CoatingsPro Magazine Supplements

Concrete Dec 2017

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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COATINGSPRO CONCRETE COVERED 2017 9 solvent-based products." Meanwhile, the U.S. Occupational Safety and Health Administration (OSHA) issued sweeping regulatory changes aimed at more stringent controls on respirable crystalline silica dust generated in construction operations. " W hi le the reg u lation just went into ef fect in September 2017, manufacturers a lready have or are work ing to introduce new products or mod if ications to ex isting units to comply w ith the new, reduced per missible ex posure limit (PEL)," said Jan Wienczkowsk i, marketing manager for Genera l Equipment, which of fers products such as por table vacuums and air f i lters to assist w ith these cha l lenges. "Pr ior PEL limits have been reduced by 80 percent f rom 250 to 50 μg /m 3 [7.1 to 1.4 μg /f t.³] of air. In order to meet this requirement, a highly ef f icient HEPA [ high ef f icienc y par ticu late air] f i ltration system dow n to 0.3 microns [0.01 mi ls] is needed." In response to these changes, 3M launched a new silica respiratory solutions product line with different offerings available for each maximum use concentration level. Power tool manufacturers, such as Bosch, are also helping through the development of products to remove dust as it is created through the use of shroud attachments for grinders and dust extraction attachments that fit around chipping hammer bits and hammer drill bits. Besides forcing changes at the manufacturer level, Wienczkowski said the regulation is placing greater responsibility on contractors to identif y situations that can produce silica dust and provide both written exposure plans and training to ensure that the plans are followed and that worker exposure to silica dust remains at or below the PEL. "Channel members from the manufacturer to the contractor now have to take into consideration offering or having to purchase additional equipment in order to comply w ith the regulator y changes," Wienczkowski said. " T he good news is that the majority of equipment that is needed to control silica dust and minimize employee exposure already exists in the marketplace today. With just a little homework, a seemingly over whelming subject can be simpli- fied and overcome." Contractors can turn to industry organizations, such as the American Concrete Institute (ACI), International Concrete Repair Institute (ICRI), Tilt-Up Concrete Association, NACE International, and the Society for Protective Coatings (SSPC), for further guidance on the latest standards and best practices. ese groups also offer training and educational resources. Moisture Measurement With safety precautions in place, one of the first steps in the job process is to understand the complicated relationship between concrete and water. ough water is added to the cement, sand, and aggregate mixture to form a bond, it is vital for the construction water to have evaporated enough to allow the substrate to be handled or to receive new coverings, which can be sensitive to moisture. " To prevent costly mistakes, take the time to understand Cementing Success As with all construction and coating-related projects, safety is first. In response to a regulation update to the permissible exposure limit (PEL) regarding silica dust, for example, companies such as 3M have released complying products.

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