That's typical, says Odegaard, since the Drop Hammer breaks from the top down through to the bottom. "For the most part, the surface is left intact, although it's fractured," he says. "The surface is relatively smooth so you can drive back and forth across it without damaging tires or tracks."
The Drop Hammer is suitable for use on skid-steer loaders, compact track loaders and all-wheel steer loaders.
Kenco Slab Crab
Rather than demolish concrete, the Slab Crab bucket can pick up slabs of concrete from 4 to 20 inches thick and from 8 to 12 inches wide, then load them into a flatbed or dump truck to haul away. The attachment features thin, tapered teeth that can slide underneath a slab without damaging the sub-base, explains Tracy Black at Kenco.
"It's a niche product and is quite a bit different than pavement buckets," he says. "A lot of other buckets are open and C-shaped. The Slab Crab is more tight-mouthed, so you can get a good lock on a slab when you're moving it. It doesn't actually grab it — when you slide it underneath the concrete and tilt it back, the weight of the slab locks it into place. It's like a cantilevered effect. You don't have to worry about it dropping or sliding out."
For Fairfield Skanska of Fisherville, VA, the Slab Crab proved to be a cost-effective means to remove the deck of the 52-year-old Southwest Virginia Memorial Bridge, which served as a link between the city of Radford and Fairlawn. The 1,500-foot-long bridge deck was saw cut into 650 slabs, then removed with the Slab Crab. Fairfield Skanska reported it was able to cut its production time in half by using the Slab Crab bucket.
The Slab Crab is available in widths up to 54 inches for 20,000- to 150,000-pound excavators, as well as skid-steer loaders and backhoes.
The PicBucket is a multi-functional percussion bucket that combines the power of a hydraulic hammer with the stripping strength and maneuverability of a conventional bucket, allowing the user to perform demolition and debris removal with one attachment. Flexibility and versatility are enhanced with interchangeable, rapid-action tools for more performance, power, productivity and profitability.
"We've seen contractors get two to three times greater productivity because they don't have to switch between a breaker and a bucket to perform jobs," says Yves Sicotte, PowerTech. "And with this attachment, they can rip, pry and break at different angles, which is something they can't do with a typical breaker."
Enhanced productivity is the most attractive feature for Joel McDowell, fleet planner for MCRC Fleet Services, Lansing (MI) Board of Water and Light. His initial exposure to the PicBucket was through a month-long demonstration. Operators tested the attachment on a Caterpillar 416B backhoe-loader in ground that was backfilled with concrete buried below-grade and in concrete-laden spoils piles.
"For me, it's a productivity issue," he says. "When you have to drop a bucket and switch to a compactor or breaker, you're wasting time. If you have all those tasks incorporated into a bucket and all you have to do is change bits, I see it as a major labor-saving device. And even though it's more expensive than a comparable hammer, the extra cost is offset by higher productivity and less wasted motion."
An added bonus is that it can slice through frozen ground, which can be a major hurdle in northern climates. "Anytime you do anything in the ground in the winter in this area, you have that burden," says McDowell. "Because the V-shaped blade knife of the PicBucket is long and flat, it can slice through that frozen ground."
McDowell also appreciates that operators can pry with the PicBucket. "That can be damaging to a regular hammer," he says. "But this unit is designed for that. The bits are remote from the hammer so the prying force doesn't damage it."
The PicBucket is available in several sizes for backhoes and excavators from 3.5 to 30 tons.