Page 16

2014SumShotcreteEMag

As mentioned previously, each construction was an effort that, we hope, will come to exem- joint was kept in an SSD condition, providing plify what the pool industry must do to change us with moist receiving surfaces—but not ones perceptions of the way we work. It’s also a clarion that were dripping wet, as we wanted to avoid call urging pool designers, engineers, and changes in chemistry and water-cement ratios builders to pay attention to basic standards and relative to new material we were applying. The procedures recommended by the American Con- pool was quite deep (sloping down from 7 to crete Institute. 12 ft 2 to 4 m), so we used scaffolds to work I know that entire organizations have built on the walls. We also kept an excavator with a themselves on the notion that pool concrete is long reach on site to facilitate removal of con- supposed to be porous, have strengths of less crete spoils left behind by cutting and trimming than 4000 psi (28 MPa), and can be made ade- and to dispose of small amounts of rebound. quate by applying some topcoat to make the Test samples of the concrete were extracted vessel hold water. The plain truth is that this sort by an independent service hired by the design of approach has prejudiced much of the com- team. Technicians performed routine concrete mercial design/construction community against analyses including assessments of the compres- the pool industry. sive strengths of sample blanks. The first test I’d say it’s time to accept higher standards— sample was assessed after 7 days at the lab, and and then exceed them, project after project. we were all thrilled by the results, which came in at 6200 psi (43 MPa). Back on site, we let the concrete cure for 28 days. In the week that followed, we filled most William T. Drakeley Jr. is of the raw shell with water and found no signs President of Drakeley Indus- of leakage. tries and W. Drakeley Swim- ming Pool Company. Drakeley A Smooth Finish Industries is a shotcrete con- After the mechanical systems were installed sulting firm that is dedicated (see the sidebar), we applied the tile interior by to the training and implemen- placing its setting bed directly on the shot product. tation of the shotcrete process This was possible because of the low perme- in regards to building water-retaining struc- ability and high density of the concrete sub- tures, ground support, and underground shot- strate: there were no issues at all with bleed crete application. Drakeley Pool Company is a water or bonding ability; indeed, use of bonding design/build construction and service firm agents or water-/damp-proofing agents would specializing in in-ground, high-end commer- only have added a potential bond-breaker to the cial and residential pools. Drakeley is an project. (This approach worked so well that, in active member of ACI Committee 506, Shot- fact, the design team is now using these speci- creting. He is the first ACI Certified Shotcrete fications in other commercial projects throughout Examiner from the pool industry nationwide. New England.) Drakeley is also an ACI Certified Nozzle - It also helped that, even given the size of the man, ASA Technical Advisor, Chair of the ASA project, the entire process went off in rapid order Pool & Recreational Shotcrete Committee, and with very few glitches or delays. We began con- serves as Treasurer to the ASA Executive Com- struction in June 2007 and the pool was commis- mittee. His writings have been published in sioned in September 2008 inside a sparkling national and international trade magazines, new building. including Shotcrete, WaterShapes, Pool and One factor that might have helped keep Spa, and Luxury Pools. In addition, Drakeley everyone on track was a “Netcast” arranged by is a Platinum Member of the Genesis 3 Group, the alumni association: they set up cameras on a licensed member of the Society of Water nearby buildings and displayed the entire project Shape Designers, and a member of the Asso- on the Internet, 24 hours a day, 7 days a week. ciation of Pool and Spa Professionals (APSP). Knowing that we were being “watched,” all crews He is also the Concrete/Shotcrete Instructor were aware that any on-site shenanigans were at the Genesis 3 Pool Construction Schools strictly off limits. and NESPA Region 1 Show in Atlantic City. Everyone views the project as a triumph, As an Instructor/Trainer, Drakeley has given from the school, its students, and alumni to the lectures on shotcrete applications for var - architects and design team who pulled every- ious pool trade shows and for World of Con- thing together. For us, however, everything was crete. Drakeley is an Expert Witness regarding sweetened by overcoming misconceptions about shotcrete applications for the swimming the shotcrete process in winning the contract: it pool industry. 14 Shotcrete • Summer 2014


2014SumShotcreteEMag
To see the actual publication please follow the link above