What question did this study set out to answer?

To characterize the low-temperature oxidation kinetics and carbonyl formation behavior across multiple asphalt types to evaluate pavement hardening mechanisms.

April 1, 1996AIChE Journal

The kinetics of carbonyl formation in asphalt

View Full Paper

Ask AI

Bookmark

Authors

MLMeng LiuTianjin University of Commerce KLK M LunsfordValero Energy (United States)RDR. R. DavisonCanterbury Christ Church University

Discussion

Member takes

Implication

Kinetic analysis reveals two-stage oxidation across 14 asphalt types, suggesting single-temperature testing misrepresents road-hardening rates.

Key Points

To characterize the low-temperature oxidation kinetics and carbonyl formation behavior across multiple asphalt types to evaluate pavement hardening mechanisms.
Measured oxidation kinetics across 14 asphalt samples at constant temperatures and constant oxygen pressures.
Determined activation energies and reaction orders with respect to oxygen pressure across distinct oxidation regimes.
Identified two consecutive oxidation regimes: an initial rapid-rate period followed by an extended constant-rate period.
Found activation energies in the constant-rate region ranging from 64 to 109 kJ/mol and reaction orders from 0.25 to 0.61, segregating asphalts into two distinct kinetic groups.
Identified an isokinetic temperature near 100°C and demonstrated an inverse relationship between initial oxidation extent and constant-rate oxygen reaction order.

Cite This Study

Liu et al. (1996) studied this question.

synapsesocial.com/papers/6aa0293bc08899ae75b577c4 https://doi.org/10.1002/aic.690420417

View Full Paper

Ask AI

Bookmark

Implication

Kinetic analysis reveals two-stage oxidation across 14 asphalt types, suggesting single-temperature testing misrepresents road-hardening rates.

The kinetics of carbonyl formation in asphalt

Discussion

Member takes

Implication

Key Points

Cite This Study

The kinetics of carbonyl formation in asphalt

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider