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E-920 Clegg Impact Soil Tester 4.5kg

ASTM D5874

The Clegg Impact Soil Tester (CIST) or “Clegg Hammer” is useful for testing the strength, hardness or stiffness of compacted soils with application to compaction control. Now widely used throughout the world, it is also useful for quickly gathering data for monitoring temporal or spatial variations in strength over an area. Engineers are now using the Clegg Impact Soil Tester either in place of or as an adjunct to nuclear testing at far lower cost and greater speed. It has been found to have excellent correlation with CBR and is used over a wide range of materials, preferred due to its ease and portability. There are four models of the Clegg Impact Soil Tester. Model E-920 uses a 4.5 kg mass similar to a heavy laboratory compaction hammer and consists of the mass, hammer handle, accelerometer, guide tube and electronic meter which digitally displays the Clegg Impact Value (CIV). (1 CIV is equivalent to 10 gravities.)

The other available models with hammer weights of 0.5kg (Light), 2.25kg (Medium) and 20kg (Heavy), extend the range to include very soft soils, thin pavements and rockfill material.The Light Hammer is most often used for sports turf hardness testing: natural grass football fields, golf greens, turf horse tracks. All conform to ASTM D5874.
Shipping Weight: 20 lb (9kg); 2 cu. ft.

  E-921   Clegg Light Impact Tester, 0.5kg

  E-922   Clegg Medium Impact Tester, 2.25kg

  E-923   Clegg Heavy Impact Tester, 20kg

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241 S. Frontage Road., Suite 38
Burr Ridge,IL 60527 USA