Visual effects of Mycobacterium ranae on a 135-penetration asphalt (asphalt 1A) are described, which show the texture and rheological characteristics of the asphalt to be modified by microbial action. A bentonite-asphalt emulsion system for asphalts 1A, 3A, and 6A was used to subject these materials to the degradative activity of M. ranae and Nocardia coeliaca for 4 months at 30 C. N. coeliaca caused 1.5-, 3.9-, and 6.8-fold increases in relative viscosity of asphalts 1A, 3A, and 6A, respectively. A similar susceptibility pattern for M. ranae was obtained on the same asphalts, but apparently this organism exerted even a greater effect on asphalt 6A since the viscosity of this residue was too hard to be determined satisfactorily. Comparison of these data with analyses of the three asphalts indicates that the organisms probably attack the resin components of the asphalts.
Mycobacterium ranae on a 135-penetration asphalt (asphalt IA) are described, which show the texture and rheological characteristics of the asphalt to be modified by microbial action. A bentonite-asphalt emulsion system for asphalts 1A, 3A, and 6A was used to subject these materials to the degradative activity of M. ranae and Nocardia coeliaca for 4 months at 30 C. N. coeliaca caused 1.5-, 3.9-, and 6.8-fold increases in relative viscosity of asphalts IA, 3A, and 6A, respectively. A similar susceptibility pattern for M. ranae was obtained on the same asphalts, but apparently this organism exerted even a greater effect on asphalt 6A since the viscosity of this residue was too hard to be determined satisfactorily. Comparison of these data with analyses of the three asphalts indicates that the organisms probably attack the resin components of the asphalts.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.