Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Field tests of a water induction nozzle as a dust control for abrasive blasting.

Authors
Heitbrink-WA
Source
Silver Spring, MD: The Center to Protect Workers' Rights, 2007 Jan; :1-29
NIOSHTIC No.
20039995
Abstract
Field tests of a wet abrasive blasting device resulted in significantly lower respirable crystalline silica dust levels than comparable exposure data reported in the literature. The tested device was the water induction nozzle (WIN) (Boride Products), a venturi nozzle in which water is added to the abrasive-air mixture to suppress dust during abrasive blasting. Workers were monitored for silica exposure while performing abrasive blasting on precast concrete, using the WIN and abrasive sand from which the fines had been removed. The monitoring was conducted at Olympian Precast in Redmond, Washington, over a five-day period in September 2006. The geometric mean respirable dust and respirable crystalline silica exposure levels were, respectively, 0.5 and 0.06 mg/m3. These levels are lower by a factor of 7 (for respirable dust) and 4 (for respirable crystalline silica) than exposure data recently reported for construction workers performing dry abrasive blasting. Controlled laboratory testing is needed to quantify the effectiveness of the WIN nozzle in suppressing dust, separate from the dust control provided by the use of abrasive sand with fines removed. Research is also needed to determine recommended water application rates.
Keywords
Dust-collection; Dust-collectors; Dust-control; Dust-control-equipment; Construction; Construction-materials; Construction-workers; Control-systems; Exhaust-hoods; Exhaust-systems; Exhaust-ventilation; Air-flow; Laboratory-testing; Filters; Abrasive-blasting; Abrasives; Silica-dusts; Sand-blasters; Sand-blasting; Testing-equipment; Equipment-operators; Equipment-reliability; Construction-equipment; Respirable-dust; Concretes
Contact
Building and Construction Trades Department,AFL-CIO, CPWR, Suite 1000, 8484 Georgia Ave., Silver Spring, MD 20910
CAS No.
7631-86-9; 14808-60-7
Publication Date
20070101
Document Type
Other
Funding Type
Construction; Cooperative Agreement
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U54-OH-008307
Priority Area
Construction
Source Name
Field Tests of a Water Induction Nozzle as a Dust Control for Abrasive Blasting
State
IA; MD; WA
Performing Organization
Center to Protect Workers' Rights
TOP