Effective Dust Control Systems On Concrete Dowel Drilling Machinery

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Effective dust control systems on concrete dowel drilling machinery.

Steel dowels transfer loads between adjacent concrete pavement slabs park et al 2008 dowel drilling without dust controls can expose workers to respirable silica above applicable exposure limits endangering their health linch 2002. Use of dowel drills indoors or in an enclosed space or drilling materials other than concrete is not covered by table 1. A hepa filtered vacuum must be used when cleaning dust from holes. Through equal numbers of sampling rounds with the control systems randomly selected to be on or off the control systems were found to significantly reduce respirable dust concentrations from a geometric mean of 54 mg per cubic meter to 3 0 mg per cubic meter on one machine and 57 mg per cubic meter to 5 3 mg per cubic meter on the other machine.

During dowel drilling operations use lev or wet control systems to control dust. Valiante et al 2004. Vacuum dust collection system vacuum dust collection system vdcs when drilling concrete outdoors dowel drills need to be equipped with a vdcs. This research shows that the dust control systems can dramatically reduce respirable dust concentrations by over 90 under controlled conditions.

Our high quality concrete drills and dowel drilling machines deliver maximum accuracy so you and your crews can do the job once do it right and move on. To assess the effectiveness of local exhaust ventilation to control respirable crystalline silica exposures to acceptable levels during concrete dowel drilling personal breathing zone samples for respirable dust and crystalline silica were collected while laborers drilled holes 3 5 cm diameter by 36 cm deep in a concrete slab using a single drill slab riding dowel drill equipped with local exhaust ventilation. Do not use equip ment if the dust control system is not working properly. Horizontal drilling of concrete pavement to insert steel dowels is performed in highway and runway construction.

When purchasing dowel drilling equipment opt for dust controls. During dowel drilling operations use lev or wet control systems to control dust. Through equal numbers of sampling rounds with the control systems randomly selected to be on or off the control systems were found to significantly reduce respirable dust concentrations from a geometric mean of 54 mg per cubic meter to 3 0 mg per cubic meter on one machine and 57 mg per cubic meter to 5 3 mg per cubic meter on the other machine. When using large pneumatic drills for dowel drilling shroud lev systems can reduce dust emissions by 87 93.

Always use the dust con trol system and keep it well maintained. When purchasing dowel drilling equipment opt for dust controls. Do not use equipment if the dust control system is not working properly.