FP-96 English Version - Eastern Federal Lands Highway Division

Section 502Produce a surface texture consisting of parallel grooves 0.11±0.02 incheswide. Provide an area between the grooves 0.085±0.025 inches, and a differencebetween the peaks of the ridges and the bottom of the grooves of approximately0.0625 inches.Test the ground pavement surfaces for pavement smoothness according toSubsection 501.12(b). Check transverse joints and random cracks with a10-foot straightedge. Misalignment of surface planes on adjacent sides of thejoints or cracks and between each grinding pass shall be less than 0.0625inches. The transverse slope of the pavement shall have no depressions orslope misalignment greater than 0.25 inches in 10 feet tested perpendicular tothe centerline. Straightedge requirements do not apply across longitudinaljoints or outside of ground areas.502.10 Fracturing Concrete Pavement. This work consists of fracturingexisting concrete pavement and firmly seating or compacting the pavementbefore a pavement overlay. Use one of the following methods:(a) Crack and seat. Crack the existing concrete pavement into full-depthhairline cracks with pieces approximately 18 to 36 inches in size. Seat thepieces firmly into the foundation.(b) Break and seat. Break the existing concrete pavement into full-depthhairline cracks with pieces approximately 16 to 24 inches in size. Rupturethe reinforcement or break the concrete bond and seat the pieces firmly intothe foundation.(c) Rubblize and compact. Completely fracture the existing pavement intopieces approximately 2 to 6 inches in size. Remove exposed reinforcingsteel and wire mesh. Compact the pieces into a layer.The CO will designate a test section. Fracture the test section using varyingenergy and striking heights to establish a satisfactory evenly distributed crackpattern. Obtain 6 inch diameter pavement cores at 10 designated locationsover the cracks to verify that the cracks are full depth.When fracturing a test section, furnish and apply water to dampen the pavementfollowing fracturing to enhance visual determination of the fracturingpattern. Furnish and apply water to a checked section at least once a day toverify that a satisfactory fracture pattern is maintained. If approved, adjust theenergy and/or striking height based on check sections.348