Civil infrastructure company, Green Infrastructure Partners Inc. (GIP), has entered an agreement with Aecon Group Inc. to acquire its Aecon Transportation East (ATE) roadbuilding services, aggregates, and other materials supply businesses, and expand its breadth of operations in Ontario.
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A new study by the Toronto and Area Road Builders Association (TARBA) finds many municipalities in Ontario have policies prohibiting or severely limiting the use of recycled asphalt and concrete in road construction and other public works.
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For more than two millennia, asphalt bitumen has been used as a key raw component in the construction industry. Long before the first oil refinery produced its first barrel of asphalt, builders and waterproofers used natural sources of asphalt for various applications.
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An ASTM International committee, D08 on Roofing and Waterproofing, is developing a standard for two asphalt products that will help reduce air emissions, save energy, and benefit workers by lowering their exposure to asphalt fumes.
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Until recently, using asphalt to adhere roofing materials was likely the most popular attachment method. It was used for everything, from vapour retarders and insulation, to the thermal barrier and cover board. Even roof membranes were bonded in asphalt—the first ply of a two-ply modified bitumen (mod-bit) roof membrane or the entire four-ply ‘tar-and-gravel’ system got their share.
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