The Big Dig remains a gift that keeps on taking from Bay State taxpayers and Boston area motorists using Massachusetts Turnpike Authority routes. A project whose initial cost was pegged in the early 1980s at $2.5 billion could carry an ultimate price north of $20 billion, by Boston Globe calculations.
The fifth North American Conference on the Design and Use of Self-Consolidating Concrete, or SCC 2013, offered strong market and technical perspectives on one of the industry’s best value propositions to the architectural/engineering/construction community of the past two decades. Presenters at the mid-May event in Chicago demonstrated how stakeholders have compelled American Concrete Institute and ASTM International committees to develop guidelines and standards indicating self-consolidating mixes’ quality in plastic and hardened states.
While not alleging collusion or other illegal behavior, the British counterpart agency to the U.S. Federal Trade Commission and Department of Justice Antitrust Division is considering steps to increase competition among three major, integrated producers following an inquiry of the U.K. portland cement, GGBF slag cement, aggregate and ready mixed concrete supply chain.
New U.S. Energy Information Administration (EIA) figures reinforce a well-worn statistic in the climate change discussion: portland cement production accounts for about 5 percent of global carbon dioxide emissions. The carbon load reflects high temperature raw feed preheating and kiln phases, plus power-hungry clinker grinding.
After a three-month trial with a handful of McNeilus Next Generation Initiatives mixer trucks, our cover story subject decided 2012 would be a turning point in fleet and fuel specifications: diesel out, natural gas in. A leader in greater Chicago and northern Indiana ready mixed, Ozinga Brothers Inc. is now a leading catalyst for the industry's adoption of compressed natural (CNG) vehicle power (pages 22-25 ).