Architect Jeanne Gang said she wanted to use concrete "to its fullest potential" in Chicago's new Aqua Tower. The 82-story high-rise uses glass and irregularly shaped concrete floor slabs that give the building a rippled appearance suggesting waves or rock outcroppings. The flowing shapes serve as balconies for the building. Gang likes concrete because "it can form to any shape, and we wanted to exploit that," she said.
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