Evaluating the dynamic stabilities of asphalt concrete mixtures incorporating plasterboard wastes

Abstract

This study aims at investigating the impact of recycling by-product plasterboard wastes (gypsum and bassanite) with asphalt mixtures by replacing partly the filler portion of the asphalt mixtures with pulverised plasterboard wastes in order to contribute to non-toxic and good urban environment on one hand and improve, or at least retain, the design mechanical properties of the resulting asphalt concrete mixture on the other. The study was based on series of wheel tracking tests which successfully proved the possibility of mixing recycled plasterboard wastes with asphalt mixtures. The tests results showed that asphalt samples of 40% gypsum-filler ratio and asphalt samples of 40% bassanite-filler ratio as well gave the maximum resistance to plastic deformations and hence maximum dynamic stabilities. As a result, this research has shown that mixing of plasterboard wastes with asphalt concrete mixtures in specific quantities is promising.

Keywords::

• asphalt concrete mixtures
• bassanite
• dynamic stability
• gypsum
• plasterboard wastes
• rut depth
• wheel tracking test

Acknowledgements

The authors would like to express their gratitude to Mr Gaku Matsunaga, former M.Sc. student at Fukuoka University, for his help in carrying out the experimental work of this research.

Additional information

Funding

This work was supported by Nippo Asphalt Company/Fukuoka branch in Japan.