Part 1. Characterization of roadway asphalts by solubility studies. Part 2. Development of concrete applicant organo-functional silanes
Part 1. Solubility profiles describe the chemical constitution of asphalt in terms of internal solubility phenomena. In this study the solubility parameter (r) which is related to hydrogen bonding or associative interactions and the volume dependent solubility parameter (V) which is related to London dispersion forces (non-polar interactions) and the dipole-dipole polar interactions. The plot by the solubility coordinates (r, V) of the solvents and the solubility of the asphalt is termed the solubility profile. Solubility profile data can be related to roadway performance. Roadway asphalt aging can be followed visually and mathematically by the detailed analysis of time-lapsed solubility profiles of roadway core asphalts. The profiles can be used to describe the gross chemical changes without the need to identify or isolate pure substances. This report investigates thirty-two roadway projects constructed between February 1983 and August 1987 which have been monitored for condition and followed by a series of solubility profiles for up to 60 months. Part 2. A variety of organosilanes have been used as applicants to roadway surfaces thereby extending the life or service of the roadway. The aim of this research project is to synthesize and characterize several organosilane compounds with potential concrete roadway applications. Alkyltrialkoxysilanes can be used to stop salt from penetrating concrete and resultant rebar corrosion. The first area this project deals with the optimization of the catalytic synthesis of n-octyltrichloro-and n-decyltrichlorosilane and their alkoxy derivatives. The investigation includes a study of the type and amount of catalyst and a study of varying reaction conditions. The second area of research involves the synthesis and characterization of a set of UV-absorbing/VIS-emitting organosiloxanes. These compounds have potential use as roadway delineation or roadway obstruction demarkation product enhancements.
- Research Organization:
- Oklahoma Univ., Norman, OK (United States)
- OSTI ID:
- 6974441
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ASPHALTS
SOLUBILITY
CONCRETES
SURFACE COATING
ROADS
PERFORMANCE
CHEMICAL COMPOSITION
SERVICE LIFE
SILANES
SILOXANES
BITUMENS
BUILDING MATERIALS
DEPOSITION
HYDRIDES
HYDROGEN COMPOUNDS
LIFETIME
MATERIALS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OTHER ORGANIC COMPOUNDS
SILICON COMPOUNDS
TAR
400201* - Chemical & Physicochemical Properties