Schmidt Hammer/Rebound Hammer Rebound Hammer Test The Rebound Hammer Test is a non-destructive test of compressive strength of concrete conducted following the ASTM C805 standard. The compressive strength of concrete is a crucial value in structural assessment as it is the main variable that can affect the load carrying capacity of reinforced concrete structures. The…
Concrete pull-off test The Concrete Pull-Off Test is used to determine the direct tensile strength of a concrete or the bond strength of concrete mixture. The testing equipment consists of metal test circular plates, threaded rods, epoxy, a core drill, a load cell, a displacement transducer, and a hydraulic jack.
Nondestructive pile location detection Pile layout Detection One very common problem is that the drawing or evidence of the floor pile layout or location is missing. As a result, a thorough floor capacity analysis cannot be done. Load carrying capacity also cannot be verified. When dealing with one of these cases, RE team conducted the Non-Destructive Pile…
At a newly constructed school in Phuket, which consists of two building blocks, it was suspected that the strength of both the 1stfloor and the 2ndfloor precast slabs was not sufficient as it may have been shown in the design. Thus, a load test was requested to determine whether the structure was safe given the…
The Parallel Seismic Test is a non-destructive test used to determine the pile length when the details of the foundation are no longer available, or when the constructed pile length is questionable. Test equipment consists of accelerometers, an impact hammer, and the data acquisition system (DAQ). The hammer is used to create an impact at…
The Ferro Scan Test or Electromagnetic 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 This test can be used to inspect old buildings which do not have structural drawings or may only have outdated drawings which may not include any later…
The Steel Tensile Test is used to determine yield strength, ultimate strength, and fracture strength of existing steel members. In the testing process, samples are taken from the steel members in structures such as factory roof trusses or parking roof trusses. The results of the Steel Tensile Test will be used in further analyses and…
In a factory, when holes were drilled down on concrete beams to place the anchor bolts to support vibrating machines, air voids were found. However, the problem is, the location of the air void was unknown. The possibilities were that the air void was at drilling locations coincidently, was at some other locations or was…
Basic technique for building assessment Visual inspections are generally conducted as the first step of structural evaluations due to its simplicity and benefit-to-cost advantage. The structural geometries, e.g. tilting, levelness, plumb, and settlement, will be carefully investigated using geometric surveying equipment (digital theodolite, measuring tapes, bubble level, etc.) to identify the possible major structural threats.…
RE conducted the Chemical Anchor Pull Out Test. This chemical anchor was installed on the floor as moment-resisting support of the new column. Thus, this chemical anchor must be able to resist tension force according to the design. In this case, proof load according to the design was applied. Test frames, load cells, displacement transducers, and the…
