STEP  1 

Objective:

To determine the compressive strength of hardened concrete as per IS:516.

Apparatus used:

Compression Testing Machine (CTM)

Specimen type:
Cube

STEP  2 

 Provide Specimen Details

Enter the date of casting of specimens:

Days

Select the size of cube specimens:

--Select-- 10 15 cm

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STEP  3   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.

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STEP  4   Specimen 1   Clean the bearing surfaces of the CTM before positioning of the specimens.

 Place the specimen in the CTM. Cube specimens shall be compressed perpendicularly to the direction of casting.

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STEP  5   Specimen 1   Click on CTM panel to enter the rate of loading.

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STEP  6   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 /

Load at failure:		KN
Time:		sec.

Click Next to Repeat test for other two specimen.

STEP  7   Specimen 2   Clean the bearing surfaces of the CTM before positioning of the specimens.

 Place the specimen in the CTM. Cube specimens shall be compressed perpendicularly to the direction of casting.

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STEP  8   Specimen 2   Click on CTM panel to enter the rate of loading.

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STEP  9   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 /

Load at failure:		KN
Time:		sec.

Click Next to Repeat test for third specimen.

STEP 10  Specimen 3   Clean the bearing surfaces of the CTM before positioning of the specimens.

 Place the specimen in the CTM. Cube specimens shall be compressed perpendicularly to the direction of casting.

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STEP 11  Specimen 3   Click on CTM panel to enter the rate of loading.

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STEP 12  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 /

Load at failure:		KN
Time:		sec.

Click Next to Repeat test for third specimen.

STEP 13 Observations: Click the show button to see the observations for all the three specimens.

Load at failure of Specimens (F)
Specimen 1	Failure Load:
Specimen 2	Failure Load:
Specimen 3	Failure Load:
Compressive stress at failure (fc = F/Ac)
Specimen 1	MPa(N/mm2)
Specimen 2	MPa(N/mm2)
Specimen 3	MPa(N/mm2)

STEP 14 Results: Click view button to see the results.

	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 =

Click Next to Repeat Test with Specimen 3.

STEP 15  Specimen 3*   Clean the bearing surfaces of the CTM before positioning of the specimens.

 Place the specimen in the CTM. Cube specimens shall be compressed perpendicularly to the direction of casting.

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STEP 16  Specimen 3*   Click on CTM panel to enter the rate of loading.

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STEP 17  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 /

Load at failure:		KN
Time:		sec.

Click Next to Repeat test for third specimen.

STEP 18 Final Results: Click View button to see Results for 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 =

Click Next to Generate Report.

STEP 19

Report Size of specimen= Date of Specimen= //

No.	Age in days	Date of testing	Load at failure (KN):	Compressive Stress at Failure(fc)	Avg. value MPa(N/mm2)	Result
Specimen 1
Specimen 2
Specimen 3
Specimen 3*