Concrete Joint Sustainability Initiative names 2015 officers
Published: Friday, 08 May 2015 13:21
Written by Concrete News
A coalition of industry institutes and associations representing individuals and companies that design, fabricate, construct, or maintain concrete structures, the Concrete Joint Sustainability Initiative (CJSI) has appointed Lafarge Construction Specialist Julie Buffenbarger as chair, plus Portland Cement Association CEO James Toscas and American Concrete Institute Director of Sustainability and Marketing Kevin Mlutkowski as vice chairs, focusing on advocacy and operations, respectively.
Read more: Concrete Joint Sustainability Initiative names 2015 officers
Super Air Meter gauges void spacing, freeze-thaw durability prospects
Published: Wednesday, 25 March 2015 14:50
Written by Don Marsh
A modified version of the ASTM C231, Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method vessel, the Super Air Meter (SAM) measures air-void spacing and air content of plastic concrete in about 10 minutes. Void spacing has been shown to be a better indicator of freeze-thaw durability than total air content, SAM developers note, but challenging to pinpoint—especially in the fresh concrete.
Read more: Super Air Meter gauges void spacing, freeze-thaw durability prospects