Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6724580 | Construction and Building Materials | 2014 | 9 Pages |
Abstract
Cracking in asphalt pavements causes primary failure in structure, with long-term durability issues often related to moisture damage. Fracture resistance and characteristics of asphalt materials significantly affect asphalt pavement service life. Studies have typically considered only mode-I (opening) fracture, but many observations demonstrate the significance of mode-II (sliding) fracture for better design of pavement structures and damage characterization of asphaltic materials. This study presents experimental and numerical efforts to characterize mode-I and mode-II fracture properties of a fine aggregate matrix mixture. To this end, semicircular bending tests were integrated with a digital image correlation system and extended finite element method. With limited scope and test results, this approach shows that mode-II fracture toughness is quite different from mode-I fracture toughness (approximately three times greater than mode-I), clearly indicating that mode-dependent fracture characteristics are necessary in structural design of asphalt pavements with which multiaxial fracture is usually associated.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Soohyok Im, Hoki Ban, Yong-Rak Kim,