Natural Gas – Conversions, Vehicles and Technology

Greencrete First Fleet to Add Kenworth CNG Mixers Into Operations

April 28, 2010

SAN JOSE, CA - Jerry Blatt thinks running CNG-powered Kenworth mixers makes a lot of sense for his company's new division, Greencrete.
"I like the idea of using these compressed natural gas-powered mixers," said Blatt, owner of Sandman Inc., parent company of Greencrete and Star Concrete in San Jose, Calif. Greencrete produces recycled, ready-mix concrete to local homeowners and contractors.
Greencrete recently put into service three, new Kenworth W900S CNG mixers to help deliver the recycled concrete. That made Greencrete the first fleet to incorporate the Kenworth CNG mixers - which came off the production line with Kenworth factory-installed compressed natural gas powertrains - into its operations.
"I have great hopes for this technology," Blatt said. "When we tried out a demonstration model for one week last year we found that the natural gas-powered Kenworth mixer is very quiet. For delivering concrete, particularly in residential areas, that's a big benefit."
Greencrete's natural gas-fueled Kenworth trucks come equipped with the Cummins Westport ISL G engine and Allison automatic transmission. Rated at 320 hp and 1,000 lb-ft of torque, the ISL G uses a maintenance-free, three-way catalyst and is 2010 EPA- and CARB-compliant without the use of selective catalytic reduction (SCR) technology or a diesel particulate filter (DPF).
Blatt said he wanted to try something that would fit his company's emphasis on environmental stewardship. His local Kenworth dealer, NorCal Kenworth, recommended going with CNG due to its wide commercial availability and number of fueling locations in the San Francisco Bay Area.  The company doesn't expect the need for drivers to refuel the mixers while out on deliveries. If such a need does arise, refueling with CNG isn't difficult because it doesn't require special training. 

Blatt said Star Concrete's experience in running diesel-powered Kenworth trucks also played a significant role in choosing factory-built CNG-powered Kenworth trucks for Greencrete. "Kenworths have always been our truck of choice because of their reliability and durability," Blatt said. Star Concrete, the company's other division, delivers concrete from its batch plants to contractors for all types of residential and commercial construction sites in the greater San Jose area.
"We have 54 ready-mix concrete mixers, and 44 of them are Kenworth W900s. We also have 15 line-haul trucks, 12 of which are Kenworth W900s. Over the years, we've found that the infrastructure of a Kenworth truck, its suspension and its frame rails for example, are sturdy and well-built," said Blatt. "Our Kenworth trucks require much less maintenance during their lifetime. That's very important for us because we prefer to keep them for a long time. Our oldest Kenworth mixers, which are 1999 year models, have more than 20,000 hours of operation. And some of our oldest line haul Kenworth trucks have more than a million miles on them," he said. |

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