Answered: 51. Describe the process for the…

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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When a sample subjected to the procedure of ASTM C40 produces a color darker than the standard color, Circular Disk No. 14 or Organic Plate No. 3 (Gardner Color Standard No. 14), the fine aggregate under test shall be considered to possibly contain injurious organic impurities. It is advisable to perform further tests before approving the fine aggregate for use in concrete. Identify that test to be performed.
Concrete is required for a building foundation that is placed on a soil with high chloride content. The design calls for a minimum rebar spacing of 100 mm and a concrete cover of 75 mm. Which one of the following sizes is considered an acceptable nominal maximum size for aggregates? O A) 43 mm O B) 39 mm O9 28 mm O D) 49 mm A concrete pavement in Alberta will be exposed to freeze-thaw and de-icing salts during its service life. Which of the following exposure classes best describes the environmental conditions that the concrete will be exposed to? OA F-2 O B) A-2 O D) S-2 Strength of the normal weight concrete depends mainly on: OA) Strength of the aggregate O B) Mixing time OC) Purity of the mixing water O D) Water to cement ratio A fine broom finish is done only for aesthetic purposes. OA) True O B) False O
Determine the long-term elastic modulus of elasticity for M 25 grade of concrete as per the provisions of IS 456:2000 if the present calculated strain and ultimate creep strain is 0.001 and 0.0025 respectively.
for the asphaltic material, the strain-time relationship , determined as follows under a shear stress of 200 psi. Determine the constants of the model represented behavior? 100 0.008 Time , sec Strain, In/In 50 0.002 0.005
In designing concrete structures, normally the maximum aggregate sizes adopted are within ranges of 10 mm to 20 mm. Discuss TWO (2)effects of increasing size of aggregate to more than 20 mm on the strength of concrete
Which of the following is NOT a benefit of using SCMs? Increase required concrete curing time Increase long term strength Reduce permeability Increase the resistance to chloride ions
Explain how 27Al NMR is useful for studying cement hydration.
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51. Describe the process for the multiple stress creep recovery (MSCR) test on asphalt binder.