Concrete Products

AUG 2018

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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Page 56 of 71 August 2018 • 55 INNOVATIONS REPORT ENVIRONMENTAL Users need to check tool and equipment specs to ensure compliance with silica dust extraction and disposal. Are HEPA filters required in Table 1? "HEPA" filters are not required. The OSHA Silica Dust Regulation – Table 1, states that a filter needs to have 99 percent filtration to meet the guideline. Many non-HEPA filters meet this standard, but may not withstand the frequency of dust extractor filter clean- ing that's required due to fineness of silica dust clogging the filter (if not cleaned often). Use a HEPA filter since 1) OSHA agents know its filtration is rated 99 percent effective; 2) it offers greater durability versus a standard filter; and, 3) it saves money in the long term. Is there a limit for length of a vacuum hose? Bosch dust extractors can be used with either a 10-ft. hose (which comes with the unit) or a 16-ft. version (sold separately). Beyond 16 feet, the expected efficiency of the dust extractor decreases greatly; users may have dust control performance issues beyond that length. What about jobsite dust from surrounding work areas? How can this be distinguished from cutting/grinding operations? Dust generated in and around the jobsite must be compliant with the established control plan for that site. Levels that exceed the dust control plan should be reported immediately. It doesn't matter who creates the dust, every- one must be safe from exposure. Moisture Measurement Probes you've been waiting for... Measure ALL your aggregates - Sand, Gravel, Stone • SONO probes deliver dependable moisture values for every aggregate, every batch! • Accurate, reliable, no maintenance • Simple to install and quick to integrate (508) 655-6372 - -

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