Use of Bottom Ash in Asphalt Mixtures to Hot

2011 World of Coal Ash (WOCA) Conference Abstract – May 9-12, 2011 in Denver, CO, USA
Use of Bottom Ash in Asphalt Mixtures to Hot
Rodrigo C. Weber¹, Suyen Matsumura Nakahara¹, Luciana Rohde¹ and
Jorge Augusto Ceratti¹
1Universidade
Federal do Rio Grande do Sul, 99 Avenida Osvaldo Aranha 3º andar, Porto
Alegre, RS 90035-190, Brasil.
The work presents the bottom ash use as aggregate in the manufacture of asphalt mixtures.
The bottom ash is a deriving residue of the combustion of mineral coal in the production of
electric energy and has generated negative ambient impacts due to the excess of residue
and the lack of control in the disposal of this material in dumps. The mechanical
characteristics of the asphalt mixture with ash had been analyzed through its stability,
resilient modulus, tensile strenght, stripping (Modified Lottman test), weight loss (Cantabro
Methodology), life of fatigue and permanent deformation. A comparison of structures of
flexible pavements with in layers use of this covering mixture was made by means of
mechanistic analyses, taking in account the linear elastic behavior of the materials.
Submitted for consideration in the 2011 World of Coal Ash Conference, May 9-12, 2011.