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. The engineers planning the project wanted to replace wood with a more durable material. Even though they decided to build a concrete spillway, they wanted to ensure the concrete was durable and long-lasting. To that effect, they sought out a concrete hardening solution that could extend the service life of the structure.
The project called for air-entrained concrete to be used in both horizontal and vertical applications. Moreover, both cast-in-place and precast concrete would be used in the project. The engineers were looking for a hardener that would meet all these varied requirements and increase durability even when the concrete was subjected to constant erosion and flowing water. After considering the performance of different hardening options, the engineering team was not satisfied; each product had its own set of limitations.
Hard-Cem meets all these diverse requirements, and more. When added to concrete, Hard-Cem’s proprietary technology increases the hardness of the concrete paste and reduces exposure of fine and coarse aggregate to the elements. Since it is integral, it can be used in both cast-in-place and precast concrete, and in both horizontal and vertical applications. Hard Cem’s integral quality also ensures that it continues to offer surface wear resistance throughout its life, unlike surface-applied liquid membranes which can flake or peel away with time. By increasing the erosive-abrasive service life of concrete, Hard-Cem is able to extend service life by up to 6 times, and consequently, defer maintenance and repair costs substantially.
The precast manufacturer incorporated Hard-Cem into their traditional precast mix to make the articulating blankets and other areas exposed to the water. The erosion resistance provided by Hard-Cem will ensure that even though the structure is exposed to constant running water, it will last significantly longer.
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 extend concrete wear life. It outperforms and overcomes deficiencies of labor intensive surface applied hardeners, and is used to enhance durability...