The authors tested how well various types of ventilation worked at capturing the dust produced by methods currently used for manual concrete surface grinding.

Study Says More Protection Needed for Manual Concrete Grinding

Evaluating the equipment, engineering controls, and grinding methods currently used for manual concrete surface grinding, a study published in JOEH says current methods to control dust aren't sufficiently protective.

Methods currently used to protect workers who manually grind concrete surfaces from dust exposures are not sufficient, a paper published in the December issue of the Journal of Occupational and Environmental Hygiene concludes. Its authors measured silica dust exposure of a volunteer, an experienced grinder who was wearing a powered air-purifying respirator and other PPE, as he ground nine concrete slabs inside a field laboratory equipped with an industrial fan.

The eight authors work at the University of Toledo Department of Public Health & Preventive Medicine (Toledo, Ohio) and CPWR, the Center for Construction Research and Training (Silver Spring, Md.), and this research was funded by NIOSH. They tested how well various types of ventilation worked at capturing the dust produced by methods currently used for manual concrete surface grinding and concluded the resulting dust exposures, if lasting for a full eight-hour day, exceeded ACGIH's recommended silica dust exposure criterion of 0.025 mg/m3.

"This strongly suggests the need for further refinement in the engineering control options and additional administrative controls or the use of respirators," the authors concluded. They said workers should wear air-purifying respirators with protection of at least 10 when using a grinder equipped with local exhaust ventilation; with protection of at least 100 with wet grinding; and 200 (e.g., PAPRs) with uncontrolled grinding.

"There is an urgent need for uniform guidelines for the manufacture and selection of equipment appropriate for manual concrete grinding, the assembly of retrofitted dust control apparatuses, and the maintenance of hand-held angle grinders and the accessories that are commonly used for concrete grinding," they wrote. The paper cites a Bureau of Labor Statistics report that more than 201,730 workers in the United States in 2008 were engaged in concrete grinding using hand and/or power tools.

Download Center

HTML - No Current Item Deck
  • Free Safety Management Software Demo

    IndustrySafe Safety Management Software helps organizations to improve safety by providing a comprehensive toolset of software modules to help businesses identify trouble spots; reduce claims, lost days, OSHA fines; and more.

  • Comply with OSHA’s Electronic Recordkeeping Requirements

    Collect relevant incident data and generate accurate OSHA 300, 300A, and 301 regulatory reports, including 300A CSV files for easy electronic submission to OSHA.

  • Complete Online Safety Training Courses

    Deliver state-of-the art, online safety training courses to your organization with IndustrySafe Training Management Software. Generate reports to track training compliance and automatically notify learners of upcoming or overdue classes.

  • Easy to Use Safety Inspection App

    Conduct inspections on the go with IndustrySafe’s mobile app. Complete safety audits at job sites and remote locations—with or without web access.

  • Track Key Safety Performance Indicators

    IndustrySafe’s Dashboard Module allows organizations to easily track safety KPIs and metrics. Gain increased visibility into your business’ operations and safety data.

  • Industry Safe
comments powered by Disqus