Section 3: Damage over TrafficAnchor: #i1000477
This section applies to damage that occurs or could occur over vehicular or pedestrian traffic. Damage consists of any spall, delamination, honeycombing, or other unintentional void. The Engineer will typically require additional measures to help ensure the repair material will not fall into traffic in the case of a patch failure.
The most frequent damage that occurs over roadways is overhead vehicular impact. In addition to whatever necessary structural and waterproofing repairs, the Engineer should typically also require confinement or other acceptable means to prevent spalling or to catch portions of the repair material that become detached. Wire netting often works as a temporary solution. More permanent solutions should be included when the member or members are repaired. In almost all cases the best option for preventing damaged concrete from falling onto traffic is to confine the patch material with Carbon Fiber Reinforced Polymer wraps. Perform the CFRP work in accordance with Item 786, “Carbon Fiber Reinforced Polymer.”
In the case of precast concrete fabrication, damage that will occur over traffic may not be patched unless approved by the Engineer. When feasible, members should be reassigned or rotated to move the damage to an area where damage will not occur over traffic in its final configuration. Minor damage may be coated with neat Type VIII epoxy but should not be built up with repair mortar. When the Engineer does permit more extensive repair, the patch material must be confined using CFRP or other approved method.
There is no standard repair procedure for patching damage over traffic. Do not proceed with such repairs without authorization from the Engineer.