USGBC "Concrete:Top Pic for Countertops in a Green Home"

via-white-concrete-countertopConcrete is a very resilient material for countertops. It is not by nature a green product - cement production and transportation are extremely energy-intensive—but if the aggregate is recycled and locally sourced, and load additives such as VCAS can be added, the energy intensity falls.

Concrete can be molded into custom shapes and dyed almost any color or given distinctive blended looks, though you should inquire about the toxicity of dyes. Once cast into countertops, concrete can withstand heat very well. However, concrete counters should be sealed periodically to limit stains, water damage and bacterial growth, and heat can damage the seal. Certain sealers with nanotechnology can resist 99% of the staining and withstand heat of boiling pots set directly onto them

Treated well, concrete can last a lifetime. At the end of its useful life in your kitchen, it can be reused whole or cut for other projects. Unwanted concrete can be crushed into aggregate for producing new concrete, saving energy used in mining resources to produce new concrete and keeping old concrete out of landfills. - Source USGBC Green Home Guide - B