New test stands to increase fly ash marketers’ raw feed sources

Penn State University Department of Civil and Environmental Engineering researchers’ “Evaluation of Two-Atmosphere Thermogravimetric Analysis for Determining the Unburned Carbon Content in Fly Ash” has received the 2019 Outstanding Article Award by the ASTM International Journal of Advances in Civil Engineering Materials.

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3D printing, graphene partners trace rapid building template

A memorandum of understanding sets the stage for GrapheneCA, a New York-based commercial scale producer of graphene, to design an extruder and mixing system that could be embedded into the 3D-printing equipment of Apis Cor Co., San Francisco. Graphene is an advanced carbon agent emanating from nanotechnology and exhibits strong potential as an admixture for high performance concrete.

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CalPortland documents glaring greenhouse gas accounting void

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In a new paper summarizing peer-reviewed scientific studies, CalPortland Co. staff cites the exclusion of a critical factor in global, national, and regional greenhouse gas accounting methods: Concrete buildings, pavements and structures are silently absorbing carbon dioxide from the atmosphere—to such an apparent degree that the built environment represents one of the world’s largest carbon storehouses.

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Architectural precast prospects fuel High Concrete’s $8M plant upgrade

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High Concrete Group, LLC has begun a major production capacity upgrade at its 148-acre headquarters campus in Denver, Pa. An investment up to $8 million in new equipment, processes and facility construction will completely overhaul operations in a bid to extend the producer’s growing presence and influence in architectural precast concrete, including structural and non-structural wall elements, cladding and panels for commercial and institutional building enclosures.

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Hawaii DOT welcomes demonstration of carbon dioxide-injected pavement mixes

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Working with Island Ready-Mix Concrete of Kapolei, the Hawaii Department of Transportation is testing material made with the CarbonCure Technologies process, where industry-sourced carbon dioxide gas is recycled into the mix, imparts strength development and other performance properties, and enables portland cement optimization. As demonstrated in 100-plus ready mixed plants on the mainland, the process entails conversion of the greenhouse gas into a mineral form, permanently embedded in a concrete slab or structure.

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