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Measurements of the effectiveness of dust control on cut-off saws used in the construction industry.
Ann Occup Hyg. 1999 Oct; 43(7):443-56.AO

Abstract

Materials used in the construction industry frequently contain large quantities of silica. When they are cut or shaped with power tools considerable respirable dust can be produced. Three dust control systems for use with cut-off saws have been evaluated on site: wet dust suppression using mains water, the same system using water from a portable water tank, and local exhaust ventilation. The efficiency of water suppression on cut-off saws has been precisely quantified in controlled laboratory conditions by means of measurements with and without dust control. When dust control was used on-site, the mean concentrations of airborne silica were reduced by a factor of between three and seven, the accuracy being limited by the relatively high limit of detection for silica. All controls systems generally reduced respirable dust levels by at least 90%. Although the effectiveness of dust suppression did not depend on blade type, a diamond blade was more effective than a resin-bonded blade with the pressurised water system; cutting a slab with this type of blade could be completed before the water tank required repressurization. In laboratory tests, the application of water reduced the dust concentration to < 4% of its value without control. The method for monitoring the dust concentration was sufficiently sensitive to measure a difference in concentration produced during cutting in different directions. It is important, however, that the pressure in supply reservoirs is properly maintained, that the water is correctly applied and that it is used at the correct rate. If this is done effective dust control can be achieved.

Authors+Show Affiliations

Health and Safety Laboratory, Sheffield, UK.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

10582028

Citation

Thorpe, A, et al. "Measurements of the Effectiveness of Dust Control On Cut-off Saws Used in the Construction Industry." The Annals of Occupational Hygiene, vol. 43, no. 7, 1999, pp. 443-56.
Thorpe A, Ritchie AS, Gibson MJ, et al. Measurements of the effectiveness of dust control on cut-off saws used in the construction industry. Ann Occup Hyg. 1999;43(7):443-56.
Thorpe, A., Ritchie, A. S., Gibson, M. J., & Brown, R. C. (1999). Measurements of the effectiveness of dust control on cut-off saws used in the construction industry. The Annals of Occupational Hygiene, 43(7), 443-56.
Thorpe A, et al. Measurements of the Effectiveness of Dust Control On Cut-off Saws Used in the Construction Industry. Ann Occup Hyg. 1999;43(7):443-56. PubMed PMID: 10582028.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Measurements of the effectiveness of dust control on cut-off saws used in the construction industry. AU - Thorpe,A, AU - Ritchie,A S, AU - Gibson,M J, AU - Brown,R C, PY - 1999/12/3/pubmed PY - 1999/12/3/medline PY - 1999/12/3/entrez SP - 443 EP - 56 JF - The Annals of occupational hygiene JO - Ann Occup Hyg VL - 43 IS - 7 N2 - Materials used in the construction industry frequently contain large quantities of silica. When they are cut or shaped with power tools considerable respirable dust can be produced. Three dust control systems for use with cut-off saws have been evaluated on site: wet dust suppression using mains water, the same system using water from a portable water tank, and local exhaust ventilation. The efficiency of water suppression on cut-off saws has been precisely quantified in controlled laboratory conditions by means of measurements with and without dust control. When dust control was used on-site, the mean concentrations of airborne silica were reduced by a factor of between three and seven, the accuracy being limited by the relatively high limit of detection for silica. All controls systems generally reduced respirable dust levels by at least 90%. Although the effectiveness of dust suppression did not depend on blade type, a diamond blade was more effective than a resin-bonded blade with the pressurised water system; cutting a slab with this type of blade could be completed before the water tank required repressurization. In laboratory tests, the application of water reduced the dust concentration to < 4% of its value without control. The method for monitoring the dust concentration was sufficiently sensitive to measure a difference in concentration produced during cutting in different directions. It is important, however, that the pressure in supply reservoirs is properly maintained, that the water is correctly applied and that it is used at the correct rate. If this is done effective dust control can be achieved. SN - 0003-4878 UR - https://www.unboundmedicine.com/medline/citation/10582028/Measurements_of_the_effectiveness_of_dust_control_on_cut_off_saws_used_in_the_construction_industry_ L2 - https://medlineplus.gov/occupationalhealth.html DB - PRIME DP - Unbound Medicine ER -