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Sustainability watchdog sets concrete production water accounting standards

The Cement Sustainability Initiative has capped a two-year effort to formalize accounting of water consumption and recycling in cement, concrete and aggregate production. The new 34-page Guidance on Good Practices for Water Accounting builds on Protocol for Water Reporting for the Cement Industry (2014) and Water Key Performance Indicators (2015).

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Officials give high strength rebar the green light in congested Big Apple

The New York City Buildings Department now recognizes structural designs using high strength Grade 100 concrete reinforcing steels. Through issuance of Buildings Bulletin 2015-036, Irvine, Calif.-based MMFX Steel Corp. of America notes, the city accepts designs employing the 100,000-psi yield strength of ASTM A1035/A1035M-15 rebar. The document clears the way for MMFX high strength ChrõmX rebar in a market ushering a wave of active or proposed tower projects whose slender profiles invite reinforced concrete design—owing especially to stiffness characteristics tempering sway.

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RHEOLOGY OF TREMIE CONCRETE

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Models ease block, brick specifications

The National Concrete Masonry Association-backed Building Information Modeling for Masonry Initiative’s (BIM-M) new guide, BIM for Masonry Modeling Masonry Buildings, provides architects, engineers and mason contractors with tools for developing Autodesk Revit models. BIM-M and The Masonry Society teamed to fund and oversee guide production. Published through TMS, the 17MB document is available for free download from www.tms.org.

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Foundation groups inject rheology into revised tremie concrete practice

The Deep Foundations Institute (DFI) and European Federation of Foundation Contractors (EFFC) have released a free download of their recent Best Practice Guide to Tremie Concrete for Deep Foundations. The publication stems from initial efforts of the joint DFI and EFFC Concrete Task Group, established in 2014 to study common problems in drilled shafts and diaphragm walls constructed using tremie methods.

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