Tim Gregorski
Tim Gregorski

There are always a number of ideas flying around our editorial offices. Much like the ideas that are floated past you—some ideas are good, and some not so good. There are ideas that eventually take on a life of their own, constantly rearing their head. Others make a casual appearance every so often, reminding you they are still out there.

A couple of years ago, Concrete Construction editors discussed the possibility of conducting a field test involving shrinkage and curling in warehouse floors. An excellent idea with plenty of potential to impact the industry, although one key ingredient was missing—a warehouse floor.

That was until Greg Scurto, president of Scurto Cement, Gilberts, Ill., offered up a 60,000-square-foot floor in a warehouse they were constructing for their own use in Bartlett, Ill.

As soon as we had the floor, the remainder of the project—and the ideas—fell into place. Under the guidance of senior editor Joe Nasvik, several different mix designs were incorporated into the floor. Divided into 10,000-square-foot sections, each received a different mix design. To read the specific details involving our field test, as well as the individual mix designs, see "Researching Warehouse Floors" on page 23 of this issue.

Naturally, curling and movement changes will vary in regard to the specific mix designs, as well as the ambient conditions, and each will be monitored for the next two years. Our goal is to measure shrinkage, plot curling along joint lines, and moisture movement through the floor with different finishes during the curing cycle.

By now the floor has been poured, and our field test has begun. The first measurements were taken at the time of placement in early February. Over the course of the next two years, Concrete Construction will provide Field Test Updates in both the print publication as well as our Web site. First, an article examining the technical aspects of the field test will run in our print edition in June. Additional articles will follow every six months for two years, until we publish the final analyses in 2011.

Periodically, the print edition also will include the latest research data regarding specific elements of the slab, such as the reaction of the mix designs, moisture movement, or other pertinent information. Our frequent online coverage comes to you in the form of videos, slideshows, field test progress notifications, and more.

It must be noted that the field test would not be possible without the generous help of a Steering Group that includes representatives from the Concrete Reinforcing Steel Institute, CTLGroup, Scurto Cement, and Structural Services Inc.

In the end, the goal of this field test is to provide you with useful information for floor construction.