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E31.2 E32.2

Resonance Modulus Tester (RT-1)

concrete modulus, concrete properties, concrete modulus of elasticity, concrete youngs modulus, rock measurementThe Resonant Tester (RT-1) is a simple, rugged, battery powered unit designed for easy, fast, and reliable operation to find;  Young’s modulus, shear modulus and Poisson’s ratio of concrete, rock, masonry, carbon and other cylindrical (inc. cores), or beam specimens, as well as the dynamic properties for freeze-thaw durability. Consisting of three simple components, this digitally based handheld RT-1 tester is faster, simpler, easier and more economical than older analogue vibrator technology.

Applications

The Olson Instruments Resonant tester is a complete unit designed primarily to conduct and supplement ASTM C215 “Standard Test Method for Fundamental Transverse, Longitudinal, and Torsional Resonant Frequencies of Concrete Specimens” and ASTM C666 “Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing” respectively.

It meets the stringent guidance of these standards. The dynamic Young’s modulus, shear modulus and Poisson’s ratio of concrete, rock, masonry, carbon and other cylinder, beam and core-shaped specimens can be obtained in seconds and used by Structural Engineers in the design of concrete structures as well as the specifications for mix design.

Key Features

  • Simple Components:
  1. Handheld, battery-powered digital analysis and display unit
  2. Accelerometer
  3. Ball peen Hammer

concrete modulus, concrete properties, concrete modulus of elasticity, concrete youngs modulus, rock measurement

 The image above shows the Data Acquisition Unit, a Accelerometer and a Ball-Peen Hammer.

  • Get accurate results in under a minute
  • Colour Screen for Frequency Spectral Display
  • Learning curve: less than 10 minutes
  • Damping Calculation
  • Download & Analyse Data to Your PC via Serial Port
  • AC (100-240 VAC) or Rechargeable Battery Power
  • Option for Testing Smaller Rock Core Specimens
  • Quick & Easy Set Up: uses sponge rubber mat instead of metal test frame (per ASTM C215)
  • Includes sample Excel Spreadsheet for all moduli calculations

Data Collection

A series of three tests must be taken longitudinal, transverse and torsional arrangements. The accelerometer is simply mounted to the test specimen by glue or grease and is then placed on the rubber pad. Then the unit is turned on and the specimen is then struck with the hammer and the results are recorded and saved for analysis.

concrete modulus, concrete properties, concrete modulus of elasticity, concrete youngs modulus, rock measurement

Form Supplied

The Resonant Test kit (RT-1) includes three main components:  a small hammer to impact the concrete specimen, an accelerometer to measure the vibration response of the concrete specimen, and a handheld data acquisition unit which includes a processor to perform calculations as well as a graphical display of the received signal spectrum allowing the user to immediately review test data as well as save, recall, and later download the data to a PC. Additional equipment in the RT-1 test kit includes all necessary cables, sensor mounting brackets and adhesives, and a rubber pad for specimen support.

concrete modulus, concrete properties, concrete modulus of elasticity, concrete youngs modulus, rock measurement

  1. Handheld Data Acquisition & Display Unit
  2. Accelerometer
  3. Microdot BNC Cable (for accelerometer)
  4. 110g Spherical Head Hammer
  5. Adhesive Grease/Spatula
  6. Equipment Case including:
  • Sponge Rubber Mat for Specimen Support
  • Various Accelerometer Mounting Brackets
  • Small Impactor for Rock Cores - Sample Spreadsheet with all Modulus Calculation Pre-Entered
  • Software for data download to PC Serial Port and Data Analysis
  • The RT-1 test kit also includes a CD with an Excel spreadsheet programmed with all calculations and tables found in ASTM C215.

Specifications

 Frequency Resolution 52 Hz
 Maximum Number of Tests Stored 100
 Nyquist Frequency 26,000 Hz
 ASTM C215 Minimum Required Frequency 20,000 Hz
 Processing Time for 1 Test Approx. 10s
 Battery Run Time Approx. 6 Hrs
 Battery Recharge Time (can operate while charging) 6 Hrs
 Accelerometer Flat Frequency Response Measurement Range 20,000 Hz
 High Accelerometer Resonant Frequency for Small Rock Cores 70,000 Hz
 High Nyquest Frequency Option for Small Rock Cores 54,000 Hz

 

VIC:

Melbourne

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t (03) 9938 3830

f (03) 9938 3899

m 0428 315 502

NSW:

Sydney

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t (02) 9986 1857

m 0418 381 709

QLD:

Brisbane

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t (07) 3040 6166

m 0419 477 715

 

WA:

Perth (Head Office)

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t (08) 9322 4020

m 0408 034 668

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