Caltrans issued a new release this week to publicly announce their approval for the use of Portland limestone cement in concrete. “Using low-carbon cement can cut Caltrans’ concrete-related carbon dioxide emissions annually by up to 10 percent. This is a big step in supporting California’s efforts to achieve carbon neutrality by 2045, ” said Toks Omishakin, Caltrans Director. Caltrans conducted a 3-year study of Portland limestone cement and issued a specification to allow its use in October. Caltrans has also already approved several sources of Portland limestone cement (type IL) on its authorized materials list. “Caltrans will continue to work with the California Air Resources Board to reach the state’s goal and achieve net-zero emissions from the cement sector by 2045,” said the release. Per CALCIMA 1/26/22