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Super Air Meter gauges void spacing, freeze-thaw durability prospects

18 Air ii 150A 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.

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NRMCA certifies five Graniterock plants’ Environmental Product Declarations

17 EPD 150Northern California’s leading independent aggregate and concrete operator, Graniterock, has issued Environmental Product Declarations covering 30 mixes at three central and two transit mixed plants serving Silicon Valley and coastal markets south. National Ready Mixed Concrete Association certified the documents as an EPD Program Operator, adding them to a growing industry library hosted on its website.

Read more: NRMCA certifies five Graniterock plants’ Environmental Product Declarations

BASF macrofiber secures polymer-cementitious material bonding

14 BASFi 150Following up on two major 2014 product introductions—MasterLife CRA (Crack-Reducing Admixture) 007 at World of Concrete, MasterSphere FT (Freeze-Thaw) 300 at ConExpo-Con/Agg—BASF Admixture Systems returned to Las Vegas this year with another concrete breakthrough attributable to its parent company’s vast well of chemistry.

 

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Multifamily lender lowers interest rates for LEED-certified projects

As part of its Multifamily Green Initiative, Fannie Mae is granting a 10 basis point reduction in the interest rate of a refinance, acquisition or supplemental mortgage loan for a multifamily property carrying certification or recognition under U.S. Green Building Council LEED, EPA Energy Star or Enterprise Green Communities programs. On a $10 million dollar loan amortizing over 30 years, an owner could save $95,000 in interest payments across a 10-year term based on 3.9 percent versus 4 percent market rate.

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Ozinga RMC tops bidders for Mack-mounted McNeilus Bridgemaster

12 CIMLogo 150The National Steering Committee for the Concrete Industry Management (CIM) program raised more than $800,000 in gross revenue at its 10th annual auction. Proceeds will benefit CIM degree programs at Middle Tennessee State University, Murfreesboro; California State University, Chico; New Jersey Institute of Technology; and, Texas State University.

Read more: Ozinga RMC tops bidders for Mack-mounted McNeilus Bridgemaster