2016-11-07-COD-min - Laserfiche WebLink

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Commission on Disability Sub - Committee Minutes — November 7, 2016 Members Present: Victoria Buckley, Chair; Michael Martignetti, Shaun Grady Town Liaisons: Linda Vine, Deputy Town Manager; Joe Pato, Selectman; Dave Cannon, Assistant Town Engineer; David Pinsonneault, Public Works Director Guest Speaker: Craig Dauphinais, Massachusetts Concrete & Aggregate Producers Association (MaCAPA) - Presentation about Sidewalk Materials Residents: Bob Adams (HDC), Nancy Adler, Joel Adler, Elizabeth Brach, Fred Johnson, John Frey (Tree Committee), Maura Redmond [Douglas House (DH)], John Long (DH), Steve Alibrandi (DH), Cynthia Janik (DH Program Manager), George Burnell Meeting was set up to hear Craig Dauphinais speak about concrete. It was intended to be a sub - committee meeting open to the public and to the Center Streetscape Ad Hoc Committee. Craig's organization represents concrete and aggregate producers and other ready mix suppliers, and their role is related to outreach and education. He has worked in the field at all levels for over 29 years. He is a selectman in Grafton. He discussed concrete qualities: • versatile — designs, colors, finishes • durable — resists freeze -thaw cycles and salts, resists loads • strong — up to 40K psi • rigid pavement, cool, bright (energy - efficient) • very low maintenance and life cycle cost benefits — if done right • modern technology To demonstrate longevity of concrete he showed photos of schools in Grafton, intersection in Lancaster NY, sidewalks in Rochester and Mount Morris. Dave Cannon DPW said East Lexington sidewalks are old concrete in good shape. Concrete joints include: isolation joints — around poles etc; expansion joints; construction joints — wider, with pins; control joints — hand - tooled are tool joints and there are cut ones as well — to tell the concrete where to crack. Craig talked about the "90- minute rule" — which means from the time cement is mixed until it is installed. Temperature guides whether mixture is ready. More water is used in base if sandy. Fiber mesh in mix helps with shrinkage and cracking. There is a chemical spray surface retardant that helps concrete set evenly.