Document Type : Original Article
Authors
1
Associate Prof., Dept. of Public Works Eng., Faculty of Engineering, Tanta University, Egypt
2
Assistant Lecturer, Dept. of Public Works Eng., Faculty of Engineering, Tanta University, Egypt
3
3 Assistant Prof., Dept. of Civil Eng., Faculty of Engineering, Suez University, Egypt
Abstract
In recent years, the using of modifiers was used to improve the performance of asphalt
binder and asphalt mixtures. In this research, metakaolin material is investigated as an
additive to modify asphalt cement properties. A comparative test program was
conducted on asphalt binders and asphalt mixtures to assess the effects of nano
metakaolin (NMK) material on pavement performance. The NMK material was used
instead of part of the asphalt binder with different percentages (0%, 2%, 4%, 6%, 8%,
and 10%) by weight. A number of basic tests were conducted on asphalt binder such as
the penetration, softening point, flash point, and absolute viscosity tests. Furthermore,
standard Marshall, loss of stability, and rutting tests were carried out on asphalt
mixtures. The results indicated that the physical properties of the modified asphalt
binder with NMK material were improved. Moreover, the use of NMK material has
greatly affected the pavement resistance to deformation. Finally, using the NMK
material with a percentage of 6% by weight of asphalt binder achieved a greater
improvement in the mechanical properties of the modified mixtures
Keywords
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