Slab Warping Affects Pavement Joint Performance
F. N. Hveem
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An investigation of joint troubles and failure is discussed and a method of determining thermal and moisture expansion in thin concrete specimens described. Evidence of warping and curling of pavement slabs and the sequence of events leading to pumping and subsequent faulting of joints are considered. It was evident that curling was due to combined effects of temperature differential and moisture. Profilograph studies of pavement surfaces are described. One solution to pavement failures is the elimination of expansion joints and the spacing of contraction joints as far apart as possible. No practical method is available that will prevent moisture from accumulating beneath the pavement.