Synergistic Effect of 4A Zeolite from Rice Husk Ash without Aging Time and Silane on the Adhesion Properties of a Warm Mix Asphalt

• Autor(a) principal: Arroyo-Martínez,Paula C.
• Data de Publicação: 2018
• Outros Autores: Sánchez-Flores,Norma A., Villafuerte-Castrejón,María E., Vivar-Ocampo,Rodrigo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532018000100058
• topic: 4A zeolite; rice husk ash; microwave-assisted synthesis; aging time; warm mix asphalt additives

4A Zeolite was synthesized using rice husk ash (RHA) as a raw material in a microwave-assisted hydrothermal synthesis. Two new procedures were proposed: procedure A, using RHA as the raw material, and procedure B, using the depolymerized RHA. Both procedures were performed using microwave-assisted hydrothermal synthesis, and neither synthesis required an aging time. Crystallinities of over 90 and 80% were reached at 100 ºC after 30 min of microwave heating for procedures A and B, respectively. The obtained zeolites were used as warm mix asphalt additives, and the performance of the zeolite obtained from procedure A was better. Additionally, the zeolite obtained from procedure A and commercial silane were used separately as asphalt-aggregate adhesion promoter. An increase in the adhesion percentage from 30% of a blank sample to 94% was observed.