An Alliance Auto Parts warehouse job in North Little Rock that used some 4,000 cubic yards of Razorback concrete utilized some of the latest concrete-finishing technology.
The concrete contractor, Bowman Works, Eads, Tenn., used a 3-D laser screed profiler and a robotic geodemeter to optimize the slope for paved areas around the 105,000-square foot structure. Readings generated by the laser are transmitted to the screed from a computer, allowing concrete to be tilled at a precise slope to produce proper drainage.
The 3-D laser is more common. It’s a higher-tech way of doing things on a 3-D type grade, instead of one where there’s a one slope or a dual slope. It allows us to place the concrete precisely without the hand work.
said Bowman superintendent John Chaney.
In using a 3-D laser screed, Bowman says the concrete supplier’s knowledge and skill is essential. “Razorback had to understand the design and be able to assist us, and they were available with whatever we needed,” he noted.
Steve Horton, who supervised the job for Razorback, said some 1,500 cubic yards of concrete were poured for the exterior paving. The balance was allocated to foundation, slab and tilt-wall work. Concrete was poured to form some 55 tilt-wall panels, 35-feet high and 25-feet wide.
Razorback’s North Little Rock plant supplied the job, which required about a dozen trucks.
The project, handled by general contractor Dave Grundfest Co., Little Rock, broke ground in May 2006 and was completed in December.
Pat Bettis, Grundfest’s superintendent on the job, was especially intrigued with the technology used in the concrete work and pleased with the finished quality.
That was the first we’ve seen of a 3-D screed,” he said. “The site didn’t provide us with much drainage slope for the parking area, and if we had done the work by hand we would have ended up with a lot of puddling. Now it’s contoured correctly.