S.M.Engineering Works

• Specification: Point Load Index tester, a rock testing instrument for determining the Diametrical Point Load Strength Index of rock cores and Irregular Lumps which may be tested without any treatment. The Point Load Test is primarily as index Test for strength classified of rock materials. This instrument is mainly intended for field measurements on rocks specimen, but it can be used in the laboratory. The results of the test may also be used to predict the uniaxial compressive strength of rock from correlations. The apparatus is light and portable and can be used in the laboratory as well as in the field

Features:

• Equipment is light and portable
• Rock core specimens can be tested without any preparation
• The instrument can be used in the laboratory as well as at the drilling site
• The results of the test may also be used to predict the uniaxial compressive strength of rock.
• With this instrument, a wide range of core size can be tested
• The frame has adequate adjustments to align perfectly the loading axis passing through the centre of the bearing plates and loading platens at the position of the ram of the hydraulic jack

The equipment comprised the followings:

• Loading Frame, fitted with Hydraulic Jack, hand operated, capacity 100 KN
• Load Gauge, 25KN (2,500 kgf) to read upto 0.25KN (25kgf)
• Load Gauge, 100KN (10,000 kgf) to read upto 0.50KN (50kgf)
• Conical Loading Platens.
• Diaphragm Bolt.

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Standards: ASTM D 4644

Specification: This test method has been developed to assess the deterioration of rocks over a period of time when subjected to water immersion. 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. Samples are alternately tumbled in mesh drums through a water medium and oven-dried for two cycles. The percent loss of mass is referred to as the slake durability index. slake durability apparatus consists of a motorized 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 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.