Fracture Characteristics of Asphalt Concrete in Mode I, Mode II, and Mixed-Mode

Three mixtures from the full-scale test sections discussed above were used to develop and validate a new Mode II test for asphalt concrete. No previous literature was found that attempted to capture Mode II fracture energy in asphalt concrete, so a test was developed from an extensive review of Mode II tests in the fields of metal, plastic, and PCC. Limited work has been performed in Mixed-Mode testing of asphalt concrete, but only Crack Mouth Opening Displacement (CMOD) was used. This research captured the Crack Tip Opening Displacement (CTOD) and Crack Tip Sliding Displacement (CTSD) in addition to CMOD. This allowed the comparison of three different values of fracture energy, or work, depending on the location and orientation of the data collection gages. Finally, the three asphalt concrete mixtures studied were simulated in Mode I to determine the total external work, with a break down of this work into the dissipated fracture energy, recoverable strain energy, and dissipated creep energy.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Braham, Andrew Franz

Contributors dc:contributor

• William Buttlar

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI3347282

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83382