Defects in concrete can occur during and after construction. During construction bad consolidation can leave air voids, honey combing, or concrete may crack during curing. Visual inspections will not locate hidden flaws in a structure or measure the extent a visible defect projects into the structure. Defect location testing systems often take advantage of different forms of sonic testing
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Perhaps the easiest thing to do is to tap around visibly weak areas with a hammer. If the head of the hammer bounces, the concrete’s compressive strength is good. If the hammer indents and pulverizes the surface, the concrete is unsound and should come out. Dragging a screwdriver across the surface can also expose unsound concrete. If it leaves a shiny white streak, the concrete is sound
FPrimeC offers a wide range of engineering solutios for non-destructive evaluation of concrete defects: ultrasonis testing, gpr, impact-echo, and intrusive
Delamination of concrete is a serious problem both for the integrity of the structure and from a Health and Safety aspect. Whilst delaminated concrete can be readily observed in many instances it is not always obvious without undertaking a delamination survey which involves tapping the concrete with a survey hammer at regular intervals to
Blow of hammer (0.4 kg) upon concrete surface: Blow of hammer (0.4kg) upon chisel placed at right angles to concrete surface: Scratching by chisel: Blow 6.0: Sound-toneless deep dent with crumbling edges: Chisel is easily driven into concrete: Concrete cuts easily and crumbles: 6-10: Sound-slightly toneless. Dent has smooth edges, concrete crumbles
Nov 20, 2019 · Cracks in concrete piles are more common in hard-driving situations, but when they occur during easy driving, check hammer-pile alignment because bending may be causing the problem. If the alignment appears to be normal, the combined tension and bending may be too high. Concrete Pile Is Spalling or Slabbing Near the Head Jordanlye / Getty Images
Rebound Hammer test is a Non-destructive testing method of concrete which provide a convenient and rapid indication of the compressive strength of the concrete. The rebound hammer is also called as Schmidt hammer that consist of a spring controlled mass that slides on a plunger within a tubular housing. The operation of rebound hammer is shown
Concrete delamination survey testing services. Delamination or Tapping surveys: Delaminations are not usually visible on the concrete surface, but wet stains or nearby spalling concrete may indicate areas where delamination is likely. Sounding is a simple and effective method to identify and locate delamination below the concrete surface
Nov 01, 2017 · The subsurface defect regions identified by the proposed system were confirmed through the results of other NDT techniques including hammer sounding and HCP testing. Thus, UAVs could provide reliable, rapid and cost-effective bridge deck evaluation compared with conventional methods, which involve laborious inspections of bridge decks
Jun 04, 2020 · 6.2 Construction Manager. Responsible for the entire operation of concrete repair works complying with quality and safety requirements. To ensure that the team of supervisor and foreman are aware of this Method Statement and all the resources are available to carry out the work as planned. Ensure the construction HSE plan, procedures, and
Gold Member Since 2015. Audited Supplier ... Inspecting concrete defects by ultrasonic method, such as uncompacted place, cellular hole area ... Can connect with the test hammer directly to detect the concrete strength. The function has been applied for national patent
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