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Test Data and result Sample # Age (days) R (mm) Area (mm^2) Q(N) о (MPa) 1 7 100 400000 7 100 410000 3 7 100 390000 4 14 100 530000 14 100 540000 14 100 520000 7 21 100 600000 8. 21 100 620000 9 21 100 610000 10 28 100 700000 11 28 100 680000 12 28 100 720000

Test Data and result Sample # Age (days) R (mm) Area (mm^2) Q(N) о (MPa) 1 7 100 400000 7 100 410000 3 7 100 390000 4 14 100 530000 14 100 540000 14 100 520000 7 21 100 600000 8. 21 100 620000 9 21 100 610000 10 28 100 700000 11 28 100 680000 12 28 100 720000

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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with calculations please

Procedure: 1. Compression tests on specimens shall be made as soon as practicable after removal from the moist storage. A 28-day test shall be performed within +-20 hours of the 28thday. Test specimens shall be kept moist by any convenient method during the period between removals from moist storage and testing. They shall be tested in moist condition. 2. All test specimens for a given test age shall be broken within the permissible time tolerance prescribed below. TEST AGE PERMISSIBLE TOLERANCE 24 HOURS +-0.5 HOURS OR 2.1% 3 DAYS 2 HOURS OR 2.8% 7 DAYS 6 HOURS OR 3.6% 28 DAYS 20 HOURS OR 3.0% 90 DAYS 2 DAYS OR 2.2 % 3. With a clean rag or rush clean the bearing faces of the bearing blocks, test the specimens and exclusion controller (elastomeric cps). 4. Rest the specimen on the lower extrusion controller, place the top extrusion controller on the specimen, and check the spacing between the sides of the specimen and the extrusion controllers to ensure no contact between the cylinder and the steel. Slide the specimen and extrusion controller configuration into the center of the concentric circles of the lower bearing block. Check the alignment with the upper bearing face after lowering it into position. 5. Apply the load to the specimen. During the first half of the anticipated loading phase, a higher loading rate shall be permitted. The remainder of the loading shall be 20 to 50 psi/second (0.14 to 0.34 Mpa) Note: For 6 inches (150 mm) diameter specimens, the loading rate shall be 550 to 1400 lbs. /second. For 4-inch (100 mm) diameter specimen, the loading rate shall be 250 to 620 Ibs. /second. 6. Apply the load until the specimen fails, and record the maximum load supported by the specimen during the test rounded to the nearest 500 lb.
Transcribed Image Text:Procedure: 1. Compression tests on specimens shall be made as soon as practicable after removal from the moist storage. A 28-day test shall be performed within +-20 hours of the 28thday. Test specimens shall be kept moist by any convenient method during the period between removals from moist storage and testing. They shall be tested in moist condition. 2. All test specimens for a given test age shall be broken within the permissible time tolerance prescribed below. TEST AGE PERMISSIBLE TOLERANCE 24 HOURS +-0.5 HOURS OR 2.1% 3 DAYS 2 HOURS OR 2.8% 7 DAYS 6 HOURS OR 3.6% 28 DAYS 20 HOURS OR 3.0% 90 DAYS 2 DAYS OR 2.2 % 3. With a clean rag or rush clean the bearing faces of the bearing blocks, test the specimens and exclusion controller (elastomeric cps). 4. Rest the specimen on the lower extrusion controller, place the top extrusion controller on the specimen, and check the spacing between the sides of the specimen and the extrusion controllers to ensure no contact between the cylinder and the steel. Slide the specimen and extrusion controller configuration into the center of the concentric circles of the lower bearing block. Check the alignment with the upper bearing face after lowering it into position. 5. Apply the load to the specimen. During the first half of the anticipated loading phase, a higher loading rate shall be permitted. The remainder of the loading shall be 20 to 50 psi/second (0.14 to 0.34 Mpa) Note: For 6 inches (150 mm) diameter specimens, the loading rate shall be 550 to 1400 lbs. /second. For 4-inch (100 mm) diameter specimen, the loading rate shall be 250 to 620 Ibs. /second. 6. Apply the load until the specimen fails, and record the maximum load supported by the specimen during the test rounded to the nearest 500 lb.
CALCULATION: 0= Q/TtR? Where: o=compressive strength (MPa) Q=load at failure (N) R=radius of specimen (mm) Test Data and result Sample # Age (days) R (mm) Area (mm^2) Q(N) o (MPa) 1 7 100 400000 7 100 410000 3 7 100 390000 4 14 100 530000 14 100 540000 14 100 520000 7 21 100 600000 8 21 100 620000 9 21 100 610000 10 28 100 700000 11 28 100 680000 12 28 100 720000
Transcribed Image Text:CALCULATION: 0= Q/TtR? Where: o=compressive strength (MPa) Q=load at failure (N) R=radius of specimen (mm) Test Data and result Sample # Age (days) R (mm) Area (mm^2) Q(N) o (MPa) 1 7 100 400000 7 100 410000 3 7 100 390000 4 14 100 530000 14 100 540000 14 100 520000 7 21 100 600000 8 21 100 620000 9 21 100 610000 10 28 100 700000 11 28 100 680000 12 28 100 720000
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