Preparation and properties of modified asphalt using branch SBS/nanoclay nanocomposite as a modifier. Issue 6 (18th August 2019)

• Record Type: Journal Article
• Authors: Martínez-Anzures, Jesús Daniel; Zapién-Castillo, Samuel; Salazar-Cruz, Beatriz Adriana; Rivera-Armenta, José Luis; Antonio-Cruz, Rocio del Carmen; Hernández-Zamora, Gabriel; Méndez-Hernández, María Leonor
• Is Part Of: Road materials and pavement design. Volume 20:Issue 6(2019)
• Page Start: 1275
• Page End: 1290
• Publication Date: 2019-08-18
• Subjects: rheological properties -- branch SBS -- master curves -- nanocomposite; Road materials -- Periodicals; Highway engineering -- Periodicals; Pavements -- Design and construction -- Periodicals; 625.805
• DOI: 10.1080/14680629.2018.1441062
• Languages: English
• ISSNs: 1468-0629

Abstract

Abstract : The use of Closite 15A and a triblock copolymer branch type (BP) as asphalt modifiers was studied. Modified asphalt binder was prepared by adding nanocomposites (NCs) of styrene–butadiene–styrene copolymer (BP) and Cloisite 15 A (NCMM). The NCs were obtained by means of a melt mixing technique. The morphology of the modified asphalt blends was observed via fluorescence microscopy, which revealed a good dispersion pattern of NCMM into the asphalt binder, and explains to a considerable extent, their final rheological behaviour. The modified asphalts exhibited a relatively high complex modulus compared to the unmodified asphalt and, as a consequence displayed enhanced viscoelastic properties. NCMM increased slightly both the softening point and the viscosity of the modified asphalts at elevated temperatures, and had a compatibilising effect on them, which was shown as an improvement of their storage stability.