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
GeneralSafety Shooter: Guilty through Association Wall Forms and Rebar Safety Tip
Chris Zynda
Read MoreI remember doing a job in San Francisco, CA, about nine or ten years ago. The job consisted of building a basement in an existing commercial area. There were buildings on both sides of the new proposed basement. The construction called for the new basement
GeneralCertification vs. Qualification of Shotcrete Nozzlemen
Merlyn Isaak
Read MoreIn 2000, ACI, in cooperation with ASA, estab-lished a formal certiï¬cation program for certifying shotcrete nozzlemen. Prior to that date, ACI had a guideline document for certifying nozzlemen, but it was not being uniformly applied, it contained outdated features and appli-cations, and it was not
GeneralInfluence of Construction Joints in Wet-Mix Shotcrete Panels
Jean-Francois Trottier, Dean Forgeron, and Michael Mahoney
Read MoreWhere a section of shotcrete is left incom-plete at the end of a shooting shift, some provision must be made to ensure that the joint will not develop a plane of weakness at this point. According to the American Concrete Institute™s œGuide to Shotcrete1 and
GeneralCalcium Aluminate Technology and It’s Application in Refractory Shotcrete
Mark W. Fitzgerald, Joseph Talley, and Charles W. Alt
Read MoreThe use of calcium aluminate cement as the binder in refractory systems in general, and refractory shotcretes in particular, is widely approach to high-performance refractory shotcrete involves the use of calcium aluminate aggregates along with the calcium aluminate cement. The addition of this unique aggregate