Abstract:This study focuses on determinate the presence of acid rock drainage (ARD) on two slopes on Route27, Costa Rica, by analysis of paste pH and geochemistry of superficial water. The laboratory results (samples with pH up to 1.5), and the physical evidence observed in the field, shows that in fact there is ARD in some slopes. The ARD on the route is directly affecting the chemical and physical properties of the shotcrete on the slopes, welded steel and ditch for the surface water management, causing its collapse … Show more
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