Current demand from transportation agencies for construction and maintenance of their pavement network requires the use of large amounts of aggregate. Diminishing reserves of aggregate and environmental regulations for new aggregate extraction sites restricts the use of standard aggregates and encourages the use of recycled materials. This paper investigates the suitability of using taconite aggregates, a byproduct of taconite mining industries, for construction of asphalt pavements by evaluating the mechanical performance of asphalt mixtures prepared with taconite aggregates. The experimental work is performed by means of the semi-circular bending test (SCB), the indirect tensile test (IDT), dynamic modulus (E*) test, and the thermal stress restrained specimen test (TSRST) with acoustic emission monitoring. The results indicate that, in general, the mixtures prepared with taconite aggregates perform slightly better than the mixtures prepared with standard aggregates.
|Original language||English (US)|
|Number of pages||9|
|Journal||Construction and Building Materials|
|State||Published - Sep 2009|
Bibliographical noteFunding Information:
The support provided by the Natural Resources Research Institute (NRRI) as part of a grant from the US Department of Commerce, Economic Development Administration is gratefully acknowledged.
- Acoustic emission
- Asphalt mixtures
- Dynamic modulus
- Indirect tensile test
- Recycled materials
- Semi-circular bending test