Mont Sainte-Marguerite, QC Wind Farm Project:
March 2018 CPD Project of the Month
- 46 Siemens 3.2 MW turbines – 147.2 MW
- Developer : Système Energie Renouvelable (RES)
- General Contractor: Borea Construction
- CPD Non-Shrink Grout H.E.S.- SR
Mont Sainte-Marguerite Wind is a 147 MW project located approximately 50 kilometers south of Québec City, in the Chaudière-Appalachia region of Québec. Borea Construction, under the supervision of Pattern Development’s construction management team and RES Canada, was the General contractor in charge of the project. The project has a 25-year power purchase agreement with Hydro-Québec.
When the Borea project management team was looking for a non-ferrous, non-shrink grout for this project, the specifications stated that they could consider either an epoxy or a cementitious grout. The team quickly decided to go with a cementitious grout since it required less work, less testing, and follow-up (lower total cost). They also wanted a grout that was pumpable (for fast placement), easy to work with (that can be easily placed in tight openings that can vary from 25 mm to 40 mm) and that could reach the required compressive strength prior to 28 days in order to facilitate tower & turbine erection.
After an in-depth analysis of the different competitive products, the CPD Non-Shrink Grout (pre-mix) HES-SR was chosen since it met all of their requirements and offered the following compressive strength performance – which allowed them to do full erection of tower sections, turbine and blades prior to 28 days:
Compressive strength table for product HES-SR; high early strength, as per TDS:
1 day: 45 MPa
3 days: 65 MPa
7 days: 80 MPa
28 days: 90 MPa
Results: The general foreman, the site supervisors, and the workers were very pleased with the performance of the CPD Non-Shrink Grout (pre-mix) HES-SR grout and the general foreman’s comments were:
“the CPD Non-Shrink Grout (pre-mix) HES-SR grout is easy to work with and gives incredible breaks, it allowed us to grout up-to- 3 towers per day and to quickly start with the erection of the tower”.
Note: the product CPD Cipadeck Cure & Seal was also used as it allowed the crew to proceed with the work on the next tower without having to come back to take care of the curing.
