Effect of water saturation on Cerchar abrasivity index (CAI) of clay-rich rocks at different scratch lengths

Basit Öğe Kaydı
dc.authoridComakli, Ramazan/0000-0001-7392-6275
dc.contributor.authorComakli, Ramazan
dc.contributor.authorAldalahali, Abdullah Mhmood Jumah
dc.date.accessioned2024-11-07T13:24:25Z
dc.date.available2024-11-07T13:24:25Z
dc.date.issued2024
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractPredicting the cutter consumption rate of mechanical excavators using the Cerchar abrasivity index (CAI) results is possible. However, changing operational parameters in the field may cause differences between the estimated cutter consumption rate based on CAI test results and the real cutter consumption rate observed in the field. One of the essential parameters in the field that affects the cutter consumption rate is the increase in the water content of the excavated rocks. In theory, an increase in the water content of rocks is expected to reduce their abrasivity. In addition, the prediction of cutter consumption rate is based solely on CAI test results conducted on dry surfaces. However, especially during the excavation of low-strength clay-rich rocks, the excavated rock material can adhere to the cutters and block them, leading to a higher cutter consumption rate than initially predicted. This study aims to analyze the rock-pin interaction in CAI tests conducted on wet surfaces of clay-rich rocks and investigate the effect of water saturation on CAI at different scratch lengths. CAI tests were conducted on dry and wet surfaces of 20 clay-rich rocks with low strength at 10, 30, 50, and 70 mm scratch lengths, respectively. The relationships between the CAI test results obtained on dry and saturated rock surfaces were statistically analyzed for each scratch length. A positive linear correlation was found between CAI values obtained on dry (CAIDry) and saturated surfaces (CAISat) at each scratch length. The percentage variations in CAI values at each scratch length were analyzed in detail. It was found that 90 % of samples have higher CAIDry than CAISat at 10 mm scratch length. However, it was observed that as the scratch length increased, the relationship between the CAI values obtained in dry and saturated conditions changed, and the proportion of samples with CAIDry higher than CAISat decreased to 65 %, 55 %, and 25 % at scratch lengths of 30 mm, 50 mm, and 70 mm, respectively. In CAI tests conducted on saturated surfaces, it was observed that the excavated rock material adhered to the test pins, and as the scratch length increased, the increase in CAISat values was considered to be due to this situation. This study revealed the importance of considering the adhesion potential of rocks to cutters at water-saturated conditions for the accurate prediction of cutter consumption in the excavation of clay-rich rocks.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [120M145]; TUBITAK
dc.description.sponsorshipA part of this study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK 120M145) . The authors are grateful for the support of TUBITAK.
dc.identifier.doi10.1016/j.wear.2023.205187
dc.identifier.issn0043-1648
dc.identifier.issn1873-2577
dc.identifier.scopus2-s2.0-85178553151
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.wear.2023.205187
dc.identifier.urihttps://hdl.handle.net/11480/14100
dc.identifier.volume538
dc.identifier.wosWOS:001131546300001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Sa
dc.relation.ispartofWear
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectCerchar abrasivity index
dc.subjectMechanical excavation
dc.subjectClay-rich rocks
dc.subjectWater saturation
dc.titleEffect of water saturation on Cerchar abrasivity index (CAI) of clay-rich rocks at different scratch lengths
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu