Monthly Archive for December, 2010

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MIT Research Examines Life-Cycle Assessment of Concrete Roads, Structures

The Massachusetts Institute of Technology (MIT) last week released preliminary research findings that will help set a new standard in life-cycle assessment (LCA) modeling. The studies, which are part of an ongoing research initiative at the MIT Concrete Sustainability Hub, will quantify the cradle-to-grave environmental costs of paving and building materials, and will ultimately result in the most comprehensive LCA model produced to-date.

The study combines data on the full range of environmental costs – construction, maintenance, reconstruction, user, direct, and indirect – with a timeframe that reflects the real world life of pavements and building materials. The research examines a timeframe of 50 years for pavements and 75 years for buildings and provides assessments that align with structures’ actual emission totals over the course of structures’ real world lifetimes.

“This study is unprecedented in that this LCA focuses on the ‘use phase’ of materials – the period between construction and demolition that makes up the actual in-use life of the road or building,” Brian McCarthy, Portland Cement Association (PCA) CEO and president said. “The research represents the best available data on building and paving materials from one of the world’s preeminent institutions of higher learning.”

Initial findings in the Buildings LCA have shown that more than 90 percent of the life-cycle carbon emissions from residential buildings are due to the use or operational phase. The study also showed that in residential structures, the use of insulating concrete forms instead of code compliant wood-framed construction can produce operational energy savings of 20 percent or more, with the highest energy savings occurring in colder climates.

The Highway Pavement LCA showed that for high-volume roads, the use phase of the lifecycle can account for up to 85 percent of total carbon emissions.

MIT is set to release a follow-up study in 2011 that will examine the economic costs to provide the most comprehensive analysis of the total costs of building and paving materials.

Established in 2009 in collaboration with PCA and Ready Mixed Concrete (RMC) Research and Education Foundation, MIT’s Concrete Sustainability Hub is a collaborative effort to integrate the best science on concrete and similar materials into industry practices. The MIT Sustainability Hub includes researchers from MIT’s School of Engineering and School of Architecture and Planning.

CONEXPO-CON/AGG 2011 Offers New, Expanded Education Opportunities

CONEXPO-CON/AGG 2011 attendees will find more industry-focused education at the event than ever before, providing additional value to their show experience.

More than 125 sessions will help contractors, business owners, construction materials producers, end-users and other industry professionals meet the challenges in a changing marketplace. More hands-on workshops will be held, and industry organizations have expanded their certification and examination programs for the convenience of show attendees.

CONEXPO-CON/AGG 2011 will be held March 22-26, 2011 at the Las Vegas Convention Center in Las Vegas, USA.

Select sessions in the CONEXPO-CON/AGG 2011 education program will be conducted with simultaneous Spanish interpretation. Continuing education credits (CEUs) will be offered. Session tickets are available singly or in money-saving packages, and signing up ahead of time saves time and money. See the Education section of the show website for full details.

The comprehensive CONEXPO-CON/AGG 2011 education program emphasizes industry and management issues and trends and applied technology. Education is divided into nine program tracks to help attendees locate topics of most interest to them: aggregates, asphalt, concrete, earthmoving and site development, equipment asset management, management best practices, recycling and sustainability, safety and workforce development/competitive edge.

Sessions are 90 minutes in length and include take-away materials. Show management developed the education program with the assistance of leading construction, manufacturing and producer groups to assure a well-rounded program of relevance to all industry segments.

A “Green Roads Summit” is new for the 2011 show, to provide attendees with insights into the “green highways” movement, including current best practices and future developments. The daylong event, which includes a closing reception, is March 24, 2011 and is open to all show attendees.

To meet the evolving needs of the workplace, Spanish-language leadership and management skills development workshops will be held. And workshops, conducted in English, will help contractors learn basic Spanish, with a focus on industry terminology.

The OSHA 10-Hour Course for Construction Workers will also be held, as will workshops for sales leads generation, electrical diagnostics, advanced hydraulic maintenance and tractor/mower operator safety training.

