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2015SummerShotcreteEMag

Pool & Recreational Shotcrete Corner course. It helped us to maintain quality of shotcrete placement, especially in tight spaces and complex installations. 3. Application techniques were also reinforced in the certification class. The position of the nozzle relative to the surface and the mixing process that occurs with the movement of the nozzle can greatly improve the quality of the in-place shotcrete as well as reduce rebound. In the pool structure, wet- or dry-mix shot- crete is the backbone of concrete pool construc- tion. There is not enough tile or plaster that can Fig. 3: Catch basin for vanishing edge before cover up a poor shotcrete installation. Most finishes structural and aesthetic issues from cracks or efflorescence can be traced back to a bad shot- crete job. What is hard for me to understand is: why don’t more pool builders know more about the process? What is rebound? Why is it bad? What concrete strength should be used in a pool installation? What are the proper nozzling techniques? These and others are all questions to which good pool contractors must know the answers. There is much more to quality shot- creting than simply holding on the end of a hose. I also have had a hard time with pool consultants giving me grief about accepting the dry-mix process only because they had someone Fig. 4: Pool shell complete before tile and do a bad job in the past. It’s not the product at coping installation fault—just the application. I encourage all pool contractors, from small to large, to become more involved and more educated about shot- crete so the quality of pool construction con- tinues to get better over time. Jason Vaughan is President of National Pools of Roanoke, Inc., in Roanoke, VA. National Pools is a design-build gunite pool builder that services both Fig. 5: Floating automatic cover being the residential and commercial retracted into hidden cover housing pool markets in Virginia and West Virginia. Vaughan is responsible for the design and project manage- ment of the majority of the projects built by National Pools for the past 18 years. Vaughan is an active member of the Association of Pool and Spa Professionals (APSP) where he serves as a local Chapter President, regional committee member, and an APSP WAVE Young Profes- sionals Network committee member. His pool industry certifications include Certified Building Fig. 6: Completed pool with three-sided Professional, National Plaster’s Council Start- vanishing edge up Technician, and Certified Service Technician. 28 Shotcrete • Summer 2015


2015SummerShotcreteEMag
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