15 March 2001
CRACK REPAIR EQUIPMENT
9.1. Description. All equipment employed in the crack repair operation must be inspected
before, during, and after the repair project to ensure proper operation of the equipment, safety of
the personnel involved in the project, and potential damage to the pavement due to equipment
problems. Proper safety procedures in accordance with OSHA guidelines and common sense
practices must be followed for the protection of all project personnel. Hand tools should always
be available for working in areas where machinery is not practical or allowed.
All sealant equipment must be equipped with nozzles designed to fill the cracks from the bottom
up. The equipment must be inspected daily prior to application of the sealant and during the
operation to ensure safe operation and that the sealant is being applied properly. If a
two-component sealant is used, the metering ratio must be checked daily.
9.2. Random Crack Saw. Sawing is the preferred method for preparing cracks for sealing. This
device is essentially a concrete saw but has a smaller rear-mounted blade approximately 5 inches
(130 millimeters) in diameter (Figure 9.1.). These saws are generally self-propelled machines
with caster wheels that allow more freedom of movement than an ordinary concrete saw for
following the path of cracks. Diamond blades are typically employed and should be thick enough
to saw the crack to the desired width and prevent warping of the blade during operation.
9.3. Vertical Spindle Router. Cracks may be routed out if a saw is not available. The vertical
spindle router has a vertically mounted router bit and is constructed such that the device can
caster and easily follow the contours of a crack (Figure 9.2.). The bit must be the proper size for
the sealant reservoir and be belt-driven for safety considerations arising from jamming of the bit if