Rockschmidt Hammer

RockSchmidt is the most advanced rebound hammer used for measuring hardness, strength, and uniformity testing of rock formations for the evaluation of geological properties.

The RockSchmidt hammer finds application, especially in rock testing applications and penetration rate prediction for tunnel boring machines and rotary drum cutters.

Additional geological applications include study of the Correlation to unconfined compressive strength of rock / Estimation of weathering grade / Estimation of modulus of elasticity of rock.

The ISRM & ASTM D 5873, both guidelines have been applied in RockSchmidt hammer for the procedure to determine the rebound number.

The ASTM D 5873 method requires 10 impacts from which a mean is calculated. Individual impacts that differ by more than ±7 from the calculated mean are discarded and a new mean is calculated from the remaining values.

Whereas, in ISRM method 20 readings are required with no deletion of outliers. A series may be terminated prematurely if any 10 subsequent readings differ by ±2. On completion of 20 readings the Rock Schmidt calculates the mean and the range.

When performing rebound hammer test on rock or core samples, both ASTM and ISRM methods recommend the use of a heavy specimen holder to prevent damage to the cores on impact.

The Proceq Rebound Hammer has impact angle independence feature; thus, rebound value is independent of impact direction.

The Rock Schmidt Type N has the standardized impact energy of 2.207 Nm. It is ideally suited for field testing.

The Rock Schmidt Type L with impact energy 0.735 Nm is more suited to testing on cores.

Rebound rockschmidt hammers have historically been used for many rock testing applications. Such as:

• Geomorphological applications which investigate the bulk hardness properties of a rock

outcrop.

• Prediction of weathering grades

• Correlation to Unconfined (or Uniaxial) Compressive Strength (UCS)

• Correlation to Young’s Modulus

• Prediction of penetration rates for tunnel boring machines and rotary drum cutters.

• Testing on cores and blocks

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Features

Impact Angle Independence: The rebound value is independent of the impact direction.
Optimized for Field Work: Dirt and dust intrusion protected for longer life, significantly lighter and more ergonomic, Ease of data storage & reporting make it the best choice for field work.
Preset Statistics: Statistics methods recommended by ISRM and ASTM are implemented into the hammer allow automatic calculation of the rebound number.
Unconfined Compressive Strength Test: The RockSchmidt hammer allow unconfined compressive strength (UCS) test.
Young’s (E-) Modulus: ISRM recommends a correlation between elastic modulus and the rebound value based on the formula Et = cedR (where R is the rebound value), A correlation in this format may be defined in the software and downloaded onto the Rock Schmidt.
Weathering Grade: Impacting on the same location twice can be used to correlate to weathering grade. The ISRM recommended method has been included in the device.

Specification

Impact energy	(N) 2.207 Nm, (L) 0.735 Nm
Dimensions of housing	55 x 55 x 250 mm (2.16” x 2.16” x 9.84”)
Weight	570 g
Max. impacts per series	99
Memory capacity	Dependent on length of test series Example: 400 series of 10 impacts
Display	17 x 71 pixel, graphic
Battery lifetime	> 5000 impacts between charges
Operating temperature	0 to 50°C (32 to 122°F)
IP Classification	IP54

FAQ

Do you have a question which we can answer for you? Click here if Yes

What is the weight of the instrument?

570g
Can user export the output data?

Yes, Rocklink software allows data storage & report generation.
How long is the battery life of the instrument?

The hammer allows upto 5000 impacts between charges.
What is the operating temperature range?

0° to 50°C
What is impact energy of the instrument?

The Rockschmidt hammer type N has 2.207 Nm & type L has 0.735 Nm impact energy.

Downloads

Title	File Type	File Size	Downloads	View	Last Uploaded
Product Datasheet	application/pdf	924.85 KB			June 21 2022 16:41:44

Rockschmidt Hammer

Rockschmidt Hammer

What is the weight of the instrument?

Can user export the output data?

How long is the battery life of the instrument?

What is the operating temperature range?

What is impact energy of the instrument?

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Privacy Disclaimer:
We will only publish your first name. Your Last name will not published to maintain your privacy. Your mobile no will not be revealed or published to maintain your privacy. It will only be maintained in our database. You may receive product or information updates from time to time on WhatsApp. Your email ID will not be revealed or published to maintain your privacy. It will only be maintained in our database. You may receive product or information updates from time to time on email. Should you post your question, it is assumed that you agree to the above.