Zobrazeno 1 - 3
of 3
pro vyhledávání: '"William C. Schuster"'
Autor:
Francis P. Miknis, Ryan B. Boysen, Stephen L. Salmans, Michael J. Farrar, Shin-Che Huang, William C. Schuster
Publikováno v:
Journal of Materials in Civil Engineering. 23:628-637
The rheological and chemical properties of hydrated lime-polyphosphoric acid (PPA)–modified asphalt binders before and after laboratory oxidative aging were investigated through dynamic shear rheometer (DSR) and nuclear magnetic resonance (NMR) tes
Publikováno v:
Road Materials and Pavement Design. 12:931-944
Extensive research has been performed to determine the relationship between polyphosphoric acid (PPA) and hydrated lime in bitumen pavement mixes, but the fate of PPA in the paved road has not been determined. Perhaps as important, the mechanism of s
Autor:
Francis P. Miknis, William C. Schuster
Publikováno v:
Road Materials and Pavement Design. 10:815-831
Phosphorous-31 NMR spectroscopy has been used to study the effect of hydrated lime and limestone fines on polyphosphoric acid (PPA)-modified bitumens. NMR spectra were acquired on bitumen samples that were first modified with PPA and on bitumen sampl