Page 41

2016FallShotcreteEMag

Pool & Recreational Shotcrete Corner Lily Samuels is Vice President of Drakeley Industries, a design and structural shotcrete consulting firm for swimming pools, water tanks, tunneling, mining, and other infrastructural shotcrete applications; and Vice President at Drakeley Pool Company, a specialty watershape design, construction, and service firm, both located in Bethlehem, CT. She has partnered with Bill Drakeley to develop educational materials on the history and science of the shotcrete process since 2009. Samuels received her bachelor’s degree from Smith College, Northampton, MA, and her master’s degree from Columbia University, New York, NY. Bill Drakeley is Principal and Owner of Drakeley Industries and Drakeley Pool Company. Drakeley holds the distinction of being the first and only member of American Concrete Institute (ACI) Committee 506, Shotcrete, from the pool industry. He is also an approved Examiner for the ACI Certified Nozzlemen program on behalf of the American Shotcrete Association (ASA), 2016 President of ASA, an ASA Technical Adviser, a Genesis 3 Platinum member, and a member of the Society of Watershape Designers as well as Chairman of its Advisory Board. Drakeley teaches courses on shotcrete applications at the Genesis 3 Construction School, World of Concrete, and numerous other trade shows. He is a contributor to Shotcrete magazine and other industry publications. In addition, it’s important to recognize that a growing percentage of the workforce in the construction industries does not have English as its first language. This highlights the need to extend training and education programs with presentations in other languages. That’s not a simple task by any means, but it’s another source of concern that needs to be addressed—the sooner, the better. Down the Road Despite the existence of these challenges to the ascendancy of the shotcrete process and of stubborn pockets of resistance that make universal acceptance of its merits an elusive goal, there are many reasons for optimism. First, ASA’s numerous position papers on shotcrete are already serving as educational tools and will eventually cover all functions related to watershape-related shotcrete application. Opinions are being replaced by facts, in other words, and personal preferences are giving way to standard operating procedures and an unprecedented level of conceptual unity within the affected trades. ACI and ASA are indeed taking command as definitive, binding standard-setters for shotcrete application—and it’s all sciencebased and reproducible instead of opinion-based or self-promoting. George Yoggy, the father of modern-day shotcrete in the United States, has long proclaimed the shotcrete process as the ideal method for placing concrete and steadily testifies to the fact that a scientifically advanced concrete mixture design, when delivered and consolidated at high velocity, will capably stand the test of time. He’s not a lone wolf: among others, Dr. Lihe Zhang of Zhang Consulting & Testing Ltd. has convincingly documented the successes of shot material compared to cast-in-place material. These results should lead watershapers and engineers to take note and accept only the best. Inadequate compressive strength, automatic waterproofing. and shortcuts in mixture design— all insults to our trade—should become things of the past. Those who move forward based on proper information and practice will become as accustomed to receiving accolades for the quality of their projects as were the pioneering applicators who worked for the Cement Gun Company in the 1920s and ’30s and created structures that, ever since, have stood the test of time. This is an elevated status toward which all of us should strive. Catching Up Here are references to the first two parts of this series on the history and development of the shotcrete process: Part I: “Beginnings,” Shotcrete magazine, V. 17, No. 3, Summer 2015, pp. 22-24. Part II: “Shotcrete Reborn,” Shotcrete magazine, V. 18, No. 2, Spring 2016, pp. 42-45. Shotcrete • Fall 2016 39


2016FallShotcreteEMag
To see the actual publication please follow the link above