|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
Progressive modification of quartz sand under freeze-thaw weathering: Identification of critical particle sizeстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 марта 2026 г.
- Авторы: Qi Liu, Ze Zhang, Xu Chunguang, Qingkai Yan, Zhiyuan Wang, Yaqi Zhang, Andrei Zhang, Nikolai Torgovkin
- Журнал: Engineering Geology
- Том: 364
- Год издания: 2026
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 108598
- DOI: 10.1016/j.enggeo.2026.108598
- Аннотация: Freeze–thaw cycles (FTCs) profoundly influence the mechanical stability of sandy soils in cold regions, yet the micro-mechanisms governing their grain size and morphology evolution remain insufficiently understood. This study investigates the fragmentation and morphological evolution of quartz sand subjected to 1000 FTCs. The results reveal that freeze–thaw action drives a progressive ‘coarsening-to-fining’ shift in grain size distribution. This transition reaches stage-specific dynamic equilibria through successive particle breakage and abrasion. Morphologically, angular particles undergo selective edge abrasion, exhibiting a progressive transition from angular to structurally regular geometries. We identify a critical particle size for freeze-thaw weathering of quartz that lies within the coarse silt range (0.01–0.05 mm). The fining process reflects a gradual reduction of lattice defects until particles reach a stable size with enhanced resistance to breakage. These findings systematically elucidate the particle fragmentation supply behavior of quartz sand under freeze-thaw weathering and provide a microstructural basis for improving predictive models of freeze-thaw related geohazards in cold regions.
- Добавил в систему: Чжан Андрей Антонович