Linked In YouTube Google Plus
E31.2 E32.2

Rock Unconfined Compressive Strength (UCS) using non-Destructive Hardness Measurements

RockSchmidt for Rock UCS

Schmidt hammers are used internationally for testing of rocks as well as concrete/cementitious material.  ASTM D5873 (Rock) has been developed as a standard for this form of testing. Generally an L Type Test Hammers is used.  Conversion to rock strength (UCS) also rely on the mineralogy of the rock in question.  Many conversion curves exist and can be loaded into the RockSchmidt for UCS conversion on site. Schmidt Hammers lend themselves to grading rock core in the lab and testing rocks in the field.

See here for information on the product...

Equotip for Rock UCS

Equotip 3 for Rock Testing with probe and display The Equotip 3 provides the user with a highly portable, accurate tool to test rock hardness. The instantaneous results can be stored and saved on the indicating device. Whilst designed and used to determine the hardness of metal a new application in determining the compressive strength rock (UCS) and logging rock core sample has been researched. This allows the Equotip to be used as a rock strength testing machine without destroying sample (ie non-destructively)

Equipment

The Equotip 3 consists on the Impact device and the control/logging box. Seen below the impact device consists of a 3mm dia. Spherical shaped tungsten carbide test tip which is spring mounted in an impact body. The test tip impacts on the test surface under spring force from which it rebounds.

The velocity that the impact body is impelled and rebounds with is measured by the passing of a permanent magnet through a coil of wire. This induces a voltage proportional to the devices velocity.

The LEEB hardness value is the quotient of the impelled velocity over the rebound velocity multiplied by 1000. Harder materials will rebound the impact device giving higher LEEB hardness values.

Rock UCS data v Equotip Hardness MeasurementEquotip 3 vs Equotip 2

  • Automatic correction for the orientation of the probe. A larger screen with backlight
  • Choice to use internally rechargeable batteries or standard “C” Batteries
  • Connection to PC using USB or Ethernet.
  • New and Improved Equolink 3 software has also been introduced.

Ring Supports

Accurate testing using the Equotip 3 relies on the test specimen being immobilized. This can be achieved using a simple test jig firmly connected to a heavy vibration resistant base. Furthermore the Support Ring (part 6) is designed to give a firm connection between the Impact Device and the core. The standard support ring I ideal for cores with radius greater than 60mm and flat surfaces. The Z14.5 to 30 support ring allows testing of cores between 29 and 60mm dia.

Impact Device Type S

The S type impact device uses highly durable material in the test tip in the impact body of the standard D type Impact Device. This improved durability is ideal for core logging because it prolongs the usage of the Impact Device between servicing. 

VIC:

Melbourne

This email address is being protected from spambots. You need JavaScript enabled to view it.

t (03) 9938 3830

f (03) 9938 3899

m 0428 315 502

NSW:

Sydney

e This email address is being protected from spambots. You need JavaScript enabled to view it.

t (02) 9986 1857

m 0418 381 709

QLD:

Brisbane

e This email address is being protected from spambots. You need JavaScript enabled to view it.

t (07) 3040 6166

m 0419 477 715

 

WA:

Perth (Head Office)

e This email address is being protected from spambots. You need JavaScript enabled to view it.

t (08) 9322 4020

m 0408 034 668

Linked In YouTube Google Plus