Flexural Strength Test of Concrete (Beam)
Objective:
To determine the flexural strength of hardened concrete as per IS:516
Apparatus used:
CTM, four point loading setup
Specimen Type
Beam
STEP
1
Provide Specimen Details
Enter the date of casting of specimens:
Select the size of the Specimen:
mm| Age of specimen | |
| Size of specimen | |
| Number of specimens |
STEP
2
Click on the specimens to take them out of the curing tank.
Click on the cloth to wipe off the surface water on the specimens.
STEP
3
Place the specimen in the machine such that the load shall be applied to the
uppermost surface as cast in the mould.
uppermost surface as cast in the mould.
STEP
4
Enter the rate of loading in kN/min so that the effective rate of loading is equal to 0.7 N/mm2/min
Rate of loading
kN/min
STEP
5
Specimen 1
Step 1: Click on the dial of CTM for zoomed view.
Step 2: Click Start button of CTM to initiate the test.
Step 3: Click Stop Button to see Values
Click Next
| Load at Failure: | kN | |
| Time: | sec. |
STEP
6
Type of fracture Specimen 1
Examine the fractured specimen and record the type of fracture
STEP
7
Specimen 2
Step 1: Click on the dial of CTM for zoomed view.
Step 2: Click Start button of CTM to initiate the test.
Step 3: Click Stop Button to see Values
Click Next
| Load at Failure: | KN | |
| Time: | sec. |
STEP
8
Type of fracture Specimen 2
Examine the fractured specimen and record the type of fracture
a= distance between the line of fracture and the nearer support. For type B failure ‘a’ shall be less than 200 mm but greater than 170 mm for 150 mm specimen, or less than 133 mm but greater than 110 mm for a 100 mm specimen.
Value of a (mm)=
STEP
9
Specimen 3
Step 1: Click on the dial of CTM for zoomed view.
Step 2: Click Start button of CTM to initiate the test.
Step 3: Click Stop Button to see Values
Click Next
| Load at Failure: | KN | |
| Time: | sec. |
STEP
10
Type of fracture Specimen 3
Examine the fractured specimen and record the type of fracture
a= distance between the line of fracture and the nearer support. For type B failure ‘a’ shall be less than 200 mm but greater than 170 mm for 150 mm specimen, or less than 133 mm but greater than 110 mm for a 100 mm specimen.
Value of a (mm)=
STEP
11
Specimen 3*
Step 1: Click on the dial of CTM for zoomed view.
Step 2: Click Start button of CTM to initiate the test.
Step 3: Click Stop Button to see Values
Click Next
| Load at Failure: | KN | |
| Time: | sec. |
STEP
12
Type of fracture Specimen 3*
Examine the fractured specimen and record the type of fracture
STEP
13
Observations:
Click Show button to see Observations for all 3 specimens
| Specimen No. | Load at failure of samples (P) | Type of fracture |
| Specimen 1 | ||
| Specimen 2 | ||
| Specimen 3 | ||
| Specimen 3* | ||
| Specimen No. | Modules of rupture fcr of samples (  for failure type A and  for failure type B ) |
|
| Specimen 1 | MPa(N/mm2) | |
| Specimen 2 | MPa(N/mm2) | |
| Specimen 3 | ||
| Specimen 3* | MPa(N/mm2) | |
STEP
14
Result
| Flexural stress at failure = modulus of rupture(fcr) | |
| Specimen 1 | |
| Specimen 2 | |
| Specimen 3 | |
| Result: Average flexural strength = | |
STEP
15
Report
Size of specimen=
Curing condition=
Concrete grade=
| No. | Identification mark | Age in days | Testing date | Maximum load(kN) | Failure type | Value of a(cm) | Flexural strength(MPa) | Avg. value |
| 1 | ||||||||
| 2 | ||||||||
| 3 |
STEP
8
Results:
Click View button to see Results
Click Next to Repeat Test with New Specimen.
| Compressive Stress at Failure(fc) | fca +/- 0.15 fca | Check: fc-0.15 fca<fc<fc+0.15 fca | |
| Specimen 1 | |||
| Specimen 2 | |||
| Specimen 3 | |||
| Average, fca | |||
| Result : Average Compressive Strangth = | |||
STEP
9
Final Results:
Click View button to see Results for new specimen
Click Next to Generate Report.
| Compressive Stress at Failure(fc) | fca +/- 0.15 fca | Check: fc-0.15 fca<fc<fc+0.15 fca | |
| Specimen 1 | |||
| Specimen 2 | |||
| Specimen 3 | |||
| Average, fca | |||
| Result : Average Compressive Strangth = | |||
STEP
10
