ASTM C01/09 eye additive construction, 3D-printed material standards

Sources: ASTM International, West Conshohocken, Pa.; CP staff

ASTM International Committees C09 on Concrete and Concrete Aggregates and C01 on Cement are accepting candidate paper abstracts for Symposium on Standards Development for Cement and Concrete for Use in Additive Construction. The December 7-8 program will take place at the Renaissance Orlando at SeaWorld in conjunction with semiannual committee meetings.

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EPA clarifies federal vs. state jurisdiction in definitive waters rule

Sources: Environmental Protection Agency; National Association of Home Builders, Washington, D.C.; CP staff

With the backdrop of the 2020 NAHB International Builders’ Show in Las Vegas, EPA Administrator Andrew Wheeler and Assistant Secretary of the Army for Civil Works R.D. James announced the Navigable Waters Protection Rule. A clear definition for “waters of the United States,” it lays to rest one of the most contentious EPA actions—a 2015 Clean Water Act reinterpretation expanding federal authority over bodies of water minuscule and massive—attempted under the Obama administration.  

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‘Protecting the Workforce’ campaign guides OSHA to 50th anniversary

Sources: Occupational Safety and Health Administration; CP staff

OSHA will commemorate the 50th anniversary of the Occupational Safety and Health Act of 1970 with a yearlong celebration of past achievements, current efforts and future initiatives to protect the American workforce. Signed into law by President Richard Nixon on December 29, 1970, the OSH Act was created “to assure safe and healthful working conditions for working men and women,” laying the groundwork for creation of OSHA the following spring. 

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Durability Code anchors ACI Foundation Council Forum program

Source: ACI Foundation, Farmington Hills, Mich. 

A panel presentation, “What the New Durability Code Will Mean to You,” anchors the ACI Foundation’s Strategic Development Council’s Technology Forum 47, February 11-13 at the Wyndham Grand Hotel in Charleston, S.C. ACI Committee 201, Durability member Dr. Lawrence Sutter will moderate a discussion where subject matter experts share knowledge and highlight ACI code from owner, designer, contractor, and researcher perspectives. 

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Lazy river follows hard working finishers


Canobie Lake Park, a hand-built amusement venue in Salem, N.H., opened to the public in 1902 as a trolley park. The original visitor experience featured botanical gardens, a penny arcade, and a few early amusement rides. A wooden roller coaster named the Yankee Cannonball, built in 1936, still draws crowds 83-plus years later. In 1958, Canobie Lake Park was purchased by three close friends from New Jersey who decided to take on the challenge of renovating and revitalizing it themselves.

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3D printer-ready mixer

Zoomlion Heavy Industry Science & Technology subsidiary m-tec has announced availability of the Duo-mix mortar mixer in North America and Europe. The adaptable machine is designed especially for mortar used in 3D construction printing. It can process all standard dry mortar products ranging from bagged or silo to bucket coat material up to a grain size of 4 mm.

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Crystalline waterproofing systems

Adi-Con CW Plus is a crystalline admixture whose proprietary reactive chemicals integrally waterproof concrete and mortar. Along with products of cement hydration, the chemicals spur formation of a nonsoluble gel throughout the matrix pores and capillary tracts. The admixture reduces concrete permeability; protects surfaces from chloride exposure and carbonation; and, reduces deterioration attributable to chemical attack and reinforcing steel corrosion.

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Injection epoxies

Tested to the latest ASTM standards, a new CI family of crack injection epoxies offers viscosity range and accelerated cure times, and can be installed at temperatures between 40°F and 110°F to meet real-world concrete repair demands. The company has concurrently upgraded its suite of dispensing tools and injection systems to help make applications fast, easy, and clean for contractors on the move. From hairline cracks to wider concrete fractures, crack injection repair products are designed for both cartridge and pump applications to suit a variety of jobs. Products have been formulated for retrofit or repair work in light structural, tilt-up, water treatment, bridge and marine, plus commercial construction and restoration projects.

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