An article titled "Specifying Requirements for Concrete Mixtures" by NRMCA Executive Vice President of Engineering Colin Lobo appears in the April 2019 issue of STRUCTURE magazine. The article was requested to address the common overspecification of concrete mixtures seen in specifications for private projects. The article summarizes some of the unnecessary prescriptive requirements on concrete mixtures and other clauses that are not consistent with ACI and ASTM standards.
STRUCTURE magazine is a trade magazine directed to to practicing designers. Click here to read the article. Colin Lobo can be reached at clobo@nrmca.org.
National Ready Mixed Concrete Association