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Argos USA channels cement kiln-derived CO2 to ready mixed concrete

Sources: CP staff; CarbonCure Technologies, Halifax, N.S.

Argos USA has anchored a five-member consortium targeting a closed loop model of carbon dioxide capture and recycling in cement and concrete production. In an early-2018 demonstration, the company used CO2 from its Calera, Ala., cement plant in commercial concrete produced at its Glenwood, Ga., batch plant. That Atlanta-area ready mixed operation is among nearly 100 sites, primarily in the U.S., equipped with CarbonCure Technologies CO2 storage and injection devices. The CarbonCure process uses the greenhouse gas to promote cement hydration in high to zero slump concrete.

Read more: Argos USA channels cement kiln-derived CO2 to ready mixed concrete

Martin Marietta, Vulcan sales and profits stay in lockstep

Sources: CP staff; Martin Marietta Materials, Raleigh, N.C.; Vulcan Materials Co., Birmingham, Ala.

For a second consecutive year, the industry's top aggregates producers closed 12 months with near-equal financials, albeit from differing levels of sand & gravel, crushed stone, ready mixed concrete, cement and asphalt.

Read more: Martin Marietta, Vulcan sales and profits stay in lockstep

Limestone processor enters concrete market with three calcium carbonate grades

Sources: Huber Carbonates LLC, Atlanta; CP staff

Huber Carbonates launched HuberCrete, a series of ground calcium carbonates for fly ash substitution and self-consolidating concrete mixes, at the 2018 Precast Show in Denver. The product is processed in Prime, Preferred and Extra Fine grades of these respective median particle size and Blaine fineness profiles: 15-24 µm, 300-500 m2/kg; 8-13 µm, 500-700 m2/kg; and 3-5 µm, 700-1,000 m2/kg.

Read more: Limestone processor enters concrete market with three calcium carbonate grades

Caltrans veteran takes helm of lightweight aggregate group

Sources: Expanded Shale, Clay and Slate Institute, Chicago; CP staff

California State University, Fresno College of Engineering Associate Professor Fariborz Tehrani, Ph.D., P.E., has been named Expanded Shale, Clay and Slate Institute director, bringing nearly three decades of structural and geotechnical engineering experience.

Read more: Caltrans veteran takes helm of lightweight aggregate group

Oldcastle Precast, Pomeroy veteran Grafton lands new PCI Operations post

Sources: Precast/Prestressed Concrete Institute, Chicago; CP staff

PCI recently appointed R. Jon Grafton, a certified professional engineer, as director of Operations Services, where he will serve as Business Performance Council staff liaison and contribute to productivity, erector, and safety efforts. He joins PCI with more than 30 years' experience in precast, prestressed concrete, most recently as Oldcastle Precast manager of Business Development. In that role, he pursued design-build projects using precast/prestressed concrete, and helped develop new products that could be marketed throughout the company's 90+ plants across the United States and Canada.

Read more: Oldcastle Precast, Pomeroy veteran Grafton lands new PCI Operations post