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2015SummerShotcreteEMag

Pool & Recreational Shotcrete Corner pool tradeshows is a great start to increasing the required a 4 x 5 ft (1.2 x 1.5 m) housing to be quality of concrete pool construction, which I created on the shallow end of the pool. This was appreciate. Even with the experience in my own a fairly complicated shoot due to the length of company, we have learned a lot in the past 10 years vanishing edge wall with the attached catch about proper techniques through classes taught by basin, as well as the recessed cover housing and Bill and the ASA Education/ACI Nozzleman certi- motor compartment. The interior of the pool was fication program. plastered with a black quartz plaster to give a As an example of one of our projects, herein reflective quality to the pool overlooking the is one we built in 2012. Our company was con- valley below. tracted to construct a 25 x 50 ft (7.6 x 15 m) pool for a residential client at the top of a mountain. Lessons Learned from the ASA The pool was designed to be 3 ft-6 in. (1.1 m) deep on the shallow end and 8 ft (2.4 m) in the Nozzleman Education Program deep end. It had a large set of steps in the shallow 1. Curing of the shotcrete/concrete is a very impor- end and a standing ledge along the deep-end wall. tant step. Proper hydration can help reduce To take advantage of the panoramic view, the pool issues such as plastic shrinkage cracking during also had a vanishing edge along half of the pool hot weather. Also, drying shrinkage increases and created a 75 ft (23 m), three-sided disap- with additional water content so adding exces- pearing edge. The vanishing edge also had a lower sive water to the shotcrete mixture only decreases catch basin that was 30 in. (0.76 m) wide and 3 ft the strength and causes additional problems. (0.9 m) deep. All of the walls on the pool were 12 in. 2. We found the use of a blowpipe very useful to (0.3 m) thick dry-mix shotcrete and used about eliminate rebound in unwanted places. This 50 yd3 (38 m3) of material to shoot. The pool also was something we had heard of but had not included a floating automatic cover, which implemented until taking the nozzleman Fig. 2: Shotcreting the exterior wall of the vanishing edge catch basin before edge wall is formed and shot Shotcrete • Summer 2015 27


2015SummerShotcreteEMag
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