Concrete Products

AUG 2014

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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www.concreteproducts.com August 2014 • 37 INNOVATIONS REPORT SILO MAINTENANCE Bulging sidewalls were the most visible sign of material build up in the plant's cement and fy ash silos. Martin Engineering crews remain outside silos thanks to the Martin Heavy Duty Whip, requiring an opening as small as 18in. to dislodge material through a vessel. tend to be heavy and cumbersome. They also present the possibility of a fuid leak, which could damage otherwise-salvageable material. The pneumatic whip needs just 100 CFM at 90 psi, which can usually be supplied from a plant's existing compressed air system." PROBLEM SOLVED The technicians secured the equipment over an access hatch at the top of each Com- mercial Acres vessel. Though all Martin silo cleaning crews are OSHA and MSHA certified for confined space entry, they instead used remote control from outside the bin to safely guide the cleaning head. T he t wo - m a n c rew lowe re d t he w h i p through an opening in the blockage, starting at the bottom and undercutting the material as they worked their way up. In most cases, the technique allows material to be recaptured and returned to the material stream; indeed, Stark was able to salvage the entire 40 tons of cementitious product removed. The entire process limited downtime to a single day, the crew a) removing all internal horizontal supports; b) pulling all sidewalls back to their original fat posi- tion; and, c) replacing the horizontal brac- ing and adding further dimensional sup- port. — Martin Engineering, Neponset, Ill., 309/852-2384; www.martin-eng.com

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