For one, there is a certain amount of pre-compaction generated by the paver. These density levels should be in the mid 70s to low 80s. "If the paver is going too fast, density may only be in the mid 60s," says [Wayne Tomlinson]. "Also, if the compactor operator has to speed up to keep pace with the paver, that changes the impact spacing. Either scenario is asking a lot of the compactor operator.
Compaction I Equipment Operator training works to maximize mat quality. Perfect By Kim Berndtson Roller Operation A good paving job will have a smooth, dense appearance that looks flat and tight, without any gaps between the aggre- gates at the surface. Yet, that appear- met in order to maintain quality and productivity,” says Mansell. According to Wayne Tomlinson, training specialist, Volvo Road Institute, operators often retake Sakai’s ExactCompact monitors impact spacing, while Intelligent Compaction plots roller laps. “[Such features] are a great help to the busy roller operator, allowing mat quality and road life. “A good roller operator under- stands the process and what his/ her job is within that process,” says Bruce Monical, marketing manager, ance doesn’t just happen. There are a courses offered through the Institute, him to focus on the job at hand and Hamm Compaction Division. “He/ lot of factors that affect mat quality. in part to get hands-on training, as make changes if necessary by using she can make or break the contrac- The paver operator, the paving well as to get the latest information real-time information,” says Mansell. tor’s ability to achieve final payout. A mix, even the distance from the about what’s happening in the indus- But operators need to be trained good operator can help you; a poorly asphalt plant to the jobsite all play a try. “During the three-day training, on how to use such features in order trained operator can hurt you.” role in achieving optimum mat den- Some of the topics training ses- sity. But the last person to touch the sions focus upon include: pavement is the roller operator. He/ Maintaining proper speed — she is the one who has the greatest Roller speed has one of the greatest influence on smoothness. influences on mat quality. Driving “Over the years, operator perfor- too slow can over compact the sur- mance has become more and more face; driving too fast can leave gaps critical to the bottom-line success and compromise safety if the opera- of most any paving job,” says Todd tor gets too close to the paver. Mansell, technical marketing manager, Using the correct speed will also Sakai America. “With job profits based help to maintain the a
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