Concrete Products is the leading source for Concrete Plants, Concrete Mixers, Precast, and Ready Mix news.

Lignin-wise researchers describe new process for concrete-grade plasticizers

Sources: VTT Technical Research Centre Ltd., Finland; CP staff

A research and technology specialist serving Europe’s forest-laden Nordic countries cites a technique to convert lignin, a wood fiber binder and pulp mill byproduct, to a plasticizing agent competitive with synthetic and lignosulphonate-based concrete admixtures.

Read more: Lignin-wise researchers describe new process for concrete-grade plasticizers

PCA, USGS confirm hard figures in 2015 cement, aggregate consumption gains

Sources: U.S. Geological Survey; Portland Cement Association, Skokie, Ill.; CP staff

The recently released PCA U.S. Year-End Report finds 2015 cement consumption rising 3.8 percent above prior year figures, to 105 million short tons, while a companion document from a principal PCA data source—the U.S. Geological Survey—shows a 6 percent increase for construction aggregates shipments over the same window.

Read more: PCA, USGS confirm hard figures in 2015 cement, aggregate consumption gains

Cement Canada EPD covers standard, portland-limestone cements

Sources: CSA Group, Toronto; CP staff

Standards development, testing and certification services provider CSA has registered its first Environmental Product Declaration: “General Use (GU) and Portland-Limestone (GUL) Cements.” The document references (Canadian Standards Association) CSA A3001 product, mirroring ASTM C150 and C1157 plus AASHTO M85 standards, and reflects an industry average of product stage or cradle-to-gate data culled from six Cement Association of Canada (CAC) producer members.

Read more: Cement Canada EPD covers standard, portland-limestone cements

OSHA maps silica standard’s concrete plant compliance costs, target worker groups

Sources: Occupational Safety & Health Administration; CP staff

OSHA’s final Occupational Exposure to Respirable Crystalline Silica rule covers more than two million workers, including 134,600 in the Commerce Department-designated (NACIS) manufacturing segments of Ready Mixed Concrete, Concrete Block & Brick, Concrete Pipe and Other Concrete Products.

Read more: OSHA maps silica standard’s concrete plant compliance costs, target worker groups

Construction, business groups firmly opposed to revised silica exposure rule

Sources: National Ready Mixed Concrete Association, Silver Spring, Md.; National Stone, Sand & Gravel Association, Alexandria, Va.; U.S. Chamber of Commerce, Washington, D.C.

After brief review of a 1,772-page document, NRMCA Compliance and Operations staff reports that concerns the industry voiced in 2013-14 with the Occupational Safety and Health Administration’s proposed Occupational Exposure to Respirable Crystalline Silica rule had carried to a final version. Ahead of compliance assistance materials to be prepared through the NRMCA Operations, Environmental and Safety Committee, staff will update members as the rule’s concrete plant-specific requirements are analyzed.

Read more: Construction, business groups firmly opposed to revised silica exposure rule