نوع مقاله : مقاله پژوهشی
1 دانشجوی دکتری زمین شناسی مهندسی، دانشگاه فردوسی مشهد،
2 دانشگاه فردوسی مشهد
3 استاد یار زمین شناسی مهندسی، دانشگاه تهران
4 کارشناسی ارشد زمین شناسی مهندسی، دانش آموخته دانشگاه تهران
عنوان مقاله [English]
The adhesion of clay minerals to metal surfaces leads to clogging of equipment during mechanized tunneling through clay-bearing formations. Among proposed methods to measure adhesion and evaluate clogging potential, Piston Separation Device is found practical and capable to be developed. The Device was designed based on literature and built in this study. Performance of test device was investigated by natural and synthetic materials (water, honey, stick and clayey soil). Statistical study confirmed accuracy and reproducibility of test results. Study of wetness effect in adhesion of Montmorillonite showed adhesion increases with decrease in moisture to twice as much Plasticity Limit (w=2PL). Also it is perceived that clogging will occur in wetness much than twice as much Plasticity Limit but in less not.