Changsha Huanghua Airport Runway Overlay of Asphalt Concrete Mixture Optimization
SMA asphalt mixture is the old airport pavement overlay of asphalt concrete most commonly used technical solutions, combined with the previous runway coagulation Concrete Asphalt design, from the perspective of Asphalt Mixture Design. Laboratory produced using different asphalt modifier, additives (fiber, anti-rutting agent) to form several SMA asphalt mixture. Laboratory tests are to be determined each program's conventional indicators, such as pavement rutting performance. Analysis of test results, the final mixture is to be determined the optimal program. The results showed that SBS star relative linear modifier better road performance, the selection of PAN fiber than the lignin additive mixture of additives on the adhesion, crack resistance, resistance to water damaging have a larger increase, which for the SMA in the application of the runway asphalt concrete pavement to provide a basis for improvement.
Evaluation of Recycled Projects for Performance
iii IMPLEMENTATION STATEMENT iv LIST OF TABLES vi LIST OF FIGURES vi
QUALITY CONTROL OF RECYCLED ASPHALTIC CONCRETE
This study examined the variations found in recycled asphaltic concrete mix based upon plant quality control data and verification testing. The data was collected from four recycled hot-mix projects constructed in 1981. All plant control and acceptance data was statistically analyzed. Samples of recycled hot mix and reclaimed material were tested and analyzed in the research laboratory to resolve possible conflicts in the plant data. The recycled asphaltic concrete variation was examined with respect to that of the state's conventional asphaltic concrete. Additionally, the quality of the recycled mix's asphalt cement as measured by absolute viscosity was examined with respect to a predictive equation. It was found that variations in recycled mixtures were similar to those of conventional hot mix for all control and acceptance testing. The quality of the asphalt cement in the recycled mix was similar to results anticipated by the prediction equation. (FHWA)