Decew Water Treatment Plant Spillway
St. Catharines, ON, Canada
After years of erosion the Regional Municipality of Niagara decided it was time to replace the Decew Water Treatment Plant Spillway. The original reservoir spillway was constructed using wood, which had deteriorated significantly over its service life. The engineers planning the project decided to replace the wood with a more durable concrete spillway. To ensure extra durability, they sought out a concrete hardening solution that could further increase the service life of the structure.
After considering the performance of different hardening options the team specified Hard-Cem, Integral Hardening Admixture, for both cast-in-place and precast concrete areas subject to erosion from flowing water. Hard-Cem can be used with the air entrained concrete already specified for this project, and most importantly it extends concrete wear life up to 6 times under harsh conditions. The project also called for a hardening solution that could be used in both horizontal and vertical applications, a requirement Hard-Cem meets. When added to concrete, Hard-Cem’s proprietary technology increases the hardness of the concrete paste and reduces fine and coarse aggregate exposure that creates degradation to concrete surfaces. Since it is integral it continues to offer surface wear resistance throughout its life. By increasing the abrasive-erosive service life of concrete, maintenance costs are reduced and replacement of the concrete is substantially deferred.
Hard-Cem was used in the articulating concrete blankets and any other areas that were exposed to running water. The erosion resistance provided by Hard-Cem will ensure the structures exposed to constant running water will last significantly longer. The precast manufacturer incorporated Hard-Cem into their traditional precast mix to make the articulating blankets specified for this project. The precaster reports they were able to incorporate Hard-Cem without any issues or adverse reactions in their concrete mix or finished product.
Hard-Cem is an Integral Hardening Admixture used to increase Abrasion and Erosion resistance of concrete. Hard-Cem is added to the concrete at the time of batching to increase the hardness of the concrete and expand concrete wear life. It outperforms and overcomes deficiencies of labor intensive surface applied hardeners, and can be used to enhance...