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If testing the concrete casting side is in horizontal direction, then angular correction and
casting surface correction are not needed. Before the test, test direction and concrete
casting surface are set, so the apparatus will correct the average rebound value
automatically.
Concrete strength value of testing zone: after testing, it needs to calculate the average
rebound value of testing zone and conduct relevant correction. According to user's
requirement, it needs to choose "national standard-pumping" or "national standard-non
pumping" and then get concrete strength value of testing zone according to carbonization
depth value. For example, average rebound value is 24, test angle is 30 upward, casting
surface is top surface, carbonization depth is 0.5mm. If angular correction is -2.8 and then
the corrected rebound value is 21.2; if top surface correction value is +2.1, the corrected
rebound value is 23.3; rebound value 23.3 and 0.5mm carbonization depth corresponds to
the concrete strength of 13.4Mp.
Concrete strength value and standard deviation of components: after testing the
components, the apparatus shall calculate the concrete strength value and standard
deviation of components automatically and save them, according to the relevant formulas
of Regulations.
1.5.2. Calculation of concrete strength under customized measuring mode.
When user's preset parameter does not confirm to Regulations, that is, customized
measuring mode, such as the test times are less than 16.
Calculation of average rebound value of testing zones. After the testing, maximum and
minimum values are not taken out, only conduct the average calculation.
For angular correction, casting surface correction, the setting, calculation, standard
measuring mode and correction method of these two parameters are the same.
Concrete strength value of testing zone: after testing, it needs to calculate the average
rebound value of testing zone and conduct relevant correction, if the user chooses
"national standard-pumping" or "national standard-non pumping", it can get concrete
strength value of testing zone according to carbonization depth value. This concrete
strength value can only be used as a reference value, because it does not conform to the
relevant provisions of Regulations. If the user has already formulated its own specific curve,
and set the apparatus strength-measuring curve as this specific curve, the apparatus will
refer to the table to get the concrete strength formulated by user itself.
Concrete strength value and standard deviation of components: after testing the
components, the apparatus will average the contained concrete strength value of testing
zone and get the concrete strength of component, and calculate the standard deviation
automatically according to the relevant formulas.
If the parameters, calculating method and apparatus used by the user are different from
the set ones, the original rebound value can be transmitted to computer taking
components as unit via the equipped upper computer software.
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