This document appears to be a March 2011 issue of a mining media publication. It contains several article summaries including: a revolution in trucks on page 4; sustainable concrete plant certification on page 6; RCC admixtures on page 8; a 7 million yard concrete pour on page 18; a mega twin-shaft mixer on page 33; the NRMCA Chairman on page 34; drivers of the year on page 37; and Lehigh's HPC silo on page 64.