Several types of Portland cement are available. This became a specification for Portland cement. Alite is the characteristic constituent of Portland cement. Final phase is medical grade material similar to Portland Cement. It was making 80,000 tonnes per annum of Portland cement in 1896. The maximum content of (CA) allowed is 5% for type V Portland cement. Concrete containing GGBS cement has a higher ultimate strength than concrete made with Portland cement. Portland Cement Type I with Bismuth Trioxide. MgO is one of the components in Portland cement in dry process plants. The line connected to the Lehigh Portland Cement Company Plant located near Flagler Beach. Unfortunately, these modern attempts often contain higher than necessary ratios of Portland cement. Most of the ash is used in the production of Portland cement. USG purchased the line from the Pacific Portland Cement Company in 1946. It also occurs when Portland cement hardens. Other details are cast in portland cement.