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Peak Noise Exposure During Concrete Grinding in Confined Areas



Details

  • Personal Author:
  • Description:
    Objective: This study examined the levels of peak noise exposure during concrete grinding and complemented our previous study that assessed time-weighted-average (TWA) noise exposure for the same type of operation. Methods: Minute-average peak noise levels were measured by a personal noise dosimeter (Spark 705+, Larsen Davis) while concrete grinding was performed in a confined area (an indoor field laboratory) using a variety of grinder types and dust control methods. The total grinding time was 1715 minutes covering 44 grinding scenarios. Results: Overall minute-average peak noise exposure (dBC) during grinding was 113 +/- 5 (mean +/- SD) ranging from 104 -153. Noise exposure was different for 5 main dust control methods: (1) 119 +/- 10 during conventional (no dust control) grinding, (2) 115 +/- 5 during wet-grinding, (3)113+/- 4 when using a Shopvac, (4) 111+/- 3 when using local exhaust ventilation (LEV) - high-efficiency air filter (HEPA) within a tank (LEV-HEPA-tank), and (5) 109 +/- 6 when using LEV-HEPA-cyclone. Noise exposure (dBC) was also different for 3 sizes of grinding-cups (diamond blades) as follow: (1) 115 +/- 5 when using 6 inch (15 cm) diameter grinding-cup, (2) 112 +/- 5 when using 5 inch (12.5 cm), and (3) 111 +/- 5 when using 4 inch (10 cm). Conclusions: The results of this study indicated that the levels of approximately 0.8% of samples exceeded U.S. Occupational Safety and Health Administration (OSHA) criterion of 140 dBC peak noise. The highest level of peak noise was generated when using conventional method and 6 inch grinding cup. It is recommended that the grinding operators should be monitored for peak noise level and protected accordingly. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Publisher:
    American Industrial Hygiene Association
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Abstract or Summary
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    74-75
  • NIOSHTIC Number:
    nn:20054448
  • Citation:
    AIHce 2012: American Industrial Hygiene Conference and Exposition, June 16-21, 2012, Indianapolis, Indiana. Falls Church, VA: American Industrial Hygiene Association, 2012 Jun; :74-75
  • Federal Fiscal Year:
    2012
  • Performing Organization:
    University of Toledo Health Science Campus, Ohio
  • Peer Reviewed:
    False
  • Start Date:
    20050701
  • Source Full Name:
    AIHce 2012: American Industrial Hygiene Conference and Exposition, June 16-21, 2012, Indianapolis, Indiana
  • End Date:
    20250630
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:b8000849e369038e35bd32bab6f09221c80e5d346cbec54af037df899a94b18e71d2549b6de975a3211d54fc06dd15f73fa2e8ca204b68edbbd7c3c13c508765
  • Download URL:
  • File Type:
    Filetype[PDF - 135.31 KB ]
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