Page 62

2016WinterShotcreteEMag

Sustainability Fig. 7: Wide angle, showing half of pool extent Fig. 8: Pour five of Royal Botanical Gardens Rock Garden pool that the conventionally formed wall had an estimated 13% greater environmental footprint. These projects exemplify opportunities to minimize the environmental impact of a facet of the construction of large projects through the application of shotcrete. HCM continues to look for opportunities to take steps toward sustainable development with a hope that an increasing number of project facets are reviewed, optimized, and chosen with sustainability in mind. David Ruhl, P.Eng., is Contracts Manager with HCM Shotcrete. He has 7 years of consulting and construction experience with a focus in concrete construction, concrete technology, corrosion control, structural restoration, and concrete coatings. Fig. 5: Single-sided formwork at Royal Botanical Gardens Rock Garden pool, Hamilton, ON, Canada Fig. 6: Shotcrete placement at Royal Botanical Gardens Rock Garden pool HCM worked with RWH to provide a designbuild solution for the rock garden pool to meet the needs of the architect and general contractor, including providing waterproofing solutions for submerged conditions. Due to the unique geometry of the pool structure, HCM proposed the use of shotcrete placement methods for concrete pool walls. The proposal was based on a SEDA score analysis of formed concrete and shotcrete placement methods for the wall elements. Because of the unique geometry, custom (non-reusable) formwork was required for walls. Shotcrete allowed for elimination of 50% of the formwork—a reduction of 2000 ft2 (185.8 m2) of formwork over the conventionally formed option. Additionally, the shotcrete surface was finished by hand to mimic aged concrete to maintain the heritage aesthetic of the pool feature. The SEDA score of this project was 1.0 for shotcrete (best of options evaluated) and 1.13 for conventional formwork. A score of 1.13 indicates 60 Shotcrete • Winter 2016


2016WinterShotcreteEMag
To see the actual publication please follow the link above