Materials for Civil and Construction Engineers (4th Edition)
Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 9, Problem 9.40QP

(a)

To determine

The tensile strength of each specimen

(b)

To determine

The average tensile strength of the conditioned and unconditioned specimen.

(c)

To determine

The tensile strength ratio (TSR).

(d)

To determine

Does the mix pass the super pave criteria for the moisture susceptibility.

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A tension test is being conducted on a steel-rod specimen with a gauge length of L0=2 in and initial diameter of d0=0.5 in. Data were collected to form the conventional stress-strain diagram as shown. From the diagram, f = 74.0 ksi, e = 104.0 ksi , g = 85.0 ksi , and h = 0.15 in/in. Assuming that the strain remains constant throughout the region between the gauge points, determine the nominal strain ε experienced by the rod if it is elongated to L = 2.7 in . Assuming that the stress is constant over the cross-sectional area and if the tension force used is P = 11.0 kips, find the nominal stress experienced by the rod. Determine the force P needed to reach the ultimate stress in the steel-rod specimen.
Using the AASHTO T 283 test, three HMA specimens were freeze–thaw conditioned and three were unconditioned. All the specimens had a diameter of 150 mm. Table shows the thickness and load at failure of each specimen. Determine:a. The tensile strength of each specimen in MPa.b. The average tensile strength of the conditioned and unconditionedspecimens.c. The tensile strength ratio (TSR).d. Does the mix pass the Superpave criteria for moisture susceptibility?
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