GeneralUnderstanding Wet-Mix Shotcrete: Mix Design, Specifications, and Placement
Denis Beaupre, Marc Jolin
Read MoreThe purpose of this article is to examine the use of modern wet-mix shotcrete in underground environments. A critical review is provided of aspects such as mixture design, specifications, and placement. More specifically, the intent of this article is to identify the limits of the
GeneralDesign Globally, Proportion Locally
Kevin A. MacDonald, PhD, PE, and Mark Lukkarila
Read MoreThe purpose of this article is to examine the use of modern wet-mix shotcrete in under-ground environments. A critical review is provided of aspects such as mixture design, specificcations, and placement. More specifically, the intent of this article is to identify the limits of the
GeneralHow to Plan Your Safety Training Program
Thomas H. Adams
Read MoreThe subject of safety training necessarily starts with the question, œWhat do we need? A training-to answer this question. These answers will begin to deï¬ne the content, frequency, categories of employees to be trained, and documentation required. Some training is required by law. Federal, state,
GeneralUpdate on Standards for Shotcrete
Peter C. Tatnall
Read MoreThere have been a number of articles on shotcrete speciï¬cations or guidelines since Shotcrete™s debut issue in 1999.1-5 Because this issue™s theme is Specitcations, I thought it timely to offer an article updating the state of current standards in North America and the ongoing work
GeneralJust Add Water…
Craig McDonald
Read MoreSufficient water supply is one of the most important variables in the application of good-quality dry-mix shotcrete. It is often overlooked, especially by people who are new to the industry. Although the flow required is relatively minimal (10 to 60 L/min [2.5 to 16 gal./min]),
GeneralFreeze-Thaw Durability of Shotcrete
Dudley R. (Rusty) Morgan
Read MoreShotcrete has been used in construction in North America for almost 80 years. Initially, all shotcrete was applied by the dry-mix shotcrete process, where the majority of the mixed water is added at or near the nozzle just before the shotcrete is pneumatically consolidated by
GeneralScaffolding is Serious Business
Joe Vierra of Concrete Structures
Read MoreAccording to the Occupational by Joe Vierra of Safety and Health Admini-Concrete Structures stration, 2.3 million construction workers work on scaffolding on a frequent basis. Every year, approximately 4500 injuries and 50 deaths occur in scaffold-related accidents with an estimated $90 million in lost workdays
GeneralTechnical Tips on Shotcrete Finishing
Denis Beaupre
Read MoreIn this section of the fall issue of ASA™s Shotcrete, I introduced some aspects of pool finishing. I receive many calls, questions, and comments from people about the new finishing tools. Since this issue is on architec-tural shotcrete and finishing, I thought it would be
GeneralSpanish Terminology in the Shotcrete
Cesar Chan and Raul Bracamontes
Read MoreFor effective communication and interaction among groups in this industry, the knowledge and use of the Spanish language in the American construction industry has been increasingly recognized as a growing requirement, rather than an exception. According to U.S. Census Bureau reports for the year 2000,
GeneralSafety Shooter: Daily Inspection Can Improve Safety
Chris Zynda
Read MoreIt’s 5:30 in the morning in our yard. All of the compressors, trucks, shot-crete pumps, and related equipment are on their way out of the yard for the day™s operations. It™s important that the equipment gets to the various jobsites, which could be anywhere from