Indicate whether the following statements are true or false. The quality of a visual inspection is affected primarily by; i) The quality of the detector (eye or camera), ii) The lighting conditions, iii) The capability to process the visual data, iv) The level of training and attention to detail Visual inspection is a very simple and basic method; therefore, it is not considered as one of the commonly employed NDT methods. The two phases involved in applying the maturity method to estimate the in-situ strength of concrete are i) Laboratory testing and ii) Field measurement of the in-place temperature history Optical aids such as mirrors, magnifiers and comparators are often used as a tool of visual inspection. The most popular nondestructive test used on concrete structures is the rebound hammer test. The two parameters needed in the Nurse-Saul Maturity Function is Apparent Activation Energy and Datum Temperature. Visual inspection is simple to perform, low in cost and relatively quick, however, it is inspector dependent and standards often do not exist. According to the maturity method, strength gain of concrete can be estimated based on the measured temperature history of concrete. While testing the properties of a concrete member, a test can only be considered as a "nondestructive test method" if absolutely no damage is given to the member. The reading of the rebound hammer is sensitive to local variations in the concrete, especially to aggregate particles near to the surface.
Indicate whether the following statements are true or false. The quality of a visual inspection is affected primarily by; i) The quality of the detector (eye or camera), ii) The lighting conditions, iii) The capability to process the visual data, iv) The level of training and attention to detail Visual inspection is a very simple and basic method; therefore, it is not considered as one of the commonly employed NDT methods. The two phases involved in applying the maturity method to estimate the in-situ strength of concrete are i) Laboratory testing and ii) Field measurement of the in-place temperature history Optical aids such as mirrors, magnifiers and comparators are often used as a tool of visual inspection. The most popular nondestructive test used on concrete structures is the rebound hammer test. The two parameters needed in the Nurse-Saul Maturity Function is Apparent Activation Energy and Datum Temperature. Visual inspection is simple to perform, low in cost and relatively quick, however, it is inspector dependent and standards often do not exist. According to the maturity method, strength gain of concrete can be estimated based on the measured temperature history of concrete. While testing the properties of a concrete member, a test can only be considered as a "nondestructive test method" if absolutely no damage is given to the member. The reading of the rebound hammer is sensitive to local variations in the concrete, especially to aggregate particles near to the surface.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Indicate whether the following statements are true or false.
The quality of a visual inspection is affected primarily by; i) The quality of the detector (eye or
camera), ii) The lighting conditions, iii) The capability to process the visual data, iv) The level of
training and attention to detail
Visual inspection is a very simple and basic method; therefore, it is not considered as one of
the commonly employed NDT methods.
The two phases involved in applying the maturity method to estimate the in-situ strength of
concrete are i) Laboratory testing and ii) Field measurement of the in-place temperature
history
Optical aids such as mirrors, magnifiers and comparators are often used as a tool of visual
inspection.
The most popular nondestructive test used on concrete structures is the rebound hammer
test.
The two parameters needed in the Nurse-Saul Maturity Function is Apparent Activation
Energy and Datum Temperature.
Visual inspection is simple to perform, low in cost and relatively quick, however, it is inspector
dependent and standards often do not exist.
According to the maturity method, strength gain of concrete can be estimated based on the
measured temperature history of concrete.
While testing the properties of a concrete member, a test can only be considered as a
"nondestructive test method" if absolutely no damage is given to the member.
The reading of the rebound hammer is sensitive to local variations in the concrete, especially
to aggregate particles near to the surface.
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