Proceq N / L, Operating Instructions Manual

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2 .4 .3 Additional Conversion Curves
In addition to the two well known curves from Proceq SA,
we provide you four new curves developed in Japan that
were based on exhaustive tests.
Portland Cement J
for concrete with Portland cement
(similar to curve B-Proceq)
Early Strength J
for early strength concrete made
from Portland cement
Blast Furnace J
for concrete made from blast
Furnace cement
Average Curve J
is the mean curve of curves 6, 7 and 8
nb: In Japan, only the curve "Average" is used.
We recommend using the individual curves if the
respective concrete quality is known.
The four curves are shown in Fig. 2.7 together with the
B-Proceq curve.
The curves are valid for horizontal impacts and for the
conversion to a compressive strength in N/mm
2
evalu-
ated with concrete cubes 150/150/150 mm. For other
impact directions and sample size and shape, the
respective factors must be considered additionally.
For the user of the conversion curves, each "Japan"
curve is individually shown together with the B-Proceq
curve in Fig. 2.8 to 2.10
B-Proceq
Portland Cement
Early Strength
Blast Furnace
Average Curve
20 25 30 35 40 45 50
60
50
40
30
20
10
fc in
N/mm
2
(cube 150/150/150 mm
)
Rebound Value R
Fig 2.7 All J-Curves with the Proceq-B-Curve
B-Proceq
Portland Cement
20 25 30 35 40 45 50
60
50
40
30
20
10
fc in
N/mm
2
(cube 150/150/150 mm
)
Rebound Value R
Fig. 2.8 J-Curve "Portland Zement"
10 Measurement © 2017 Proceq SA