Rheological effects on bitumen of polyphosphoric acid (PPA) addition

被引：89

作者：

Baldino, Noemi ^{[1
]}

Gabriele, Domenico ^{[1
]}

Lupi, Francesca R. ^{[1
]}

Rossi, Cesare Oliviero ^{[2
]}

Caputo, Paolino ^{[3
]}

Falvo, Thomas ^{[3
]}

机构：

[1] Univ Calabria, Dept Engn Modelling, I-87036 Arcavacata Di Rende, CS, Italy

[2] Univ Calabria, Dept Chem, I-87036 Arcavacata Di Rende, CS, Italy

[3] Star Asphalt SPA Res Lab, I-87010 Saracena, CS, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 40卷

关键词：

Bitumen; Polyphosphoric acid (PPA); Asphaltenes; Rheology; COMMERCIAL WAXES; ASPHALT;

D O I：

10.1016/j.conbuildmat.2012.11.001

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The rheological effects of polyphosphoric acid (PPA) on bituminous binders with similar mechanical and chemical-physical properties, but with different chemical compositions, have been investigated. The effects of polyphosphoric acid were studied through traditional bituminous-binder-type characterization tests and via rheological investigations by dynamic and steady shear rheometry. It was observed that PPA, probably reducing the asphalten aggregate size, extends the range of viscoelastic behavior, moving the transition to a viscous liquid towards higher temperature and, therefore, improving the mechanical behavior for high temperature applications. These effects seem more evident at low PPA concentrations and suggest the potential existence of saturation effects. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：397 / 404

页数：8

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