Addressing Regional Sustainability: A Case Study of Little Mountain Reservoir Reconstruction (LMRR) Using Concrete Containing Large Volumes of Fly Ash

The Little Mountain Reservoir located in Queen Elizabeth Park Vancouver British Columbia Canada was originally constructed as an open basin in 1910 and a roof structure was added in the mid 1960s. Because of seismic and structural deficiencies of the structure it was decided to demolish the reservoir and construct a new one on the same site with increased capacity and enhanced operational flexibility. Demolition of the existing reservoir began in September 2002 and construction of the new facility was substantially complete by December 2003. Regional sustainability principles were incorporated into the design and maximum feasible amounts of fly ash were utilized for all concrete components in this project. The concrete specification recognized the difference between winter and summer replacement levels of fly ash addressing schedule and constructability constraints. The resulting concrete met or exceeded the specified requirements provided excellent surface finish and the project was completed within the tight schedule.

This paper presents the approach used to achieve sustainable concrete generally and specifically the properties of the concrete with large volumes of fly ash used in achieving high quality concrete with an anticipated 100 year service life.

The paper includes photographs and mixture proportions.

Case Study Report Author: A.P. Sukumar, Phil Seabrook, P.Eng., John Sherstobitoff, Frank Huber