Procedure:1. Measure the dimensions of the specimen and the record them in the date sheet2. Turn the specimen on its side with respect to its position as molded and center in on life supportblocks.3. Center the loading system in relation to the applied force.4. Bring the load applying-block in contact with the surface of the specimen at the center andapply a load between 3 and 6% of the estimated load.5. Grind cap, or use leather shims on the specimen contact surface to eliminate any gap in excessof 0.004 inch (0.10 mm). Gaps in excess of 0.15 inch (0.38 mm) shall be eliminated by cappingor grinding.6. Apply the load on the specimen continuously and without shock. The load shall be applied atthe constant rate to the breaking. Apply the load at such a rate that constantly increases theextreme fiber stresses between 125 and 175 psi/min. (0.86 and 1.21 MPa/min) when calculateduntil rupture occurs.7. Take three measurements across each dimension (one at each edge and at the center) to thenearest0.05 in. (1 mm) to determine the average width and depth of the specimen at the pointof fracture. If the fracture occurs at a capped section, include the cap thickness in measurement. Calculation:For center Loading:MR = 3PL / 2bd?Where:MR- modulus of rupture, psi (MPa)P= maximum load applied as indicated by testing machine, in Ib (N)L= span length, in inches (mm)b= average width of specimen in inches (mm)d= average depth of specimen, at the fracture, in inches (mm)Note: The weight of the beam is not included in the above calculation.Tabulated Data and ResultSample No.L (mm)B (mm)D (mm)P (N)MR (MPa)145015015023000245015015021000345015015019000

Answered: Image /qna-images/answer/65d5585a-ed1c-4334-9e9c-11b0f52b2c9b.jpg

Calculation: For center Loading: MR = 3PL / 2bd? Where: MR- modulus of rupture, psi (MPa) P= maximum load applied as indicated by testing machine, in Ib (N) L= span length, in inches (mm) b= average width of specimen in inches (mm) d= average depth of specimen, at the fracture, in inches (mm) Note: The weight of the beam is not included in the above calculation. Tabulated Data and Result Sample No. L (mm) В (mm) D (mm) P (N) MR (MPa) 1 450 150 150 23000 450 150 150 21000 3 450 150 150 19000

Calculation: For center Loading: MR = 3PL / 2bd? Where: MR- modulus of rupture, psi (MPa) P= maximum load applied as indicated by testing machine, in Ib (N) L= span length, in inches (mm) b= average width of specimen in inches (mm) d= average depth of specimen, at the fracture, in inches (mm) Note: The weight of the beam is not included in the above calculation. Tabulated Data and Result Sample No. L (mm) В (mm) D (mm) P (N) MR (MPa) 1 450 150 150 23000 450 150 150 21000 3 450 150 150 19000

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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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…