ASTM Subcommittee C09.49 on Pervious Concrete has two proposed standards in the works: WK29212, Test Method for Hardened Density of Pervious Concrete, and ASTM WK29213, Test Method for Compressive Strength of Pervious Concrete
Read MoreMonth: October 2010
Astm Revises Standards For Ready-Mixed Concrete
A heavily revised fourth edition of ASTM Standards for Ready-Mixed Concrete includes 38 ASTM standards, the Metric Practice Guide of Concrete and Concrete Aggregates, and the Manual of Aggregate and Concrete Testing. It features the principal specifications and test methods referenced in two benchmarks for cast-in-place construction
Read MoreImi, Cemex Pros Take Nrmca National Mixer Driver Championship
Irving Materials’ Trent Slaven and Charles Klein finished first and second, respectively, and Cemex’s Jason Dilling third, in the National Mixer Driver Championship, staged with NRMCA’s ConcreteWorks Conference & Expo, October 10-12 in Concord, N.C.
Read MorePca Honors Rcc, Pervious Pavement-Wise Officials, Agencies
Five public officials or agencies responsible for specifying roller compacted concrete (RCC) or pervious concrete pavement, or cement-based, full-depth reclamation methods as part of cost-effective and sustainable infrastructure development policies are honored in PCA’s third annual Sustainable Leadership Award program
Read MorePresident Obama Assesses Small Business Jobs Act, Depreciation Incentives From Maier Block Perch
Amid loaded concrete masonry unit curing racks at the Bladensburg, Md., operation of NCMA member Ernest Maier, President Barack Obama reflected on the October 8 release of prior-month employment figures, underscoring September’s 64,000-job private sector gain offset by higher public-sector payroll losses
Read MoreCemex To Exercise Ready Mix Usa Buyout Option
Cemex has announced a September 2011 target to acquire its partner’s stake in two joint ventures with Ready Mix USA. A methodology for determining the buyout value brings the deal to an estimated $360 million, plus assumption of approximately $17 million in net debt
Read MoreSummit Materials Adds Con-Agg, Altaview To Missouri, Utah Platforms
This year’s most active U.S. construction materials deal maker, Summit has added ready mixed and aggregate properties in markets where it only recently staked claim, closing on Con-Agg of MO, LLC in Columbia, Mo., and Altaview Concrete Inc. in Sandy, Utah
Read MoreHdpe Pipe Failure Spawns Costly Texas Fish Hatchery Drainage Replacement
The John D. Parker East Texas Fish Hatchery, scheduled for an early-2011 stocking, is the latest major instance of high-density polyethylene pipe failure. Sections of 60-in. and 48-in. diameter corrugated HDPE drainage structure collapsed under 10 to 17 ft. of earth fill, and an 11,000-ft. stretch of the flexible pipe was determined
Read MoreFhwa Approaches Hoover Dam Bypass Opening With Ceremonial Roadway Walk
“Bridging America” is the theme of an October 16 pedestrian event at the centerpiece of the U.S. 93 Hoover Dam Bypass: the Colorado River Bridge, whose 1,900-ft. roadway soars 900 ft. above the Black Canyon and bears on prolific twin concrete arches. The structure consists of segmental cast-in-place and precast concrete arch members, spandrel columns and piers
Read MoreLabor Board Eases Redress For Employees Fired During Organizing Campaigns
When charges filed in connection with employee terminations amid union organizing campaigns are found meritorious, the NLRB general counsel’s office will now consider seeking a federal 10(j) injunction compelling an employer to offer worker reinstatement pending litigation of the underlying unfair labor practice case
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