Rock Products 120th Anniversary – Part 5

IN THIS SPECIAL YEAR-LONG SERIES CELEBRATING OUR 120TH YEAR PUBLISHING MILESTONE, ROCK PRODUCTS PRESENTS A HISTORY OF THE AGGREGATES INDUSTRY. In This Issue, We Cover The Years 1940-1949. In 1939, German troops entered Poland to begin a string of seemingly unstoppable invasions that extended German Dictator Adolph Hitler’s control over much of eastern and western Europe. It was the start…

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Beyond Assessment:

HELMET-CAM TECHNOLOGY INFLUENCING DUST EXPOSURE AWARENESS AND RESPONSE. By Emily J. Haas and Andrew B. Cecala Exposure to respirable dust, and especially dust containing crystalline silica, continues to be a serious health concern for our nation’s miners. Despite constant advances to lower respirable dust exposures, miners still experience periods of elevated exposure while performing their jobs. A joint venture several…

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A Better Blend

A.F. GELHAR DIVERSIFIES TO PRODUCE SILICA SAND FOR USE AS FRAC SAND. By Mark S. Kuhar Since 1919, A.F. Gelhar Co. Inc., in Markesan, Wis., has flourished by providing silica sand to foundries throughout Wisconsin. In 2009, the company realized it was in a prime position to take advantage of the growing demand for silica sand to use in hydraulic…

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First Look – November 2015

TOP NEWS ConExpo Latin America Has Strong Debut More than 32,000 people attended ConExpo Latin America, walking through 40,000 sq. meters of exhibits from 300 manufacturers; and taking advantage of educational opportunities such as Rock Products’ aggregates seminar. House Committee Approves Transportation Bill The House Transportation and Infrastructure Committee unanimously approved the Surface Transportation Reauthorization and Reform (STRR) Act of…

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