Concrete Products

SEP 2017

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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10 • September 2017 www.concreteproducts.com GOVERNMENT AFFAIRS REGULATIONS filter remove 99.97 percent of particles with a size of three microns or less. HEPA filters are expensive, but necessary for removing small particles. When looking for a HEPA vacuum filter that meets OSHA requirements, it must state on the filter that it will remove particles three microns in size or less. As a filter removes smaller and smaller particles, the power and airflow of the vacuum, as measured in cubic feet per minute (cfm), must increase. How do you clean these specialty filters to make sure the vacuum still functions properly? OSHA requires vacuum filters to func - tion properly at all times. For vacuums intended for concrete/fine dust collec- tion, certain vacs provide a feature that automatically cleans the filter every 15 seconds with reverse blasts of air (Bosch standard) to ensure the filter maintains its utility. Other manufacturers employ different filter-cleaning methods. Filters should never be washed out, especially when concrete dust is involved because it will harden in the pores and render the filter useless. Bosch Speed Clean bits are built around an internal dust channel that's milled to deliver dust reduction in a lightweight concrete bit. These bits are both OSHA and code approved for use with epoxy anchors. In addition, employers must create processes that minimize release of respirable silica dust into the environment during maintenance of tools and employee change of work clothes.

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