non-destructive testing

NDTfor all types of applications and environments

Non-destructive testing on reinforced concrete and brickwork structures constitute the first investigation method for verifying the actual conditions of a building or a structure, existing or under construction. As indicated by anti-seismic regulations, these tests can be performed by all authorised operators. The use of these NDT survey methods not only helps minimise the number of specimens to be allocated to direct laboratory analyses, but also helps obtain information extended to the entire structure.

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PACOMETRIC SURVEYS

Rebar mapping is fundamental not only to check the conditions of the structure, but it is essential for the subsequent execution of rebound hammer and ultrasonic surveys (SONREB). Pacometers use the induced current technique (Eddy Currents); that is, they measure the variation of the electromagnetic field induced by the presence of the rebars in reinforced concrete works. From the analysis of the signal intensity, it is possible to define the thickness of the concrete cover with extreme precision and calculate the diameter of the metal rebar in good approximation, without having to drill or perform demolitions of the works. Because of the characteristics of the pacometric method, this type of survey is limited only to the first rebar mesh (maximum depth: 18 cm). 

WHAT YOU NEED

instruments

Profometer

A range of advanced pacometers and rebar locators, based on electromagnetic pulse induction to perform assisted scanning of each surface, regardless of size and geometry. Estimate of the concrete cover with the Artificial Intelligence (AI) function and the on-site concrete cover calibration function.

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Profoscope

Designed for one-handed use, the Profoscope pacometer is a robust, lightweight and compact instrument, features that make it extremely suitable for on-site use. Allows the real-time display of the position of the rebars below the concrete surface.

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GPR RADAR SURVEYS ON STRUCTURES

In order to reconstruct in detail a structure in its entirety, including the 2D/3D geometry of the rebars, radar surveys are the tools that make the difference. Going beyond the limits of the pacometric method (which cannot go beyond the first mesh of the rebar), GPR displays the stratification of multiple levels of rebars and defines the thickness of the structural element, in concrete or brickwork. Any inhomogeneities such as voids, honeycombing and/or material changes can be identified to complete a fast, exhaustive and totally non-invasive investigation.

WHAT YOU NEED

instruments

Proceq GPR live

The new Proceq GPR Live is equipped with advanced S and offers FCW (Stepped Frequency Continuous Wave) technology and delivers the widest frequency spectrum in the market All applications typically addressed with antennas in the range of 0.9 to 3.5 GHz can now be covered with one single device, without having to buy or switch to a different antenna for every testing location. The current GPR solutions on the market, in fact, cover only one frequency that allows scans to be performed only for a specific penetration depth.

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PULL-OFF ADHESION TESTING

Pull-Off tests allow measurement of the tensile strength of a material or the determination of the adhesion resistance between two different materials (typically the adhesion value of mortars and plaster on walls). A metal disk is fixed to the surface of the material to be tested using particular resins. After isolating the test surface by incision made with a core barrel, it is torn off using the instrumented extractor which measures the tensile strength and its variation curve during the test. 

WHAT YOU NEED

available instruments

Proceq DY-2

The DY-2 series covers the entire field of pull-off applications, combining extreme ease of use with an unparalleled ability to store a complete series of tests. Pull-off measurement is one of the most widely used test methods in the construction industry.

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DOWEL AND EYEBOLT EXTRACTION TESTING

Dowel and eyebolt extraction testing is carried out by fixing a special adapter to the element to be extracted (dowel, threaded bar or eyebolt) and starting the pulling operation. When the dowel begins to slip off, the pressure gauge will indicate the force applied to overcome the sealing resistance.

WHAT YOU NEED

instrument

Extraction tester (DYNATEST)

Specific instruments for measuring the anchorage force of bolts and dowels; available in two versions, respectively with digital or analogue pressure gauge. The different models are distinguished by the tensile strength, variable from 5 to 100 kN

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