ORIGINAL PAPER Investigation of Abrasion and Impact Resistance of Aggregates in Different Environments in Direh, Kermanshah, Iran Kazem Bahrami . Seyed Mahmoud Fatemi Aghda . Ali Noorzad . Mehdi Talkhablou Received: 25 January 2018 / Accepted: 8 November 2018 Ó Springer Nature Switzerland AG 2018 Abstract The abrasion and impact resistance of aggregates are important factors that should be taken into consideration during the production of concrete or asphalt that are subjected to abrasion and impact. The aim of this study was to examine the relationship between abrasion and impact resis- tance of aggregates related to the rivers, alluvial fans and taluses. In order to achieve this purpose, samples were collected from 3 rivers, 12 alluvial fans and 2 taluses located in Direh in Kermanshah province, Iran. The samples were studied in terms of changes in void ratio, cracks and weight loss induced by abrasion and impact. The lowest amount of weight loss due to abrasion and impact was observed in aggregates from rivers, with about 30% weight loss due to abrasion and 15% due to impact. The highest amount of weight loss was found among aggregates collected from taluses (45% for abrasion and 35% for impact). This results can be attributed to the degree of cracks and porosity in aggregates. It was also observed that the abrasion and impact resistance of aggregates in alluvial fans was dependent on the morphometric properties of alluvial fans catchment. Thus, a lower amount of weight loss caused by abrasion and impact was in aggregates taken from alluvial fans with larger catchments and longer main channel catchments. Keywords Aggregate Á Abrasion resistance Á Impact resistance Á Alluvial fan Á River Á Talus 1 Introduction Aggregates characteristics play an important role in the resistance and durability of concrete (Fookes 1980; Smith and Collis 2001). One of the main features of aggregates is their abrasion and impact resistances. Aggregates should be hard enough to resist scratches and abrasion (Gangopadhyay 2013). Aggregates abra- sion resistance is even more important in roads with heavy traffic. Their low abrasion resistance may induce problems during the construction process and/or while the completed project is used (Wu et al. 1998; Kosmatka and Wilson 2016). Aggregate abra- sion occurs on road surface because of moving cars. As the degree of aggregates abrasion increases with time, skid resistance lose their functionality (Wilson 2006). Actually, aggregates lose their angularity and roughness in the process of road surface abrasion, and in the process reduce skid resistance on the road surface (Chen and Wang 2011; Kane et al. 2013). It is also a function of aggregate hardness, the proportion K. Bahrami Á S. M. Fatemi Aghda (&) Á M. Talkhablou Faculty of Geology, Kharazmi University, Tehran, Iran e-mail: fatemi@khu.ac.ir A. Noorzad Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran 123 Geotech Geol Eng https://doi.org/10.1007/s10706-018-0741-2