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Recycling and reusing demolition debris

Learn how a tracked impact crusher is saving transport costs and producing high-quality aggregates for an East Coast demolition project.

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At a recent project, the R1100S recycled mainly concrete with a feed size of up to 20 in., crushing it down to 1.25 in. Photo: Rockster

As a longtime Rockster distributor on the East Coast, Equip Sales & Leasing Corp. has played a pivotal role in building a customer base for Rockster crushers. The distributor also enabled the realization of many projects with its rental program.

A recent project commissioned in New Haven, Connecticut, for example, aimed to demolish several low-income houses to make room for new ones.

As a specialist in demolition and construction, SRC Construction was appointed contractor. A returning customer of Equip Sales & Leasing, SRC is familiar with Rockster machines and decided to go with the company’s R1100S track-mounted impactor.

On-site application

One of the main questions when it comes to demolition projects is where to put all the material.

In order to minimize costs for transport and depositing material, some operations recycle it on spot and others transport it from the demolition site. For the project in New Haven, recycling and reusing the final material on-site proved to be an efficient and cost-effective solution.

Not only were costs saved, but added value was realized in the production of aggregates on-site, Rockster says. Recycled concrete with a feed size of up to 20 in. was recycled to a 1.25-in. final product and later used for new building sub-base.

The Rockster R1100S, driven by a 380-hp Cat engine in combination with a hydrostatic drive system, continuously processed about 1,400 tpd and completed the project in just a month, according to Rockster.

Dust suppression system

The demolition site was located in a residential area and across the street from a school. In residential locations like this, Rockster says a dust suppression system is a must.

Tim Borrelli, an operator with Equip Sales & Leasing that oversaw the project, says the dust suppression on-site performed well with the Rockster crusher.

“The Rockster R1100S was perfect for this job,” Borrelli says. “It was across from a school, so the impactor performed great with the dust suppression system. No dust contaminants left the job site.”

Flexibility & mobility

Rockster says two of the main advantages the R1100S offers are its compact size and the resulting mobility. Along with its compact dimensions and weight, the R1100S makes transport from one jobsite to another economical
and productive, the company adds.

This was the case with the project in New Haven where the crusher needed to move. Its track-mounted system and radio remote control made operation easier, Rockster says.

Standard equipment on the R1100S includes a vibration feeder with a prescreen, an adjustable bypass chute, crusher overload protection, sound-insulated engine housing and a central control unit with color display. Rockster says these features add to the convenience and ease of operating a Rockster crusher.

“The R1100S is equipped with a standard magnetic separator,” Borrelli says. “That way I know the iron rebar from the reinforced concrete will be removed and the customer is getting clean material.”

Information for this article provided by Rockster.