What is a Clegg Hammer used for?

What is a Clegg Hammer used for?

The Clegg Impact Soil Tester provides a means for measuring and controlling soil strength and consolidation levels during trench re-instatement. It is also used to confirm uniform compaction over wide areas of ground, identifying poorly compacted areas and ineffective rolling of materials.

What is Clegg testing?

The Clegg Impact Soil Tester provides a simple means of testing the design and construction of pavement overlays, subgrades and earthworks and for confirming uniform compaction over wide areas. It is also a valuable tool in checking compaction levels during trench reinstatement after pipe or cable laying.

What is the Clegg?

The Clegg Impact Tester is a professional instrument used to determine hardness on all types of areas – Readings in Gravities (Gmax), CIT’s and F355 Equivalent. New for 2021 – Wireless bluetooth display with GPS enabled tablet, data logging and mapping.

How do you do the Clegg test?

Stand with both feet on the base flange, or rest one foot on the flange whilst steadying the tube with the side of the leg. remove the locking pin that retains the hammer inside the tube and unclip the meter unit. Press the button on the readout and check the display shows zero IV (Impact Value).

What is a traction meter used to measure?

Turf firmness The FieldScout TruFirm is used to measure the firmness of turfgrass and bunker sands. Developed by the USGA, the TruFirm meter was developed to provide championship-calibre playability by managing greens that are consistently firm and fast.

How much is a Clegg Hammer?


Product Details Price
Clegg Basic Soil Impact Tester Clegg Hammer 4.5kg, CIST/882 display, controller with alkaline battery, NZ dated calibration sticker, test ring, NZ test calibration certificate – laminated, user manual and heavy duty transport case. CALL 0800 500 380 FOR LATEST PRICING

What is the Clegg Impact Value?

When the device is dropped un an aggregate or soii surface, the rate at which the hammer slows is related to the strength, density, or hardness of the surface. The electronic meter displays and records the peak deceleration; the higher the Clegg Impact Value (CIV), the firmer the surface is.

How do you Clegg a hammer?

Raise the hammer with one hand until the white indicator ring is level with the top of the guide tube. Make sure the cable is free and will not snag as the hammer falls; then drop the hammer cleanly. Observe the meter reading.

How do you test ground hardness?

Surface and subsurface hardness are measured using a penetrometer, an instrument that measures the soil’s resistance to penetration. It consists of a cone-tip, a metal shaft, and a pressure gauge that measures resistance in psi (Figure 2.18 A).

How do you convert CBR to kPa?

CBR=Su/23 where Su is the undrained shear strength in kPa.

Which hardness test is the most common?

Common hardness testing types include Rockwell (indentation depth or un-recovered indentation), Knoop/Vickers, and Brinell (area of indentation). Rockwell testing is the most commonly used method by virtue of the quick results generated and is typically used on metals and alloys.

Which hardness tester is most widely used?

Rockwell hardness test
The Rockwell hardness test is the most widely used technique, easy to carry out and more precise than other kinds of evaluations. The Brinell hardness test is typically used to evaluate materials that are too coarse or that have an exterior that is too rough for other test techniques.

What is a Clegg impact hammer?

A Clegg Impact Hammer assists with the preparation of quality and consistent playing surfaces in many sports. It can be used to aid decisions relating to playing surface quality and safety, as well as turfgrass health. The Clegg Impact Hammer soil tester is simple to use and produces straightforward and unbiased results.

What is an example of a Clegg hammer reading?

Example: Clegg Impact Values across Suncorp Stadium (for 1 st September 2010). 10 20 30 40 50 60 0 20 40 60 80 100 Trends of 1 st drop Clegg hammer readings from 2006 to 2011, Suncorp Stadium Use in golf turf  The NZ Sports Turf Institute has used a Clegg hammer to gauge putting green firmness for 10 years.

Is there a correlation between the Clegg hammer IV and CBR?

There is a direct correlation between the Clegg Hammer (IV) and CBR, the conversion factor can usually be found in the manufacturers handbook. A search of the internet will usually produce several correlations on soils from different parts of the world, some with slightly different results.

What is the weight of the G-Clegg hammer?

G-CleggHammer: Professional Clegg Hammer 4.5 kg, CIST/883 display. Calibration and transport case included. Clegg Hammer 4.5kg comes with CIST/883 display, controller with alkaline batteries, NZ dated calibration sticker, test ring, NZ test calibration certificate – laminated, user manual and heavy duty transport case.