MURFREESBORO, Tenn. — We walk on it, drive on it. It spans rivers, holds back dams, serves as the foundation for skyscrapers, shopping centers and homes. Concrete cracks because, like all materials, ...
Students were hammering on a wooden trapezoid form to make the concrete they had just poured into it settle when disaster struck: The screws on one piece of the form tore free from another piece, ...
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