The quality of concrete is mainly judged by its compressive strength directly affecting the load-bearing capacity and durability of concrete structures. Schmidt Hammer, most widely used test hammer for analyzing the compressive strength of concrete properties.
The Schmidt hammer will hit the concrete at a defined energy whereas its rebound is dependent on the hardness of the concrete and is measured by the instrument.
Ultrasonic Pulse Velocity (UPV) testing is used to determine the integrity and quality of structural concrete or stone (up to 6 feet thick) by measuring the speed and attenuation of an ultrasonic wave passing through the element being tested.
Identify voiding, honeycombing, cracking and other defects
Identify areas of low-quality concrete
Define the size and shape of a defect by using multiple test paths
Crack Depth Determines the depth of perpendicular cracks according to BS 1881.
E-Modulus Determine the dynamic E-Modulus of a material (e.g. concrete or rock) by measuring P- and S-wave pulse velocities.
Area Scan 2D-visualization for uniformity testing on structural elements.
The core test is required when the result of concrete cubes are not giving satisfactory result.
In case of doubt regarding the grade of concrete used either due to poor workman ship or based on result of cube strength test, compressive strength test of concrete core may be carried out.
In addition core cutter test is used for determining the existing structural strength of concrete also evaluated structural capacity or safety assessment of the existing structure.
Also the case of rehabilitation in the existing structure, the concrete element is the most important factor so this concrete is tested with the help of core cutter test.
Core cutter test is finding the strength of existing structure.
Also the case of rehabilitation in the existing structure, the concrete element is the most important factor so this concrete is tested with the help of core cutter test.
Core cutter test is finding the strength of existing structure.
Concrete chemistry is obviously tough to understand for a small house owner. Spending some amount towards concrete carbonation test is an excellent idea to know the effect of the atmospheric CO2 on the RCC structure. The concrete carbonation test for in-situ concrete is associated with the corrosion of reinforcement steel. Due to the concrete carbonation, reinforcement corrosion often occurs on the building facades which are exposed to moisture, rainfall and shaded from sunlight. The steel corrosion in concrete also occurs due to the carbonation, when the concrete has a least cover over the steel reinforcement.
Due to concrete carbonation, its alkalinity reduces and having a way for the corrosion. The corrosion leads to an expansion in volume of film over steel bar. This expansion in volume create cracks in concrete. This cracks further invite CO2. Thus the vicious cycle continues and ultimately leading structure in a disaster state.
The half-cell potential test is the only corrosion monitoring technique standardized in ASTM C876 – 15: Standard Test Method for Corrosion Potentials of Uncoated Reinforcing Steel in Concrete. It is used to determine the probability of corrosion within the rebar in reinforced concrete structures.
The test does not actual corrosion rate or whether corrosion activity has already started, but it indicates the probability of the corrosion activity depending upon the actual surrounding conditions. If this method used in combination with resistivity measurement , the accuracy is higher.
Electrical resistivity can be related to certain performance characteristics of concrete and can be used as a promising quality assurance tool for fresh or hardened concrete. It can be used as a measure of concrete resistance to chloride ingress as well as corrosion initiation and rate measurements. The concrete diffusion coefficient as an important factor in the service life estimation of structures also can be obtained by electrical resistivity technique. In addition, it is a reliable test method to detect and monitor the initiation and propagation of cracks in concrete since they change the connectivity of concrete pore structure, and thus its electrical conductivity.
Another potential application of the electrical resistivity method is to compute the moisture content of concrete, although reliability of this method is still under question. However, electrical resistivity method is a simple and reliable nondestructive test method; the application and reliability of this method in determining certain characteristics of concrete has yet to be widely evaluated.
The Ferro Scan Test or Cover Measurement is one of the non-destructive tests used to determine the positions and the quantity of reinforcement steel inside concrete members. This test can be used to inspect old buildings which do not have structural drawings or may only have outdated drawings which may not include any later renovations. The Ferro Scan Test is used to determine the current positions and the quantity of reinforcement steel in concrete members, the data of which can be further used to determine the load carrying capacity of the structures.
Perform With ferroscan test.
A crack is a linear fracture in concrete which extends partly or completely through the member. In a concrete element, tensile stresses are initially carried by the concrete and reinforcement. When the tensile stresses in the beam exceeds the tensile capacity, the concrete cracks. After this point the tensile force is transferred completely to the steel reinforcement. Cracks can occur during the concrete construction, placement and curing. They can also at any time during the service life of the structure. Cracks cab be sign of structural problems, or a result of concrete deterioration. There are cases where structural engineers are interested in the crack depth measurement. Crack depth is used to evaluate structural integrity, and verify durability performance. Crack depth measurement can help repair contractor in evaluating the repair costs. Depending on the nature of the project, engineers rely on different intrusive and non-intrusive techniques to estimate the crack depth.
I. Visual Examination of Concrete Cores
II. Impact-Echo Method
III. Ultrasonic Pulse Velocity (UPV)
Pipe leaks within concrete, i.e., “slab leaks” are identifiable with a thermal imaging camera.Many homes today in various parts of the country are built with concrete and in-floor radiant heating in concrete slabs, and homes dating back to the 1950s as well. As the odds are in favor of encountering concrete more than once, FLIR can help ease the process when it comes to inspecting this dense material. In addition to water leaks, radiant coil heating issues in concrete slabs are often of concern as well, so we’ll touch on that process as it pertains to conducting a thermal inspection on a concrete home.
Load carrying capacity test (Load Test)