Abstract
The viscosity criteria and methodology to estimate the optimum compaction temperatures (OCTs) of polymer modified asphalt binders were studied by statistical analysis. Results showed that the viscosity corresponding to the OCTs came from a lognormal distribution. A mode of 0.52Pas and a range of 0.38–0.75Pas were suggested as the viscosity criteria. A quadratic fit method was proposed, which provided a rational means to estimate the OCTs. Comparing to the compaction temperatures of 10°C off the OCTs, compaction energy can be reduced by 7.7% on average by compacting the asphalt mixtures at the OCTs.
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