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 Seaside, CA- A private school in the Northern California city of Seaside has chosen Lehigh Southwest Cement's ALLCEM Ground Granulated Blast Furnace Slag as an environmentally friendly method to help achieve a U.S. Building Green Building Council's "Platinum LEED certification." Chartwell School a private, non government funded school that educates students with dyslexia and other related language-based learning differences, used slag in its concrete mixes for their new campus. The new school is located on 29 acres of land overlooking Monterey Bay at the former Fort Ord military base in Seaside, CA. The school which currently has 103 students enrolled, teaches students, 6 to 14 year old, the necessary learning skills and self-esteem for them to successfully return to mainstream education.
The school is one of the first in the nation designed and built from the ground up to meet the highest Green Building Council's "Leadership in Energy and Environmental Design" (LEED) rating system which is a Platinum level. Other innovative building materials and practices were used on site to meet the requirements and the use of slag played a large part in allowing them to achieve this rating. The Chartwell School project was recently featured in a publication of Concrete Monthly and will be featured in the July issue of Concrete Products, two national concrete trade publications.
Lehigh Southwest Cement Company in Concord, CA supplied the slag from is distribution import terminal in Stockton, CA to The Don Chapin Company in Salinas, CA. The Don Chapin Company is a ready mix producer in the Monterey Bay area. They used a mix design of 30% slag and 70% cement to provide concrete to their customer Ausonio, Inc., a Castroville, CA based local contractor. Andrew Ausonio, president of the company explained that "they were able to use concrete supplemented with slag to provide a stronger, less expensive material that helps Chartwell fulfill the requirements of LEED certification."
Slag is a supplementary cementious material that brings unique qualities of increased compressive strengths, improved sulfate resistance and economic benefits to the concrete and is an environmentally friendly product. Slag is the byproduct of the iron ore smelting process and when cooled and ground to tight specifications produces a product that can greatly enhance the qualities of concrete. Slag that can't be modified to meet ASTM specifications is often sent to a landfill as a waste product. By using slag in concrete, enhanced concrete qualities can be realized and environmental benefits of reduced landfill waste and reduced CO2 emissions can be gained. Slag cement can replace a portion of the portland cement in concrete which helps reduce energy consumption used in cement production. Slag is recognized by the Environmental Protection Agency as a recovered product and can be used for LEEDS credits.
Lehigh Southwest Cement is one of the first companies to bring slag into California and currently the largest importer of slag in California. Lehigh entered into a long term partnership with an Asian steel producer for the slag product and has been marketing the product to its customers who understand its unique benefits to concrete. Bill Boughton, VP of Sales - Northern Region, for Lehigh comments that "since there are limited volumes available to us to market, we want to make sure that we do not oversell our import volumes. We need to partner with customers who can market the product in a value oriented way that will extract the most value from its use."
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