Transit Mix Concrete and Materials, partnering with its chemical admixtures supplier, Degussa Admixtures, designed and produced the concrete mix used for the “2 Hour House” in a subdivision of Tyler, Texas. Using the latest materials and technologies—and the skills and innovation of the local building community—to try to construct a home from the ground up in less than two and a half hours, two competing teams each built a 2160-square-foot concrete slab home, fully landscaped, with 1637 square feet of living area, three bedrooms, two baths, and a two-car garage. Thousands of volunteers constructed the homes. The two homes will be sold, with 100 percent of the profits donated to worthy causes in the Tyler area.

“Our challenge in this project was to design and produce a concrete mix that would reach initial set in 22 minutes,” explained Dick Schilhab, vice president for Transit Mix in East Texas. “We pride ourselves in delivering quality concrete when the project requires. This is no exception.”

The average set time for concrete used in residential construction is 4 to 5 hours. Most of the general public is not aware that the physical crete—both in the plastic and hardened state—can be controlled with chemicals.

They used a slightly modified version of their 4x4 Concrete technology to achieve the 22-minute set. “4x4 Concrete is a combination of admixtures and concrete materials used in rapid setting highway and airport repair applications,” explained Dave Martin of Degussa Admixtures. “4x4 Concrete allows concrete to be placed, set, and open to traffic in 4 hours.”

The project was organized by the Tyler Area Builders Association and sponsored and supported by Admixtures, Inc.; Transit Mix Concrete; Sherwin Williams; TRANE Co.; Price Pfister Faucet Co.; and many other local Tyler Texas corporations.

To learn more about the 2 Hour House, visit the Tyler Area Builders Association Web site at Transit Mix Concrete and Materials can be reached at

For additional information on the admixtures used in the high performance concrete mix design, contact Kelly Mawby at Degussa Admixtures, Inc. ( or 216-839-7071).