Physico-Mechanical Investigation of Amphibolite and Fine Materials from Kaiigah Upper Kohistan, Khyber Pakhtunkhwa, Pakistan: Implications for Potential Aggregate Analysis

Properties of Amphibolite in KPK

Abstract

A study was carried out to evaluate the physical and mechanical properties of amphibolite located in the Kaiigah region of the upper Kohistan Dasu Dam area. The study aimed to explore its suitability as a source for aggregates and to evaluate its geotechnical performance. The region is mainly composed of amphibolite. The assessment included a comparison of physical properties against recognized standards to gauge their suitability for construction use. It was found that there is a strong direct correlation between water absorption rates and Los Angeles abrasion results. The analysis covered both fine and coarse aggregates, examining parameters such as specific gravity, Los Angeles abrasion, unit weight, sieve analysis, Proctor compaction, Atterberg limits and sand equivalent, in accordance with ASTM and British Standards. The findings were cross-referenced with ASTM and AASHTO standards to gauge aggregate quality. It was concluded that the amphibolites from Kaiigah meet the necessary criteria for specific gravity and Los Angeles abrasion, indicating their suitability for the local construction   sector.