AASHTO and ASTM Adopt Ontario Ministry of Transportation Test Method.
MTO's Maintenance Office and Bituminous Section of the Materials Engineering, and Research Office, developed two new laboratory test methods and a field evaluation protocol to ensure that an MTO-designated premium cold mix would meet minimum performance criteria. Specifically, the new methods set the requirements for field handling and performance properties. The protocol calls for at least 75 percent of the mix to remain intact for nine months after placement. All mixes are tested through the critical spring-thaw period. The winter mix met all protocol criteria and exceeded required standards.
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|Date:||Sep 1, 2000|
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