Tag: crushed stone: Page 4

Technology

John Deere 750K Dozer

The new 750K crawler dozer features a John Deere PowerTech™ 6.8-L IT4 diesel engine that provides 155-165 hp at 1,800 rpm. A hydrostatic transmission gives customers infinite speed control, power management, live power turns, counter rotation while staying in gear, and dynamic braking. A hydraulically driven cool-on-demand fan operates only as needed, decreases cab and […]

March 21, 2012

Roadbuilding

Section 103(k) Shutdowns

MSHA’s expansive use of Section 103(k) orders is a derogation of the purpose and intent of an enforcement tool.

March 21, 2012

Safety

Section 103(k) Shutdowns

MSHA’s expansive use of Section 103(k) orders is a derogation of the purpose and intent of an enforcement tool In the last year, the Federal Mine Safety and Health Administration has shut down several mines and imposed significant operating costs on mine operators by expanding the scope and use of Section 103(k) orders. This troubling […]

March 21, 2012

Roadbuilding

The Nation’s Top 25 Construction Aggregates Producers

In 2010, the market appeared to bottom out with production continuing its downward trend and average unit values down for the first time since 1998.

March 21, 2012

Roadbuilding

AGG1: Something Old, Something New

A hard-hit construction industry makes it tough to grow a show, but the 3-year-old AGG1 is creating a place for education and the latest innovations.

March 21, 2012

Business

AGG1: Something Old, Something New

A hard-hit construction industry makes it tough to grow a show, but the 3-year-old AGG1 is creating a place for education and the latest innovations.   Now in its third year, the AGG1 trade show may be in a holding pattern in terms of growth, but it’s setting a record in exhibitor square footage. The […]

March 21, 2012

Roadbuilding

Joints, Humpback Whales and Quarries

Knowledge of geological joints is essential in assuring the economic extraction of crushed stone from quarries, and detailed studies of joints and other planes of weakness should be included in the exploration and quarrying process.

March 21, 2012

Home

Joints, Humpback Whales and Quarries

Knowledge of geological joints is essential in assuring the economic extraction of crushed stone from quarries, and detailed studies of joints and other planes of weakness should be included in the exploration and quarrying process.   A few years ago, I had the pleasure of being a keynote speaker at the annual meeting of the […]

March 21, 2012

Roadbuilding

Road Science Tutorial

A strong foundation is the key to a strong pavement structure.

May 9, 2011

Home

Polaris Minerals Q2 results = $4.72 million

Canada-based Polaris Minerals Corp. on Aug. 9 reported financial results for the quarter ended June 30, 2010. (Note: All financial results are in U.S. dollars unless otherwise noted.) Sales in the second quarter of 2010 were 344,000 tons generating revenue of $4.72 million, compared to sales of 487,000 tons and revenue of $6.22 million in […]

August 9, 2010

Maintenance

Granite Construction’s Liberty Quarry could mean millions for California

Granite Construction’s proposed Liberty Quarry would help refill California’s depleted coffers, pouring millions of dollars into state and local governments and helping to fund the struggling California State Teachers Retirement System. The nearly bankrupt Golden State is facing a $20 billion budget shortfall in the next fiscal year, and state leaders are scrambling to bolster […]

July 6, 2010

Roadbuilding

INDOT new paving specs allow more RAP

In honor of Earth Day, the Indiana Department of Transportation (INDOT) announces new paving specifications that allow for additional use of recycled materials. By increasing the amount of reclaimed asphalt pavement and recycled roofing shingles within asphalt mixes, INDOT anticipates it can save $10 million to $15 million on annual paving expenses. Both reclaimed asphalt […]

April 22, 2010