3D printing specialist plans Pennsylvania parcel for equipment, R&D hub

Sources: Black Buffalo 3D Corp., Elizabeth, N.J.  Black Buffalo, developer of Nexcon 3D printing equipment and technology for cementitious materials, has acquired a 106-acre, East Stroudsburg, Pa. site for a permanent U.S. plant. Augmenting a charter New Jersey facility, the new operation will serve as a North American hub for production and assembly of modular Nexcon 3D Construction Printers, engineered…

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U.S. Concrete adds northern California terminal, bulk storage site

Sources: U.S. Concrete Inc., Euless, Texas; CP staff U.S. Concrete has strengthened its West Region ready mixed operations through the acquisition of a cementitious materials terminal, bulk storage facility, and eight-acre parcel with access to the Port of Stockton, Calif. Port officials note that the previous owner, George Weinberger Properties, had leased the site to Boral Resources. 

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ASTM symposium probes cement-based materials’ reactivity

Source: ASTM International, West Conshohocken, Pa.  ASTM Committee C09 on Concrete and Concrete Aggregates invites papers for the Symposium on Reactivity Tests for Cement-Based Materials – From Lab Testing to Standards and Specifications, scheduled December 5 amid standards development meetings at the Atlanta Marriott Marquis. Organizers aim to a) provide a forum for experts to discuss standardization and the use…

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New ACI committee advances 3-D printing practice, standards

Sources: American Concrete Institute, Farmington Hills, Mich.; CP staff

The newly formed ACI Committee 564, 3-D Printing with Cementitious Materials will report on three-dimensional printing and additive manufacturing with inorganic cementitious materials, and develop publications on the technology’s applications, challenges and impacts. 

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New ASTM C09 guide gauges mix performance, material compatibility

Sources: ASTM International, West Conshohocken, Pa.; CP staff

ASTM Subcommittee C09.48 on Performance of Cementitious Materials and Admixture Combinations’ working document, WK40615 Guide for Comparing Performance of Concrete Materials Using Mortar Mixtures, standardizes longstanding material-performance investigation protocol.

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Research raises questions on minimum CM specs, supports paste-to-void ratio rationale

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A recent report on results of concrete mixtures testing at National Ready Mixed Concrete Association’s College Park, Md., research laboratory underscores optimized cement paste volume and paste-to-void ratio as key factors behind fresh and hardened specimens’ improved performance characteristics.

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