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Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt.

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Title:Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt.
Authors:Karr, Grant J.
Contributors:Civil Engineering (department)
Keywords:Hot Mix Asphalt
Asphalt Concrete Fatigue
Asphalt Concrete Performance Testing
Date Issued:May 2018
Publisher:University of Hawaiʻi at Mānoa
Abstract:Despite recent developments, two primary challenges associated with fatigue testing of asphalt
concrete cylinders remain: end failures and applicability to in-situ samples. End failures, or
failure regions developing outside the strain gauge length, occur frequently and significantly
reduce the value of the test. Samples cored from the field are often made up of several
construction lifts ranging from 38 – 150 mm, rendering it incompatible with standard test
cylinder dimensions. This study proposes a modified specimen geometry for use in fatigue
testing of asphalt concrete mixtures which addresses these two challenges. The proposed
configuration is a prismatic specimen which can be sliced horizontally from a cylinder with a
diameter of 150 mm. The dimensions of the specimen are 110 mm long by 100 mm wide with
variable thickness. The specimen width is tapered along the longitudinal axis to encourage
middle failures. Constant crosshead fatigue tests are performed on test specimens as a proof of
Description:M.S. Thesis. University of Hawaiʻi at Mānoa 2018.
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: M.S. - Civil Engineering

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