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- W388655784 abstract "The Evotherm(r) warm mix process developed by MeadWestvaco is the direct substitution of asphalt binder with a cationic asphalt emulsion. Field trials by McAsphalt in Canada have demonstrated a 30 deg C and 60 deg C reduction in the mixing and compaction temperatures, respectively, when compared to conventional hot mix using the same aggregate and asphalt. A procedure to recover the representative emulsion residue for the Evotherm(r) warm mix system was developed. Here, approximately 80g of Evotherm emulsion is poured into a Thin-Film Oven Test (TFOT) pan and dried in a forced air oven at 80 deg C for 20 hours. Results of conventional and Superpave binder characterization testing demonstrate that the recovery procedure developed here closely simulates the heat history that the Evotherm emulsion is exposed to during mixing and paving in the field and further indicate that pavement constructed using unmodified Evotherm warm mix binder after 10-15 years of in-service life would be as flexible as freshly-placed conventional hot mix pavement. The polymer network formed in the SBR latex-modified Evotherm residue does not prevent oxidation of the asphalt binder, but rather reduces the net effect of undesired changes in rheological properties of the asphalt binder upon age or oxidative hardening. Thus, modification with SBR latex polymer is expected to further prolong the service life of the Evotherm warm mix asphalt pavement. (A) For the covering abstract of this conference see ITRD number E220283." @default.
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- W388655784 date "2007-01-01" @default.
- W388655784 modified "2023-09-27" @default.
- W388655784 title "Characterization of Unmodified and SBR Latex-Modified Evotherm(tm) Warm Mix Binder" @default.
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