Resonance Modulus Tester

Reonsance Modulus Tester (RT-1)

The 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 analog 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:

Handheld, battery-powered digital analysis and display unit
Accelerometer
Ball peen Hammer

Get accurate results in under a minute
Color Screen for Frequency Spectral Display
Learning curve: less than 10 minutes
Damping Calculation
Download & Analyze 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.

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.

Handheld Data Acquisition & Display Unit
Accelerometer
Microdot BNC Cable (for accelerometer)
110g Spherical Head Hammer
Adhesive Grease/Spatula
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

Additional Information

To download any of the documents simply either click on them, or right click and choose 'Save As'. To view these documents you will need the the free Adobe Viewer which can be downloaded from the link at the bottom of the page.