Concrete surface resistivity testing is completely non-destructive, simple to perform and yet is one of the most versatile test methods for on-site evaluation of concrete. Information can be obtained about the likelihood of corrosion, the corrosion rate and the curing efficiency. It can even be used to predict the durability of a structure.
Further to the traditional applications describe above, the Resipod incorporates the necessary features required for a new AASHTO (American Association of State Highway and Transportation Officials) standard test method for estimating the permeability of hardened concrete by means of a surface resistivity measurement. This test method, which requires only a few minutes to perform, is intended to replace laborious laboratory methods such as the bulk diffusion test and the rapid chloride penetration test.
Available in two versions with industry standard 50 mm (1.9”) contact spacing and 38 mm (1.5”) contact spacing, the Resipod has a number of unique features. It is the most accurate surface resistivity meter available. It is the only fully integrated four point Wenner Probe on the market with on-board memory and a USB connection to a PC. It is supported by Resipod Link software, making analysis of the results a simple matter. The standard probes can be removed to allow the user to attach custom probe configurations or a variable spaced probe. The software allows the setting of the probe width as required.
The Pundit PL-200 is a best-in-class ultrasonic pulse velocity (UPV) test instrument to examine the quality of concrete and other materials such as rock, wood and ceramics etc.
It provides an extended range of measurement modes and superior features for on-site testing: Assess the concrete uniformity using standard A-Scans, Line Scans and the new Area Scan functionality; estimate the compressive strength of concrete or measure the surface velocity and the depth of perpendicular cracks. The Data Logging measurement mode allows the automation of long term measurements.
The intelligent software supports directly accessible settings in real time from the measuring screen. The highest resolution and sharpest image available in the market allows best possible analysis of the measured waveforms.
Proceq offers an extensive range of transducers for the Pundit PL-200 providing highest accuracy and a proven field track record.
Proceq Canin + (Corrosion Analyzing Instrument) will be a definite tool while investigating old structures like dams, bridges, buildings etc., where there is a possibility of corrosion on rebars. These instruments offer precise measurements on finding out the corrosion over the rebars on a concrete structure. Proceq's Canin + has been in use among the investigating civil engineers, all over the world, since many years now and has been well accepted as a testing method to assess the corroded regions and helps to quickly draw the chipping diagaram for strengthening and rehabilitation works. Being a half cell potentiometer test, it adheres to international standards and engineers could use the option of "ROD ELECTRODE (for localized corrosion mapping)" or the "ROD & WHEEL ELECTRODE (for localized or on a large area like on a bridge deck, dam, etc.,)" along with "PROVISTA SOFTWARE" to assess & report the findings. Canin+ is a portable, battery (AA batteries) operated device which could be used for extended hours in the field for the referred work.
The display area of the instrument directly presents the test area and relevant readings.
At a time up to 240 assessment values are shown in an easy-to read grey-scale and is facilitated by a menu-driven approach for easy operation using just nine functions keys.
It is possible to store a total memory of 2,35,000 readings.
The Canin Pro Vista Software permits downloading, showcasing and refining the data gauged by the Canin+ half-cell instrument.
Novel features like the backlight display and quick processing of data enhances the functionality of the Canin.
Surface resistivity measurement provides extremely useful information about the state of a concrete structure. Concrete Resistivity Meters not only has it been proven to be directly linked to the likelihood of corrosion and the corrosion rate,recent studies have shown that there is a direct correlation between resistivity and chloride diffusion rate.
The versatility of the method can be seen in these example applications:
Resipod is a fully integrated 4-point Wenner probe, designed to measure the electrical resistivity of concrete in a completely non-destructive test . It is the most accurate instrument available, extremely fast and stable and packaged in a robust, waterproof housing designed to operate in a demanding site environment.
The rate at which the mass concrete (poured concrete at the construction site) cures is much faster than the rate at which the 'site casted' cube / cylinder cures! Advanced research findings has proved that it has many benefits for the construction industry. The method of estimating the concrete strengtth by knowing the temperature of the curing concrete is called "Maturity Method ". "ZoneCure Wireless Maturity System" has many advantages over the conventional systems available in the market as it offers a complete data of tempreature histories over the curing cycle of poured concrete and all the accessories are "re-usable". ZoneCure Maturity System adheres to ASTM C 1074 standards and will be most useful and beneficial instrument for the contractors and construction companies as it could save millions of rupees / dollars by reducing the cycle time, optimising the mix for the project, and drastic reduction in inventoroies!
Post-Tensioned Structures / Precasting industries:
The biggest economic savings of maturity testing for a contractor is realized in post tensioned structures / precasting industries as ZoneCure system could estimate and provide the strength achieved by the concrete poured which could be used how much sooner the forms could be stripped or post-tensioning can begin.Findings has shown that contractors could save at least one days wait for each pour.
Test cubes /cylinders have been used for decades as the benchmark of the compressive strength of concrete. In fact, test cylinders remain the most widely used barometer of concrete strength. And while test cylinders will always have a place in constructing the worlds structures, maturity testing provides new and critical information about the status of the concrete that is actually in the structure.
Tunnel and Jump Forms
Con-Cure is allowing one contractor in St. Louis to strip tunnel forms within 7 hours of end of finishing operations using immediate reshoring technique.
Con-Cure is allowing one contractor in California to speed construction of new suspension bridge north of San Francisco by confirming in-place strength.
Very difficult working conditions at both sites make taking cylinders virtually impossible.
ZoneCure Maturity Systems (ASTM C 1074) to know the early age strength of poured concrete right from the pour site:
Measurements can be transferred to a printer or to a PC for detailed analysis and evaluation.
ZoneCure 1000 Module
ZoneCure Wireless Systems are user-configurable!
Each system includes :
ZoneCure 1000 with a " 10-30" Package :
The easily transportable, manual pull-off tester determines strength of concrete overlay adhesion and is also ideal for measuring the strength of applied coatings, such as plastics, mortars, plasters, bituminous coats, as well as paint and other coatings on metals. Available in manual and electronic versions, the DY Pull-off tester tests at any measuring point on the component,without requiring specimen preparation.
A crank drive, available as a manual unit or with an electric drive option, provides a constant, jerk-free load increase. Adjustable legs optimize measurements for the specific test situation. This instrument is essential for diagnosing damage to building structures and for verifying quality of completed renovations. .
The DIGI Schmidt Hammer was developed for the non destructive measurement of the concrete compressive strength and controlling the uniform concrete quality.
Besides showing the basic settings on the included display unit, the Digi Schmidt offers the transmission of the measured data to a standard printer or to a PC. This supersedes the time consuming business of note taking, allowing the user to focus on the essential. The window based software ProVista allows downloading, presenting and editing of the measured values in a fast and easy way.
The DIGI Schmidt Hammer is equipped with a sensor which measures the rebound value of a test impact to high resolution and repeatability. With the DIGI Schmidt Hammer, various parameters such as impact direction, form factor and time factors such as carbonation depth can easily be set.