Eco Material balances SCM portfolio with natural pozzolan mine venture

Sources: Eco Material Technologies, South Jordan, Utah; CP staff Arizona customers and public officials joined Eco Material for a June 21 ribbon cutting at the Kirkland Pozzolan Mine, located in hilly, desert terrain 75 miles northwest of Phoenix. CEO Grant Quasha credited construction and mining teams, as well as plant equipment suppliers, with creating a world class facility—one advancing the…

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Cemex concentrates solar heat for calcining, clinker production first

Sources: Cemex S.A.B. de C.V., Monterrey, Mexico; CP staff In a joint project at the Very High Concentration Solar Tower of Spain’s IMDEA Energy, Cemex and Swiss sustainable fuels specialist Synhelion report processing of the world’s first “solar clinker.” Research and development teams set up a pilot batch production unit to weigh and transfer limestone, clay and other raw feeds…

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Holcim (US) mill goes full bore on portland limestone cement

A Texas concrete materials supply chain fixture, the Holcim (US) Inc. Midlothian plant is the first cement mill in the country to fully convert to production of portland limestone cement (PLC), where fine limestone at 5 percent to 15 percent volumes is ground with clinker. The finished binder exhibits performance comparable to ordinary portland cement, but has a lower embodied…

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Cement developer Hoffmann lands U.S. patent for alkaline powder

After nearly three years of examination, the United States Patent Office has validated the Hoffman Green Cement Technologies H-EVA patent (US 2021/0179492 A1). Promoted as an alternative to portland cement for ready mixed concrete, mortars and plaster, H-EVA encompasses flashed clay sludge, natural or synthetic (flue gas desulphurization) gypsum, plus proprietary chemical “activators and superactivators.” The mineral processing and chemistry…

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Low carbon LC3 binder steers Sika’s next admixture chapter

The Swiss parent company of New Jersey-based Sika Corp. will tailor a new family of concrete admixtures and cement additives around the chemistry and behavior of an emerging binder known as LC3, or Limestone Calcined Clay Cement. Through work with Sika AG and peers, Swiss Federal Institute of Technology officials view the material as a means of carbon footprint reduction…

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Lehigh Redding moves to mill SCM from CO2-rich kiln emissions

Lehigh Hanson Inc. and Fortera Inc., a Silicon Valley technology developer wise to calcium carbonate chemistry and mineralization, are teaming to commercialize a process with optimal output for an era of greenhouse gas scrutiny: Converting the carbon dioxide gas emitted to the environment at the front end, or calcining phase, of ASTM C150 powder production into a blendable supplementary cementitious…

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PCA revises three Industry-Wide EPD, inaugurates Portland-Limestone declaration

New Industry-Wide Environment Product Declarations (IW-EPD) for Portland Cement, Portland-Limestone Cement, Blended Hydraulic Cement and Masonry Cement offer private and public construction interests an exhaustive profile of material, fuel and energy factors attending production of the key ingredient in concrete, grout and mortar. The documents inform updates to companion EPDs that ready mixed and manufactured concrete producers, along with bulk…

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Fly ash use in concrete up slightly; overall ash recycling rate down

Fifty-two percent of the coal ash produced during 2019 was recycled, marking the fifth consecutive year that more than half of the power generating station byproduct in the United States was beneficially used rather than disposed. The volume of fly ash used in concrete, 12.6 million tons, marks a 1 percent increase over 2018 consumption. Year-over-year use of fly ash…

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Eagle Materials outlines proposed cement, wallboard business split

Sources: Eagle Materials Inc., Dallas; CP staff

A strategic portfolio review initiated in early April has spawned a board-approved plan to separate Eagle Materials’ principal businesses, portland cement and wallboard production, into independent, publicly traded corporations. The proposed separation is scheduled for completion during the first half of 2020, and will entail a tax-free spin-off of stock in Heavy Materials and Light Materials entities to Eagle shareholders.

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TRB 2019: Reduce portland cement content by optimizing gradation

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Materials are the critical component of durable transportation infrastructure, and as such got strong coverage at the 99th annual Transportation Research Board meeting earlier this year in Washington, D.C. There, some 12,000 delegates audited presentations in over 800 sessions, which addressed many aspects of transportation design, construction and policy, and encompassed infrastructure built with cast-in-place concrete.

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