CalStar to Begin Production of Fly Ash Bricks

Although it is not vitrified, the brick looks similar to clay brick, and third-party surface testing shows that the toxic metals found in fly ash—including arsenic, mercury, and lead—are successfully encapsulated by the manufacturing process and should not leach out, according to CalStar. Indoor air quality chamber tests have not been done, but company representatives told

EBN that they are looking into obtaining Greenguard certification for chemical emissions once the bricks are in production. If the toxin levels and mortar adherence are similar to clay and cement products, the company will have created a viable brick replacement with a significantly smaller environmental footprint.