CTLGroup began in 1916 as the research and development laboratory for the Portland Cement Association (PCA), which was formed to develop the use of portland cement in construction, which at the time had become the most common construction material.
CTLGroup began in 1916 as the research and development laboratory for the Portland Cement Association (PCA). The Portland Cement Association (PCA) was formed to develop the use of portland cement in construction. Construction at the time had become the most common construction material.