Specification:

• The slake durability apparatus consists of a motorised drive unit which is mounted on a baseplate and which can rotate two or four drums at a speed of 20 r.p.m.
• The percent loss of mass is referred to as the slake durability index.
• The tank assemblies are filled with water to a level 20mm below the drum axis.
• The test drums are manufactured from 2.00 mm mesh, 140 mm dia. X 100 mm long.
• Samples are alternately tumbled in mesh drums through a water medium and oven-dried for two cycles.
• Slake durability is a simulated weathering test to determine abrasion resistance during wetting and drying cycles of shale and similar soft rocks as used in embankments and other construction-related applications.