http://www.diva-portal.org/smash/get/diva2:711917/FULLTEXT01

Polymer modification of bitumen : Advances and challenges

https://arpi.unipi.it/bitstream/11568/798598/2/polacco%20798598.pdf

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Morphology, rheology, and physical properties of polymer-modified asphalt binders

The use of polymer modified asphalts for waterproofing and in road pavement has been continually increasing worldwide, because a relatively small quantity of added polymer can significantly enhance performance and durability. The knowledge of the morphological structure of such materials is still incomplete and controversial, mainly because of the compositional complexity. In practice, rheology is one of the most useful tools for the study of polymer modified asphalt. Particularly, nonlinear rheology may give unique information that helps to interpret how the polymer organizes when it is blended with asphalt. In this paper, besides a brief description of linear rheological properties and modeling, particular attention is paid to the most recent studies on the structure and to material functions, such as shear viscosity and relaxation modulus in the nonlinear viscoelastic region. The correlation of nonlinear behavior with polymer characteristics and with the architecture established when polymers are blended with asphalts is then described.

Relation between polymer architecture and nonlinear viscoelastic behavior of modified asphalts

Asphalt modification with different polyethylene-based polymers

Production of stable polypropylene-modified bitumens

A new cleaning method for historic stained glass windows

Originally extended over 6500 square metres, the Basilica of Maxentius was one of the biggest and most outstanding buildings of Roman architecture. Only one third of the monument is still standing. In celebration of the Christian Holy Year of 2000 (the Jubilee), the Soprintendenza Archeologica di Roma (SAR) started an extended project with the purpose of restoring the terrace and of studying the structural problems of the monument. CISTeC was appointed to the structural part of the project, including the study of the foundations and the proposal for the consolidation project.The present paper reports the conclusions of the static and dynamic studies that were carried out both on the present-day Basilica and on the model of the original basilica. The results concluded that the monument could be subjected to seismic risks. Following such conclusions, a provisional consolidation project (which is currently in progress) and three final consolidation proposals were submitted to SAR. The immediate appli...

M. Laura Santarelli

Papers

Production of stable polypropylene-modified bitumens

A new cleaning method for historic stained glass windows

Stability and conservation of the Maxentius Basilica in the Roman Forum