Portland-limestone cement reaches universal state DOT approval

Portland Cement Association reports across the board state agency approval of portland-limestone cement, or ASTM C595 Type IL binder, on the heels of a Connecticut Department of Transportation green light for the material. Compared to ASTM C150 Type I/II portland cement, PLC is finished with higher limestone content, while exhibiting a carbon dioxide emissions footprint up to 10 percent lower.…

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Master Builders rheology conditioner eases Type IL concrete mix work

Sources: Master Builders Solutions, Beechwood, Ohio; CP staff World of Concrete 2024 marked the formal North American market debut of Master Builders Solutions’ MasterEase, a next generation rheology-modifying, water-reducing admixture. Recently developed polymers enable the new ASTM C494 Type A agent to lower concrete viscosity compared to prior water reducing admixtures. The polymers reduce yield stress, the main indicator of…

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ACI 302, ASCC survey stakeholders on portland-limestone cement mixes

Sources: American Concrete Institute, Farmington Hills, Mich.; CP staff American Concrete Institute Committee 302, Construction of Concrete Floors, and the American Society of Concrete Contractors are inviting practitioners to share their experiences placing and finishing mixes bearing ASTM C595, Type IL portland-limestone cement (PLC). Their 15-question survey, posted here, launches as cement producers rapidly roll out Type IL—typically ground clinker plus…

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Cement, concrete producers stay in front of proposed climate rule

Environmental Protection Agency reporting measures and market mechanisms like the U.S. Green Building Council LEED rating system could position publicly traded portland cement, concrete and aggregate producers for seamless compliance with a proposed U.S. Securities and Exchange Commission rule on greenhouse gas (GHG) emissions and global warming risk disclosures. The subject of a public comment period closing this month, the…

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Sound carbon guidance

By Don Marsh An energy market-driven nonprofit, RMI, offers credible perspective in its just-released Concrete Solutions Guide, geared to construction interests taking stock of the carbon dioxide emissions factor behind their project materials, products and methods. Posted at www.rmi.org, the document presents specific opportunities for “a nearly ubiquitous material with a sizable climate impact” and expands on the need to…

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Concrete, cement producers and allies reinforce SCC, Sustainability program

Source: CP staff

The co-located 6th North American Conference on Self-Consolidating Concrete (SCC2016) and 11th International Concrete Sustainability Conferences will draw some of the world’s leading authorities on high performance materials and sustainable practices. Key suppliers and service providers to North American concrete producers will contribute to a deep program, speakers and presentations including:

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Cement producers maintain lead in Energy Star-certified manufacturing plants

Sources: Environmental Protection Agency; CP staff

Twenty-seven portland cement operations are among 70 manufacturing plants to achieve EPA Energy Star certification in 2015. Producers recognized for energy performance in the top 25 percent of the industry are Holcim (five plants); Buzzi Unicem, Cemex USA and Lehigh Cement (four plants); Argos USA, Essroc Cement and Titan America (two plants); plus, Ash Grove Cement, CalPortland Co., Martin Marietta Materials, Salt River Materials and Suwannee American (one plant).

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Evidence dearth sinks antitrust inquiry of European cement leaders

Sources: European Commission, Brussels; CP staff

Citing “evidence not sufficiently conclusive,” the European Commission has closed a four-and-a-half-year investigation of integrated cement and concrete producers serving Austria, Belgium, Czech Republic, France, Germany, Italy, Luxembourg, The Netherlands, Spain and United Kingdom.

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