Conducting industry certification courses and exams at CONEXPO-CON/AGG 2011 are:

  • American Concrete Pumping Association (ACPA)
  • Association of Equipment Management Professionals (AEMP)
  • Interlocking Concrete Pavement Institute (ICPA)
  • National Commission for the Certification of Crane Operators (NCCCO)
  • National Concrete Masonry Association (NCMA)
  • National Ready Mixed Concrete Association (NRMCA)

In addition to education programs targeted to meet industry needs, CONEXPO-CON/AGG features exhibits showcasing the latest industry products and services, including the most advanced product design innovations and technologies, and plenty of networking opportunities with industry experts and peers. For more information on attending or exhibiting, go online to

John Deere Power Systems Announces New 6.8L Generator Drive Emergency Stationary Power Ratings

The PowerTech E 6.8L, 6068HFG82, is the first John Deere engine to carry both Environmental Protection Agency (EPA) Tier 3 Emergency Stationary and European Union (EU) Stage III A certification, with dual frequency ratings of 1800 and 1500 rpm.

“PowerTech E technology is optimized for performance in emergency stationary gen-set applications and provides superior block-loading capability in every operating condition,” said Vincenzo Perrone, power generation business manager for JDPS. “Adopting this 6.8L engine to meet Tier 3 and Stage III A helps the OEM’s reduce their product complexity by offering a standardized solution in a critical range of power nodes and electric frequencies.”

The 212 kWm rating at 1800 rpm is currently available from John Deere with a PowerTech Plus 6.8L engine, but the new engine will provide gen-set owners a competitive advantage by offering a dual frequency PowerTech E engine at the same power level. Before the introduction of these new ratings, the highest PowerTech E 6.8L power rating was 177 kWm at 1800 rpm. The 20 percent power increase from the existing PowerTech E 6.8L platform adds to the JDPS engine lineup that meets power generation needs and emissions regulations worldwide. Gen-set customers can now utilize the PowerTech E platform from 60 – 345 kW with 2.4L, 3.0L, 4.5L, 6.8L and 9.0L displacements.

John Deere’s entire Stage III A lineup employs dual frequency, and the PowerTech E 6.8L is the first Tier 3 engine available with dual frequency that meets both Tier 3 and Stage III A emissions regulations.

Extended emergency standby power ratings for the PowerTech E 6.8L include:

  • 202 kWm @ 1500 rpm (213 – 225 kVA and 170 – 180 kWe)
  • 212 kWm @ 1800 rpm (218 – 230 kVA and 174 – 185 kWe)

The 6068HFG82 is an extension of the Tier 3 6068HF285 engine that is available today and continues to feature a fixed-geometry turbocharger, high-pressure common-rail fuel system, 2-valve cylinder head, air-to-air aftercooling and full-authority electronic controls. Additional features and benefits of the 6068HFG82 include increased power density, dual frequency with the same hardware and software sets, and lower heat rejection allowing the use of a simpler and more economical cooling package.

John Deere’s full lineup of generator-drive engines includes non-emissions certified; European Union Stage II and III A; and U.S. Environmental Protection Agency Tier 1, 2, 3 and Interim Tier 4 models ranging from 2.4L – 13.5L of displacement and covering gen-set ratings from 31 – 473 kW (42 – 634 hp).

John Deere Power Systems Announces New 9.0L Generator Drive Emergency Stationary Power Rating

The new power rating for the PowerTech E 9.0L, 6090HFG86, is 345 kWm at 1800 rpm. This rating offers customers a competitive advantage with a key power node of 300 kWe standby power in a 9.0L displacement.

The 345 kWm rating at 1800 rpm is currently available in the JDPS lineup with a PowerTech Plus 13.5L, but the new PowerTech E 9.0L engine offers increased power density in a smaller package. This rating extends our PowerTech E 9.0L power range from 229 – 315 kWm to 229 – 345 kWm for emergency standby applications in the United States and Canada.

The PowerTech E 9.0L features a fixed-geometry turbocharger, high-pressure common-rail fuel system, 4-valve cylinder head, air-to-air aftercooling and full-authority electronic controls, compact size and increased power density. The engine offers quick-starting and clean-running performance for emergency standby gen-set applications.

