Chapter 7: Equipment Inspection
Section 1: Introduction
General
Inspectors of seal coat work must be knowledgeable of the
capabilities and limitations of the equipment. Equipment must be
properly calibrated, well maintained, and functioning correctly
to have a successful seal coat project.
This chapter will provide basic knowledge and general inspection
procedures for the following typical types of equipment:
- Rotary broom
- Asphalt distributor
- Aggregate spreader
- Haul trucks
- Rollers
- Front-end loader
- Heater and storage unit.
A manufacturer’s manual for each piece of equipment should
be available on the project and consulted whenever specific questions
arise.
Provisions for Inspection
The contractor and project engineer typically coordinate the
starting date of the project, and set a date and time for the equipment
to be assembled for inspection. It is advisable to set aside a minimum
of half a day for equipment inspection at least one day before seal
coat work begins. Initial equipment inspection should not be done
the first hour or two of the morning the project begins. Even if
all the equipment was functioning correctly on the last project,
equipment problems can occur during the movement of the equipment.
Plenty of time should be allowed to carefully inspect all equipment,
and to allow more time to correct any discrepancies that are found.
Inspecting for Leaks
All equipment used on the project should be given a thorough
visual inspection for leakage of any substance that might contaminate
the asphalt, aggregate, or prevent adhesion to the pavement surface.
These substances include fuel (both diesel and gasoline), hydraulic
fluid, engine coolant, crankcase oil, and transmission fluid.
Inspecting for leaks is extremely important, not only before
the project begins, but throughout the entire project. If a leak
is detected in any piece of equipment, the equipment should be removed from
the roadway until it is repaired.
Safety
Follow the manufacturer’s safety procedures for inspection
and operation of all equipment.
Additional safety procedures should be followed for any equipment
used for transporting, storing, or applying asphalt materials. Heating
asphalt binder always constitutes some degree of hazard, with the
exception perhaps of emulsions. The most hazardous are cutback asphalts
because of the highly flammable solvents used. Extreme care must
be taken not to allow open flames to come in contact with the asphalt
or the gases from these materials. When working with asphalt cement,
the major safety concern is related to the high temperature of the
binder. Asphalt cement at 300°F can cause very
severe burns. Avoid standing near the asphalt distributor during
heating and operation unless necessary. It is recommended that a
copy of the Material Safety Data Sheet (MSDS) for the binder being
used be kept with the asphalt distributor truck. In addition, refer
to TxDOT’s Handbook of Safe Practices (1997) regarding asphalt heaters,
distributors, and storage.