The Situation Now under construction in the Kendall Square section of Cambridge, 145 Broadway is a 19-story office building that will overlook Boston from across the Charles River. Slated for completion in 2019, the property will feature 10,000 square feet of ground floor retail space, plus a five-story, below-grade parking garage. At the project preconstruction meeting, the general contractor wondered if there was a way to speed up the concrete’s standard 28-day cure time – at least for a split slab section that would sit atop the underground garage and beneath a loading dock behind the building. The area shared a busy throughway around the building and would soon have to support a heavy crane for vertical construction. The general contractor wanted the most durable surfac

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