On geotechnical properties of a lime-stabilized soft clay soil in Northern Quebec under freeze-thaw conditions

冻融条件下魁北克北部石灰稳定软粘土的岩土特性

• 批准号: 541431-2019
• 负责人: Li, Biao
• 金额: $ 1.82万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680978
• 关键词: geotechnical; properties; lime; stabilized; soft; geotechnical; properties; lime; stabilized; soft

Infrastructure development in the growing community of Waskaganish, Quebec has produced an excess quantity of excavated clay. As Waskaganish continues to develop, the issue of clay accumulation and its management is expected to remain for at least the next 20 years. Our collaboration industry partner BluMetric Environmental Inc. is proposing a sustainable value-added strategy that reinforce the soft clay structure using lime-stabilized approach to form a processed granular material suitable for civil and infrastructure work (no need to excavate/stockpile the clay). In warm countries, lime stabilization is used without problems; but in cold regions like Waskaganish, Quebec, some concerns are still present in relation to behavior of lime-stabilized soils at low temperatures, particularly in conditions of freezing and thawing. In this research project, we plan to conduct laboratory tests on lime-stabilized soft clay soils retrieved from Waskaganish area, Northern Quebec to study the impact of freeze and thaw cycles on geotechnical properties of lime-stabilized soils with different lime/clay ratios. The success completion of this project will directly provide a guidance on the optimum lime/clay ratio determination for BluMetric's project at Waskaganish. If the tests are conclusive, the lime treatment of clay could reduce the use of granular resources which are limited in this region of Quebec and reduce the adverse environmental effects of stockpiling clay.

魁北克不断增长的瓦斯卡尼什人社区的基础设施发展产生了过量的挖掘粘土。随着Waskaganish的继续发展，粘土积累及其管理的问题至少将在未来20年内保持。我们的合作行业合作伙伴Blumetric Environmental Inc.正在提出一种可持续的增值策略，该战略使用石灰稳定的方法来增强软粘土结构，以形成适合民用和基础设施工作的处理过的颗粒材料（无需挖掘/储存粘土）。在温暖的国家，使用石灰稳定没有问题。但是，在魁北克瓦斯卡加尼什人等寒冷地区，仍然存​​在一些关注点在低温下，尤其是在冷冻和融化的条件下，仍然存在与石灰稳定的土壤的行为有关。在该研究项目中，我们计划对从魁北克北部瓦斯卡加尼什地区检索到的石灰稳定的软粘土土壤进行实验室测试，以研究冻结和融化周期对具有不同石灰/粘土比的石灰稳定土壤岩石稳定土壤的岩土技术特性的影响。该项目的成功完成将直接提供有关Blumetric在Waskaganish项目的最佳石灰/粘土比确定的指导。如果测试是结论性的，则粘土的石灰处理可以减少在魁北克这个地区受到限制的颗粒资源的使用，并减少库存粘土的不利环境影响。