Concrete Technology Lab HW Below the results of rebound number shown in table 1 for a little thick wall, calculate the approximate compressive strength: Table 1: Rebound Number reads 1 2 3 11 10 12 13 15 14 50 40 43 52 47 54 4 5 6 7 8 9 46 20 48 x 44 51 46 25 53 No. RN reads 50

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Chapter2: Loads On Structures
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Concrete Technology Lab HW
Below the results of rebound number shown in table 1 for a little thick wall,
calculate the approximate compressive strength:
Table 1: Rebound Number reads
No.
13 14
15
1 2 3 4 5 6 7 8 9 10 11 12
43 52 47 54 46 20 48
RN reads
50
40
44 46
51
25
53
50
*
Beton-Prüfhammer N/NR-Scléromètre à béton N/NR. Concrete Test Hammer N/NR
70
60
50
40
30
35
40
Rebondissement R Rebound R
RN reads
Druckfestigkeit (Würfel 200 mm)
Résistance à la compression (cube de 200 mm)
Compressive strength (cube of 200 mm)
Wm N/mm²
Solution:
30
20
10
25
20
Rückprall R
No.
45
Betonaiter 14 bis 56 Tage
Age du béton 14 à 56 jours
Age of concrete 14 to 56 days
COPYRIGHT BY PROCEQ SA ZURICH
50
55
Fig. I
Compressive
strength, MPa
Transcribed Image Text:Concrete Technology Lab HW Below the results of rebound number shown in table 1 for a little thick wall, calculate the approximate compressive strength: Table 1: Rebound Number reads No. 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 43 52 47 54 46 20 48 RN reads 50 40 44 46 51 25 53 50 * Beton-Prüfhammer N/NR-Scléromètre à béton N/NR. Concrete Test Hammer N/NR 70 60 50 40 30 35 40 Rebondissement R Rebound R RN reads Druckfestigkeit (Würfel 200 mm) Résistance à la compression (cube de 200 mm) Compressive strength (cube of 200 mm) Wm N/mm² Solution: 30 20 10 25 20 Rückprall R No. 45 Betonaiter 14 bis 56 Tage Age du béton 14 à 56 jours Age of concrete 14 to 56 days COPYRIGHT BY PROCEQ SA ZURICH 50 55 Fig. I Compressive strength, MPa
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