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Antunes, V., A. C. Freire, L. Quaresma, and R. Micaelo. "Effect of the chemical composition of fillers in the filler–bitumen interaction." Construction and Building Materials. 104 (2016): 85-91. AbstractWebsite
Micaelo, Rui, Jaime Ribeiro, Maria Azevedo, and Nuno Azevedo. "Estudo da Compactação de Misturas Betuminosas: Ensaios de Campo e Modelação Numérica." XV Congresso Ibero-Latinoamericano do Asfalto. Lisbon, Portugal: UC & UM, 2009.
Micaelo, Rui, and André Soares Estudo da Possibilidade de Ocorrência de Hidroplanagem em Estradas Portuguesas. XVI Congresso Ibero-Latinoamericano do Asfalto. Rio Janeiro, Brasil: IBP, 2011.
Antunes, V., A. C. Freire, L. Quaresma, and R. Micaelo. "Evaluation of waste materials as alternative sources of filler in asphalt mixtures." Materials and Structures. 50 (2017): 254. AbstractWebsite

There are many different ways to reduce the construction industry's impact on environment. The incorporation of waste in the fabrication of construction materials may be beneficial for both the waste management sector and the construction industry. The aim of this research was to investigate the use of three different waste materials (construction and demolition waste, brick powder and fly ash) as filler in asphalt mixtures. Limestone filler was used as reference material. The materials were characterized in terms of their geometrical, physical and chemical properties, and the interaction with bitumen was assessed with two mastic test methods using four different bitumens. The specific surface of waste materials shows a wide-ranging variation due to material specific shape and texture of particles. However, the Rigden voids and bitumen number tests adequately measure the stiffening effect of these materials. The delta ring and ball test results showed there is a good relation with the filler content when the results are affected by the bitumen type. The f/b ratio for a specific bitumen–filler combination can be determined from the maximum filler-to-bitumen ratio and the recommended stiffening increase. The mastics with these waste materials showed strong resistance to water damage.

Pereira, L., A. C. Freire, M. Sá da Costa, V. Antunes, L. Quaresma, and R. Micaelo. "Experimental study of the effect of filler on the ductility of filler-bitumen mastics." Construction and Building Materials. 189 (2018): 1045-1053. AbstractWebsite