Sustainability

The Rasmussen Group companies take pride in the positive impact we have made on the communities in which we work. We practice the principal of sustainability – the capacity to endure.

Wind EnergyOur companies continually improve their practices to use our resources responsibly. Enduring through a century of adaptations is testament to our capability to engineer by innovation.

We feel fortunate to be servicing the wind energy sector with the Rasmussen Group companies, helping Iowa sustain its number two ranking in the country for wind energy production. From Jensen Crane Services erecting the tower, to one of our heavy haulers delivering the towers to the jobsite, all of our companies have been involved with the maintenance or new construction of a wind tower.

Below are a few instances that The Rasmussen Group has taken to be good stewards to the land and use our resources responsibly.


Hallett WetlandsHallett Materials Texas Provides a Wetland Area and Reduces Emissions

Located in an environmentally sensitive area northeast of Houston referred to as the “little thicket”, Hallett respects that there must be a balance between development and preservation. In our efforts to maintain this balance, we have committed 185 acres along the San Jacinto River into a conservation easement at our Porter location. Within the 185-acre tract, we have created over six acres of forested wetlands in which we have planted 2,000 Bald Cypress and Green Ash saplings. We have also created ten acres of herbaceous wetlands along with preserving nearly thirty acres of existing wetlands, including the largest Bald Cypress tree in Montgomery County.

In the spring of 2009, Hallett Materials replaced the diesel-powered engine on our Porter dredge with a state of the art electric powered system. The results have been phenomenal; we are able to maintain ample power for the dredge, while vastly reducing our diesel emissions.

We at Hallett Materials – Texas Division strive hard to be good stewards of the land. Our goal at Hallett Materials is to continue to be an industry leader in both innovation as well as environmental sustainability for future generations.


Grimes MagnetGrimes Asphalt and Paving Recycles

The Terex plant at the Grimes plant location has recently seen green improvements and none are as impressive and effective as the method for adding recycled asphalt into the mix. A design of bins, conveyors, crushers, and screens make up the system that allows for the use of recycled asphalt (RAP) into the Hot Mix Asphalt (HMA).

The larger material is sorted out and re-crushed later. The material then travels on a flat conveyor from the bin to another conveyor belt that transports the raw RAP to a small crusher, the RAP wrangler, which breaks up larger pieces of material that made it through the initial screen. The RAP then goes up a third conveyor to a scalper. The scalper has a one-inch screen that is tilted at a 45-degree angle and shakes. The shaking motion rattles material larger than an inch in size downhill while the larger material falls off the edges and piles up under the Scalper. Foreign matter that may be in the tear out, such as wood or geo-fabric, rattles off the scalper and is discarded. The waste is minimal.

Once through the Scalper, the RAP makes its final ascent up a 50-foot conveyor and falls into the RAP chute. THE RAP chute connects to the mixing drum behind the burner. The RAP is mixed in with the hot aggregate and Binder. The finished mix is rolled into the Slat Conveyor and transported into trucks. The Hot Mix Asphalt is then off to a job.

Last season Grimes incorporated nearly 22% of recycled Asphalt into the mix they produced.


LEED BuildingCentral Iowa Ready Mix provides Ready Mix to the Largest LEED Platinum Certified Building to Date

The Wellmark Blue Cross/Blue Sheild building in downtown Des Moines, IA is the first LEED Platinum certified building of its size in the world. Central Iowa Ready mix was a proud collaborator on this project.

CIRM provided several different high quality mix designs in to partner in this achievement, pouring over 30,000 cubic yards (cys) of concrete in total. Not only did CIRM contribute to the LEED credits, we also utilized many different high-tech mix designs in the 600,000 square foot building. Pouring 8,000 cys of lightweight concrete, along with nearly 6,000 cys of post tension mix with a corrosion inhibitor admixture and 5,000 cys of intrusion piles.


Green and Main Project Des Moines, IA

Once a historic building in Sherman Hill, the Green and Main renovation has obtained Platinum LEED certified classification. The Rasmussen Group is proud to supply ready mix for Green & Main along with construction services needed to assist in the project’s success.