1047. 3(h) 1047. 3(j)
a minimum reading of 3,000 pounds per square inch is achieved on a properly calibrated Schmidt hammer every 10 feet of deck longitudinally .
the Representative based on vertical axis bond tests .
24 hours and 72 hours after each day’s placement of the overlay in the presence of the Representative. Perform a minimum of one vertical pull bond test on each bridge or day’s placement, whichever is smaller, at a location or locations as designated. If multiple tests are taken in a span, the test result is the average of the tests for that span. The required minimum bond strength between the PPC overlay and substrate is 250 pounds per s quare inch. If the initial vertical pull bond test results do not meet the minimum requirement of 250 pounds per square inch, perform up to three additional vertical pull bond tests per bridge or day’s placement where the minimum requirement of 250 p ounds per square inch was not met. After additional testing, if the average of the test results for a bridge or day’s placement do not meet the minimum requirement of 250 pounds per s quare inch, the bond between the substrate and PPC overlay in each bridge or day’s placement not meeting this requirement is considered defective work, and the PPC overlay must be removed and replaced at no additional cost to the Department. Repair bond test locations with PPC according to the System Provider’s recommendations .
variations in substrate profile to meet the desired grade and cross -section as indicated. The minimum required thickness is 1 inch. Remove and replace areas where t he minimum required thickness was not attained at no additional cost to the Department.
If PPC overlay exhibits cracking or surface tears, perform an investigation with the Representative to determine the type, source, and extent of cracking. Measure the width, depth, and length of each crack and establish the locations of the ends of each crack with respect to permanent reference points. Coring may be necessary if crack depths cannot be accurately determined using a mechanical probe. If coring is required, obtain two cores at each location or as directed. S ubmit for analysis one core to an independent laboratory and one core to the LTS to determine extent of cra