Journal
ROAD MATERIALS AND PAVEMENT DESIGN
Volume 17, Issue 1, Pages 243-251Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14680629.2015.1058849
Keywords
additives; PMA; ageing; stability
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Funding
- Shanxi province transportation construction projects [2012-2-09]
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Effect of additives dithiodimorpholine (denoted as D) and tetraethylthiuram disulphide (denoted as T) on high-temperature storage stabilities and thermal oxidative ageing performance of SBS-modified asphalt were studied. Considering cost and performance, the content and ratio of D:T should be 0.2% and 1:3, respectively, and the result was confirmed by dynamic shear rheological testing of the samples before and after ageing. Mixtures of SBS-modified asphalt with D and T were prepared by physical high-speed shearing. The thin film oven test was used for simulating thermal degradation during short-term ageing. The results show that appropriate content and ratio of additives D and T can improve anti-ageing properties of SBS-modified asphalts; moreover, the advance of high-temperature storage stabilities of the mixture was significant.
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