01698407

Component

Asphalt and filler interaction plays a key role in the performances of asphalt mastics and mixtures, while the interaction ability of asphalt and filler is in turn affected by the material characteristics. Nowadays, plenty of fine solid waste with extremely different physical and chemical properties have been used as alternative filler to limestone powder. This study analyzed the effects of filler characteristics on asphalt mortar and the feasibility of re-use of the fine solid waste. Firstly, four types of filler (limestone, fly ash, diatomite and red mud) were used to prepare twenty types of asphalt mortar with different fillers to bitumen ratio by volume (0.11, 0.22, 0.33, 0.44, and 0.55). Secondly, the rheological properties of asphalt mortar were examined through Brookfield Viscosity, Superpave high-temperature binder criteria G*/sin δ, and Multiple Stress Creep Recovery. Thirdly, this study investigated the effect of filler type and filler-bitumen ratio (FBv) by volume method to adhesion performance in water and dry condition. Finally, a critical of FBv range was recommended in view of the overall performance. The results indicated that the performance of asphalt mortar with red mud and diatomite exhibited improvement in the high-temperature performance and adhesion ability in case of dry and water conditions. Hence, red mud and diatomite can be used as alternative filler to limestone powder.

This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures.

19-02881

English

0000-0002-8924-6212

5p

2019

Transportation Research Board 98th Annual Meeting

Digital/other

Figures; Photos; References

Asphalt mixtures; Fillers (Materials); Fly ash; Limestone; Mastic asphalt; Rheological properties

Diatomite; Filler content; Red mud

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2019 Paper #19-02881

TRIS, TRB, ATRI

Dec 7 2018 9:38AM