P1. An asphalt concrete cylindrical specimen with a 4-in. diameter and a 6-in. height is subjected to an axial compressive static load of 150 lb for 1 hour, after which the load is removed. The test was performed at a temperature of 100°F. The height of the specimen was measured at different time intervals during loading and unloading for a total of 2 hours and produced the results shown in Table 1. 0 Time, minutes a. Using a spreadsheet program, plot the stress versus time and the strain versus time on two separate graphs. b. How much is the elastic strain? 2 c. What is the permanent strain at the end of the experiment? d. What is the phenomenon of the change of specimen height during static loading called? What is the phenomenon of the change of specimen height during unloading called? 0.01 5 10 20 30 40 50 60 Specimen Height, inches 6.0000 5.9916 5.9870 5.9833 5.9796 5.9753 5.9725 5.9708 5.9696 5.9688 Time, minutes 60.01 62 65 70 80 90 100 110 120 Specimen Height, inches 5.9772 5.9807 5.9841 5.9879 5.9926 5.9942 5.9954 5.9959 5.9964

P1. An asphalt concrete cylindrical specimen with a 4-in. diameter and a 6-in. height is subjected to an axial compressive static load of 150 lb for 1 hour, after which the load is removed. The test was performed at a temperature of 100°F. The height of the specimen was measured at different time intervals during loading and unloading for a total of 2 hours and produced the results shown in Table 1. 0 Time, minutes a. Using a spreadsheet program, plot the stress versus time and the strain versus time on two separate graphs. b. How much is the elastic strain? 2 c. What is the permanent strain at the end of the experiment? d. What is the phenomenon of the change of specimen height during static loading called? What is the phenomenon of the change of specimen height during unloading called? 0.01 5 10 20 30 40 50 60 Specimen Height, inches 6.0000 5.9916 5.9870 5.9833 5.9796 5.9753 5.9725 5.9708 5.9696 5.9688 Time, minutes 60.01 62 65 70 80 90 100 110 120 Specimen Height, inches 5.9772 5.9807 5.9841 5.9879 5.9926 5.9942 5.9954 5.9959 5.9964

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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Question

P1. An asphalt concrete cylindrical specimen with a 4-in. diameter and a 6-in. height is subjected
to an axial compressive static load of 150 lb for 1 hour, after which the load is removed. The test
was performed at a temperature of 100°F. The height of the specimen was measured at different
time intervals during loading and unloading for a total of 2 hours and produced the results shown
in Table 1.
0
Time, minutes
2
a. Using a spreadsheet program, plot the stress versus time and the strain versus time on
two separate graphs.
b. How much is the elastic strain?
c. What is the permanent strain at the end of the experiment?
d. What is the phenomenon of the change of specimen height during static loading called?
What is the phenomenon of the change of specimen height during unloading called?
0.01
5
10
20
30
40
50
60
Specimen Height, inches
6.0000
5.9916
5.9870
5.9833
5.9796
5.9753
5.9725
5.9708
5.9696
5.9688
Time, minutes
60.01
62
65
70
80
90
100
110
120
Specimen Height, inches
5.9772
5.9807
5.9841
5.9879
5.9926
5.9942
5.9954
5.9959
5.9964

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