“PowerTech E technology is ideal for emergency stationary gen-set applications, delivering performance optimized for these applications and superior block-loading capability in every operating condition,” said Vincenzo Perrone, power generation business manager for JDPS. “The new 9.0L rating offers customers exceptional competitive advantage with increased power density in a compact size, allowing for more installation flexibility.”

John Deere’s full lineup of generator-drive engines includes non-emissions certified; European Union Stage II and Stage III A; and U.S. Environmental Protection Agency Tier 1, 2, 3 and Interim Tier 4 models ranging from 2.4L – 13.5L of displacement and covering gen-set ratings from 31 – 473 kW (42 – 634 hp).

John Deere Power Systems is one of the few manufacturers that build engines exclusively for off-highway applications. This specialization has given John Deere unparalleled experience in developing and packaging generator drive engines that deliver performance, power density, fuel efficiency, reliability, emissions compliance and easy installation. This fact benefits John Deere OEM customers as well as owners of John Deere-powered generators.

Volvo L20F And L25F Join Compact Wheel Loader Lineup

The models offer a compact new design and the power to help operators perform work comfortably, quickly, safely and efficiently.

The latest generation Volvo L20F and L25F compact wheel loaders from Volvo offer greater operator comfort and an improved compact design. The new machines have been developed using extensive feedback from operators around the world. The result is a range that delivers the key requirements of the 50 to 60 horsepower wheel loader class, namely versatility, compact dimensions, ease of operation and flexibility for use with a wide range of attachments for many different applications.

The machine’s compact size helps give all-around visibility and the ability to work in narrow or confined work sites. Servicing is easy, with quick and convenient access to all the main service points, which are located under the protection of the engine hood. The electric circuit board is also located in a safe, protected and easily accessible location. An easy-fill, high-capacity 15.8-gallon fuel tank allows for long work cycles.

The frame concept features an articulating / oscillating joint in the center of the machine between the front and rear frame. This combined with 100 percent operator-selectable differential locks on the front and rear axles as standard, provides each machine with optimal performance, stability and traction when operating on rough terrain. Parallel linkage on both models offers excellent visibility to the attachment.

In addition, the Volvo L20F and L25F have been designed for easy machine operation — a key feature for rental customers — as everyone from expert operators to those with limited experience can quickly become proficient. An optional hand control inch valve permits operators to precisely adapt travel speed to fit the application.

“The new Volvo L20F and L25F models are the result of more than 50 years of wheel loader experience,” said Bernhard Lemling, Volvo wheel loaders product planner. “We brought all the knowledge from our long history into these products.”

Other features

Performance. Powerful, naturally aspirated air / oil cooled Volvo diesel engine complies with EPA Tier 3 standards. Separate working hydraulic pumps improve cycle times because steering actions do not affect the speed of the lifting arm.

Operation. A centrally located dashboard keeps all-important functions within easy view of the operator. An ergonomic, multi-function joystick lever comfortably controls lift, lower, float, forward / backward tilting, forward, neutral, reverse and differential locks. An improved, higher performing ventilating and heating system regulates the temperature for the cab and windows. A one-piece, flat cab floor mat is easy to keep clean.

Safety / security. Entry / exit for the ROPS / FOPS-certified cab is easy with three points of contact for safety. The rounded, compact-designed engine hood provides good visibility to the rear. Lowering the left- and right-hand base line of the front window provides improved visibility to the front wheels. A single key opens all the machine’s locks, providing protection against vandalism and theft.

Attachments. These compact wheel loaders have a standard, third hydraulic circuit for the attachment bracket along with two additional hydraulic quick connectors. A choice of two attachment brackets maximizes use of attachments from other machines, including skid steer loaders and other compact wheel loader models.

L20F L25F
Bucket capacity 0.85 – 1.25 cu yd (0.65 – 0.95 m3) 1.0 – 1.6 cu yd (0.85 – 1.2 m3)
Operating weight 9,945 lb (4,510 kg) 10,650 lb (4,830 kg)
Net engine power 54 hp (40.2 kW) 60 hp (44.7 kW)
Dump height 8 ft 3 in (2,510 mm) 8 ft 2 in (2,490 mm)
Breakout force 6,970 lbf (31 kN) 8,320 lbf (37 kN)
Lifting capacity 6,175 lbf (27 kN) 7,495 lbf (33 kN)