Kitchen Countertops / September 10, 2018 / Anthony Williams
Concrete counters can be a terrific green choice if they are sourced locally or cast in place (transporting heavy slabs great distances consumes a lot of energy). Also, look for low-impact aggregates, such as increased coal fly ash, and recycled glass or paper.
Sustainability: The cement in concrete is derived from heating limestone, which is a carbon-intensive process that creates gas emissions. However, slag cement, fly ash and silica fume — all industrial waste by-products that are carbon neutral — can replace more than 50 percent of the cement, reducing emissions and improving the concrete’s ecofriendliness.
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