PCE Health and Fitness PCE-HT 224E, Operation Manual

Page: 6 / 29

Carbonization depth: concrete carbonization depth is a kind of chemical corrosion of
concrete, and the process reducing concrete alkalinity is called concrete carbonization.
Carbonization depth value can be obtained according to the relevant methods of
Regulations . When input carbonization depth, only have to input a number between
0.0mm and 6.0mm and then the apparatus can, according to the input carbonization depth
value, calculate the concrete compressive strength value.
Test of pump concrete strength, set the curve as “national-pumping”. According to the
Regulations , the apparatus calculate the corrected value of pump concrete strength and
strength-measuring curve, and the calculated concrete compressive strength value is the
strength value of pump concrete.
Strength-measuring curve, the apparatus has four optional curves in total, “national
standard-pumping”, “national standard-non pumping”, “specific curve 1” and “specific
curve 2”. “National-pumping” curve is a strength-measuring curve formulated according to
national unified curve and corrected value of pump concrete strength. When testing the
concrete compressive strength, shall choose “national standard-pumping” for strength-
measuring curve. “National standard-non pumping” curve is a strength-measuring curve
formulated according to national unified curve. For “specific curve 1” and “specific curve
2”, Test Unit can formulate specific strength-measuring curve for itself according to the
relevant provisions of
Regulations , which can be used right after being saved in the
apparatus via equipped software, and the national standard curve is directly preset in the
apparatus.
Strength value displayed by test surface and rebound value at the same time; it is calculated
in a different way from that used for the rebound strength value achieved by completing
testing zone or structure test. According to the set parameters, rebound value is corrected
accordingly, and then the strength result is calculated according to the set curve. The
treatment of average value and taking out the max and min value is not conducted, so this
strength value is only a reference value.
1.5. Concrete Strength Calculation
1.5.1. Concrete strength calculation under standard measuring mode.
Under standard measuring mode, the parameters setting, strength curve and calculating
method of the apparatus all conforms to the relevant provisions of Regulations.
Calculation rules of average rebound value of the testing zone: Each testing zone shall be
at least tested 16 times. After 16 times measurements, take 3 maximum values and 3
minimum values out of the 16 rebound values, and get the average value of the remained
10 rebound values. This average value is the average rebound value of testing zone.
Angular correction: when testing concrete casting side in non horizontal direction, angular
correction value shall be added to average rebound value. Angular correction value
(Appendix 1). For example, average rebound value is 24, test angle is 30 upward, angular
correction value is -2.8 and the corrected rebound value shall be 21.2.
Casting surface correction: when testing the concrete casting top surface or bottom surface
in horizontal direction, casting surface correction value shall be added to average rebound
value. Casting surface correction value (Appendix 2). For example, average rebound value
is 24, casting surface is top surface, top surface correction value is +2.1, the corrected
rebound value is 26.1.
When testing, if the rebound apparatus is in non horizontal direction, and the tested
surface is non concrete casting side, shall conduct angular correction at first and then
conduct casting surface correction. For example, average rebound value is 24, test angle is