk ash (RHA), an abundant agricultural waste, to address the challenges posed by expansive and low-bearing clay soils in forest road construction. In this study, an expansive soil with high plasticity and swelling potential is treated with varying combinations of RHA (5%-20%) and gypsum (2%-6%), followed by curing for 7, 15, and 30 days. Mechanical property tests revealed reduced plasticity and swelling pressure, alongside increased unconfined compressive strength. Microscopic analysis illustrated the formation of a calcium silicate hydrate (CSH) gel and Calcium Alumino Silicate Hydrate (CAH) gel, which possibly contributes to improved stability. This research underscores the potential of sustainable soil stabilization using gypsum and RHA synergy to fortify forest roads against expansive clay soil challenges, promoting eco-friendly and resilient infrastructure solutions.
石膏和稻壳灰用于森林公路路基的可持续稳定
森林道路对经济发展和资源可及性至关重要,特别是在建筑增长驱动木材需求广泛的地区。这些道路需要持续的维护,以防止结构性问题,即使它们的交通量较少。传统上,石膏由于其与粘土矿物的阳离子交换能力和絮凝性能而被用于土壤稳定。然而,它在潮湿条件下的水溶性需要创新的解决方案。本研究探索了一种将石膏与丰富的农业废弃物稻壳灰(RHA)相结合的新方法,以解决森林道路建设中膨胀和低承载的粘土所带来的挑战。在本研究中,采用RHA(5%-20%)和石膏(2%-6%)的不同组合处理具有高塑性和膨胀潜力的膨胀土,分别养护7天、15天和30天。力学性能测试显示塑性和膨胀压力降低,同时增加无侧限抗压强度。显微分析表明形成了水合硅酸钙(CSH)凝胶和水合硅酸铝钙(CAH)凝胶,这可能有助于提高稳定性。这项研究强调了可持续土壤稳定的潜力,利用石膏和RHA协同作用来加强森林道路抵御膨胀粘土的挑战,促进生态友好和弹性的基础设施解决方案。
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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