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2014FallShotcreteEMag

Industry News Short Course on Shotcrete for A total of 41 papers were presented on topics including the Underground Support design of rock support systems, tunnel lining design concept, studies and evaluation of accelerators, fibers, mineral additives, The American Exploration and testing methods for flexural toughness, early-age strength Mining Association (formerly development, airflow, field large-scale testing, waterproofing Northwest Mining Association) membrane systems, measurement of shotcrete thickness with will be hosting a short course, laser scanning, thermal image measurement of in-place titled “Shotcrete for Underground shotcrete temperature, and underground shotcrete development Support,” at its 2014 Annual in Europe, the United States, Canada, and Australia. Topics meeting in Reno, NV, on Tuesday, also include research and development, field trials, project December 2. Led by instructor reports, and durability of shotcrete. Lihe (John) Zhang, Materials For detailed information on the conference and conference Engineer, LZhang Consulting & Testing Ltd., Vancouver, BC, proceedings, please contact Marc Jolin at marc.jolin@gci. Canada, this 8-hour course focuses on underground shotcrete ulaval.ca, or John Zhang at zhanglihe@gmail.com, or visit for mines and tunnels. http://sprayedconcrete.no. The class will provide basic knowledge and case studies of underground concrete and shotcrete for site supervisors, nozzlemen, engineers, and designers. Topics to be covered include: 1. Concrete basics: chemistry of cement and concrete, concrete mixture design, concrete performance, supplementary cementitious materials, and chemical admixtures. 2. Specialty concrete for underground application: self- consolidating concrete (SCC), high-performance concrete, and fiber-reinforced concrete. 3. Quality control and troubleshooting for concrete: concrete batching, supply, delivery and risk, quality control testing and inspection, curing and protection, strength development, temperature (including temperature effect, hot-weather concrete, and cold-weather concrete), and mass concrete Left to right: Stefan Bernard, Australia Shotcrete Society; construction. Nicolas Ginouse, Laval University, Canada; Marc Jolin, 4. Shotcrete basics: ground support; wet-mix versus dry-mix Laval University, Canada; Thomas Beck, MAPEI, Norway, process; and equipment and system for each process. Chair of the Scientific Committee; Ola Woldmo, Normet, 5. Fiber-reinforced shotcrete: mixing, pumpability, testing, and Norway, Chair of the Organizing Committee; and Lihe application. (John) Zhang, LZhang Consulting & Testing, Canada 6. Underground shotcrete application: batch, transport, remixing, and application. Shotcrete Used to Repurpose 7. Underground shotcrete application: hand nozzling and robotic sprayer application. Burned Structure as Park Pavilion 8. Underground shotcrete application: proper use of accelerator. A local treasure dating back more than a century, El Bethel The cost of attendance for this course is $275. For more Missionary Baptist Church was transformed into a public park information, please visit www.miningamerica.org. memento after falling victim to an arson attack in 2007. Epoxy Design Systems successfully repurposed much of the 7th International Symposium remaining structure as a park pavilion in a manner that reflects on Sprayed Concrete for the original architecture of the church by using QUIKRETE® Underground Support Shotcrete MS.Originally built in 1889, El Bethel Missionary Baptist On June 16-19, 2014, the 7th International Symposium on Church served the post-Civil-War community of Houston’s Sprayed Concrete for Underground Support was held in Fourth Ward until being replaced with a new sanctuary in 1997. Sandefjord, Norway. Over 120 attendees spent a total of 3 days Unfortunately, the vacant church burned down in 2007 in a discussing, sharing, and enjoying the advancement of sprayed case that remains unsolved today. Several years later, the City concrete technology. Attendees were professionals from of Houston purchased the remains with plans to convert the Norway, Sweden, Finland, Germany, Austria, Switzerland, area into a park memorializing the church, which is on the Belgium, the United Kingdom, France, Spain, Chile, Canada, National Register of Historic Places and is one of the oldest Australia, Malaysia, and China. sanctuaries in Houston. 58 Shotcrete • Fall 2014


2014FallShotcreteEMag
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