The first 10 mm slot cut was completed at New Brunswick Power's Mactaquac Dam. Trentec diamond wire cut a 24 meter deep by 20 meter long vertical slot 10 mm wide through the intake structure. Trentec originally used 10 mm wire for cutting then developed 13 mm and 15 mm wires to provide larger slots. Use of Trentec diamond wire cutting provides a cost effective method to relieve alkali-aggregate expansion.
Concrete expansion causes the piers to close against the gates causing jamming.
Powerhouse expansion causes ovallization of the turbine throat rings reducing the generator air gap. Inc. All Rights Reserved.