Utilization of Metakaolin-Based Geopolymers for Stabilization of Sulfate-Rich Expansive Soils
Utilization of Metakaolin-Based Geopolymers for Stabilization of Sulfate-Rich Expansive Soils
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DOI：
10.1061/9780784484012.023
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Jungyeon Jang;A. Puppala;Nripojyoti Biswas;Sayantan Chakraborty;M. Radovic
中科院分区：
文献类型：
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作者：
Jungyeon Jang;A. Puppala;Nripojyoti Biswas;Sayantan Chakraborty;M. Radovic
由于水分引起的体积波动，在膨胀土上建造的路面和其他轻质结构的耐久性和性能一直受到关注。通常，传统的钙（Ca）基稳定剂，尤其是石灰，通过降低其溶胀-收缩潜力和改善其强度性质，有效地减轻与这些问题污垢相关的问题。然而，使用钙基稳定剂处理富含硫酸盐的膨胀土由于形成高度有害的矿物钙矾石而导致有害的隆起。本研究旨在探讨利用一种生态友好的偏高岭土基地质聚合物（MKG）稳定剂处理富硫酸盐膨胀土的效果。通过对未处理、石灰处理的水泥土进行自由膨胀试验和无侧限抗压强度试验，
The durability and performance of pavements and other lightweight structures constructed over expansive soils are persistent causes of concern due to moisture-induced volumetric fluctuations. Typically, traditional calcium (Ca)-based stabilizers, especially lime, effectively mitigate the problems associated with such problematic soils by reducing their swell-shrink potential and improving their strength properties. However, the treatment of sulfate-rich expansive soils using the Ca-based stabilizers results in detrimental heave due to the formation of a highly deleterious mineral, ettringite. This research study was performed to investigate the efficacy of utilizing an eco-friendly metakaolin-based geopolymer (MKG) stabilizer for treating sulfate-rich expansive soils. A comparative study was conducted by performing engineering tests such as free swell tests and unconfined compressive strength (UCS) tests on untreated, lime-treated