National Institute of Standards and Technology (NIST) in Gaithersburg, MD, has published Technical Note 1906, Minimizing Paste Content in Concrete Using Limestone Powders – Demonstration Mixtures. The authors have demonstrated adequate concrete performance with concrete mixtures with up to 28% lower cement content using a binary blend of portland cement and limestone powder. The mixtures also contained a lower mixing water content and adequate workability was provided through the use of HRWRA admixtures. Paste, mortar and concrete performance has been documented.

Download the report here. For more information, contact Karthik Obla at kobla@nrmca.org.