A California Nevada Cement Association (CNCA) roadmap envisions three major pathways for the industry to attain net zero carbon operation by 2045: reducing production process emissions, reducing combustion emissions through fuel switching, and increasing distributed electricity generation. With 11.8 million metric tons’ clinker and 11.45 million metric tons’ grinding capacity in California (per USGS 2017 data), CNCA members can reach…
Read MoreTag: USGS
Interior Department scientists define climate change projection limits
A new report from the U.S. Geological Survey—the indispensable source of portland cement, crushed stone and sand & gravel shipment data—stresses the need to factor uncertainties attending climate change predictions, especially as models link present greenhouse gas emission levels to earth temperature trajectories through the year 2100.
Read MoreU.S. Geological Survey reveals limits of climate change projections
Sources: U.S. Geological Survey, Department of the Interior; CP staff A new report from the USGS—the indispensable source of portland cement, crushed stone and sand & gravel shipment data—stresses the need to factor uncertainties attending climate change predictions, especially as models link present greenhouse gas emission levels to earth temperature trajectories through the year 2100.
Read MoreCrumbling foundations spawn agency’s pyrrhotite-prone aggregate tracing
The U.S. Geological Survey has developed the first map of rock deposits exhibiting the potential to contain or form pyrrhotite, whose presence in otherwise ASTM C33 aggregate can prove extraordinarily deleterious in concrete. The map is part of a new fact sheet, “Pyrrhotite Distribution in the Conterminous United States,” publication of which abides a Congressional directive addressing widespread residential foundation failure cases in Connecticut and Massachusetts.
Read MoreNortheast foundations catastrophe spawns USGS pyrrhotite reference
Sources: U.S. Geological Survey; CP staff
The U.S. Geological Survey has developed the first map of rock deposits exhibiting the potential to contain or form pyrrhotite, whose presence in otherwise ASTM C33 aggregate can prove extraordinarily deleterious in concrete. The map is part of a new fact sheet, “Pyrrhotite Distribution in the Conterminous United States,” whose publication abides a Congressional directive addressing widespread residential foundation failure cases in Connecticut and Massachusetts.
Read MoreSand & gravel production, use survey measures concrete prevalence
Sources: U.S. Geological Survey; CP staff
The annual USGS Mineral Commodity Summaries estimates 2019 construction sand & gravel production at 970 million metric tons, valued at $9 billion and extracted from 6,830 sites operated by 3,870 companies. In order of decreasing tonnage, the lead states for production were Texas, California, Arizona, Minnesota, Michigan, Washington, Ohio, New York, Utah and Colorado—accounting for upward of 55 percent of total U.S. output.
Read MoreUSGS confirms 2018 cement, sand & gravel, stone shipment gains
Sources: U.S. Geological Survey; CP staff
Surveys from the federal agency closest to the construction materials supply chain indicate that portland and blended cement, sand & gravel and crushed stone producers closed 2018 with respective year-over-year shipment gains of 3 percent, 7 percent and 4 percent.
Read MoreProducer fragmentation higher in sand & gravel than crushed stone
Sources: U.S. Geological Survey; CP staff
Top 20 sand & gravel and crushed stone producer rankings from USGS Commodity Specialist Jason Willett show strong contrasts in market concentration and operational scale. Producers on the just-released sand & gravel ranking accounted for 30 percent of shipments in 2016, the most recent year for which consolidated figures are available. For the same period, the agency’s crushed stone ranking showed a) the top 20 producers responsible for 743 million mt or 55 percent of the 2016 U.S. output; and, b) the top 100 operators shipping 1.02 billion mt of crushed limestone and granite, or 75 percent of industry deliveries.
Read MoreOldcastle Materials, Vulcan, Lehigh Hanson lead sand & gravel ranks
Sources: U.S. Geological Survey; CP staff
The top 20 construction sand & gravel producers by volume accounted for 269 million metric tons (mt) or 30 percent of total shipments for 2016, the most recent year for which consolidated figures are available. The top 100 producers on USGS Commodity Specialist Jason Willett’s current ranking combined for 426 million mt, or 48 percent of agency-tracked 2016 sand & gravel production. The top 10 producers are Oldcastle Materials Inc., Vulcan Materials Co., Lehigh Hanson Inc., LafargeHolcim, Cemex USA, MDU/Knife River Corp., Martin Marietta Materials, Granite Construction Inc., Mitsubishi Cement Corp., and Summit Materials.
Read MoreVulcan, Martin Marietta, Oldcastle top USGS crushed stone ranking
Sources: U.S. Geological Survey; Rock Products
The top 20 crushed stone producers accounted for 743 million metric tons, or 55 percent of the 2016 U.S. output, according to a report USGS Commodity Specialist Jason Willet prepared from the most current shipment data available. He also finds that the top 100 operators’ limestone and granite production totaled 1.02 billion mt, or 75 percent of industry shipments, in 2016. The 294 leading companies in his survey, representing 20 percent of operators tracked, were responsible for 1.21 billion mt or 89 percent of output.
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