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Abstract:This study was oriented toward slabjacking procedures for raising slabs and filling voids on roadways, with emphasis on louisiana materials and equipment. The conclusions were: (1) holes should be about 1 1/4 inches in diameter, spaced 6 feet apart and no closer than 18 inches to edges or joints, (2) a slurry mix made up of 4 bags of cement per cubic yard of an a-4 soil with a wetting agent added to the water should be used, (3) jacking should start at the area of least lift with the lifting being not more than 1/4 inch in any one place prior to changing location, (4) jacking should be completed on parallel slabs in adjacent lanes as close to the same time as possible, and (5) jacking should be initiated using a fairly thick slurry and thinned until good hole-to-hole travel is obtained as soon as lifting begins.
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