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Air Entrained Concrete
The Seattle Iron & Metals scrap metal facility yard is subject to extreme abrasion from bucket loaders feeding an automobile shredder. In 1999, the existing site was paved with 3 inches of asphalt capped with 12 inches of standard concrete pavement. Railroad tracks were set into the concrete so that loader buckets would rest on the track instead of wearing on the concrete. After five years, the 12 inches of concrete had worn through exposing the asphalt. BNBuilders and Cadman devised a plan to replace 21,000 square feet with a slab that would provide greater abrasion resistance.
The new slab was made with high-strength and low-shrinkage self consolidating concrete. HARD-CEM was also added at the Cadman batch plant. The full depth concrete hardening abilities of HARD-CEM makes it the logical solution for concrete in high traffic and high wear (high abrasion) environments.
Everyone involved in the project was very impressed with the good finishability and placeability. HARD-CEM worked well in the SCC/fiber mix. This project received the 2006 Excellence in Concrete Award for concrete paving from the Washington Aggregate & Concrete Association. |
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