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Pool & Recreational Shotcrete Corner hoses, sprinklers or even wet burlap if you’re in structures that will endure the test of time. Miss an area with water restrictions. However you do it, those marks and you’ve stacked the deck in favor the concrete must be wetted for at least seven days. of failure. Consider this final thought: In the end it doesn’t Elevating The Game cost more to do the job right, it only requires that If you follow the above measures with each you embrace a set of basic and necessary steps. and every project, your results will be far superior Doing so will ultimately save money and heartaches to the majority of concrete pool structures now down the line. being built. In my years studying pneumatically There’s simply no downside to doing the job placed concrete and teaching people in our correctly. I’ll go so far as to argue that as profes- industry how to do it correctly, I’ve found sionals we have what amounts to a moral obligation numerous examples where every basic step I’ve to follow guidelines set forth by ACI/ASA and give outlined here has been compromised to some our clients the best possible concrete structures degree or another. (yes, a shell that does indeed hold water), each and The result is an inferior end product usually of every time you fire up the equipment. low compressive strength, all of which leads me to a final point. Over the past few years I’ve stirred up more than my share of controversy saying that waterproofing William T. Drakeley Jr. is agents should not be necessary. The reason I say President of Drakeley Indus- that is if you initially (design the mixture and shoot tries and W. Drakeley Swim- to) achieve 4000 psi (1.3 MPa) concrete, the shell ming Pool Company. Drakeley is well on its way to becoming water tight without Industries is a shotcrete con- any additional membranes, coating or penetrating sulting firm that is dedicated to sealers. Unfortunately, the vast majority of projects the training and implementa- don’t meet that standard and waterproofing tion of the shotcrete process in becomes a necessary prophylactic measure. regards to building water-retaining structures, I’m not an opponent of waterproofing per se, ground support, and underground shotcrete but rather a proponent of quality concrete. When application. Drakeley Pool Company is a these fundamentals are followed, we create design/build construction and service firm spe- cializing in in-ground, high-end commercial and residential pools. Drakeley is an active member Seamless Structures ACI Certified Shotcrete Examiner from the poolof ACI Committee 506, Shotcreting. He is the first In shotcrete, there’s no such thing as a cold industry nationwide. Drakeley is also an joint. You can stop shooting and come back a ACI Certified Nozzleman, ASA Board of Direction year later and if the surface and surround are member, ASA Technical Advisor, and Chair of the properly prepared you can resume shooting ASA Pool & Recreational Shotcrete Committee. His and still come away with a monolithic structure. writings have been published in national and We use a method called saturated surface international trade magazines, including dry (SSD), which simply means that after Shotcrete, Watershapes, Pool and Spa, and Luxury you’ve roughened a receiving surface, cleaned Pools magazines. In addition, Drakeley is a out the pores and the surface is free of loose Platinum Member of the Genesis 3 Group, a material, it is then wetted or dampened as a licensed member of the Society of Water Shape condition of the substrate which helps ensure Designers, and a member of the Association of good bondability. Pool and Spa Professionals (APSP). He is For many of our commercial projects, the also the concrete/shotcrete instructor at the vessels are so large that they require multiple Genesis 3 Pool Construction Schools and NESPA days to shoot. Using the SSD procedure, we Region 1 Show in Atlantic City. As an instructor/ create what are known as construction joints, trainer, Drakeley has given lectures on shotcrete which in effect disappear completely once you applications for various pool trade shows and for resume shooting. It’s not a so-called cold joint, World of Concrete. Drakeley is an Expert Witness control joint or expansion joint, these “joints” regarding shotcrete applications for the swimming don’t exist in shotcrete construction. pool industry. 36 Shotcrete • Spring 2013


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