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2014WinShotcreteEMag

as Gunite Supply hoses and tools to place 85,000 ft3 (2400 m3) of shotcrete over a 3-year span. All application was accomplished by ACI Certified Nozzlemen, through the ASA education and ACI certification programs. All shotcrete materials were produced using Strong Industries volumetric mixer trucks. Thou- sands of test samples showed consistent results ranging between 5000 and 5800 psi (34 and 40 MPa) in 14 to 28 days. During the 3-year period, there were only two irregular test samples with low values. After the project was completed, the only maintenance required was touch-up of the wall colors, which were discolored by minor efflores- cence. Most real rock walls would experience the same discoloration. Fig. 6: Shotcrete placement Maximum Benefit: Cost Savings The Perfect Finish and Increased Usable Land Once the excavation was to grade for a single Ringler’s team successfully completed all wall, the permanent shotcrete facing was installed. shotcrete work on this project in November 2012. This consisted of an additional layer of wire mesh This highly successful application of the soil nail and an additional 8 in. (200 mm) minimum layer wall system resulted in both substantial savings of dry-process shotcrete. to the owner as well as an increase of an additional The final 2 in. (50 mm) of the shotcrete facing 30 ft (9 m) of open space for the condominium was then placed and hand-carved to simulate the project. The design and construction of this proj- type and color of the rock that was mined from ect’s walls using faux-rock-finished soil nail walls the quarry. Once the facing cured, it was stained minimized the excavation required, eliminated and sealed to provide a faux-rock finish as desired, any backfill, provided temporary and permanent using various color blends of Aquastain T-96 by excavation support, and customized the curved The Euclid Chemical Company. wall contours. The cost of this system was far less For the entire dry-process shotcrete application than using conventional cast-in-place walls and process, the team relied on twin Airplaco/Gunite stone facing, and maximized the remaining sur- Supply & Equipment C-10’s Rotary Guns as well face area available for development. Fig. 7: Overview of entire project 46 Shotcrete • Winter 2014


2014WinShotcreteEMag
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