Halverson’s experience as a concrete finisher spans 30 years and covers foundations to high-rises. He was a partner in a high-rise and structural company, owned his own commercial and residential concrete company, and in 1999 settled into the field of decorative concrete. Twelve years later, SSI is proving to be his most loved effort. “Being able to play with artistic components adds a new excitement to an old friend,” he says. The company employs 12 people and performs a wide range of commercial and residential decorative concrete work. SSI has had 12 straight years of growth.
The crew used self-leveling overlays formulated for diamond polishing. They started by attaching aluminum terrazzo strips to the base slab to make a simple pattern. Then they pre-measured equal amounts of overlay cement and recycled multicolored glass particles by weight. Bounded by the terrazzo strips, each area was colored differently with blended integral color. With all the added glass, the mix was no longer self-leveling, but it easily moved into place.
The overlay cement hardened enough overnight for diamond polishing. They used 40- and 80-grit to start and shifted to resin-bond diamond pads—starting with 50-grit and proceeding to 400-grit. The team applied a lithium silicate densifier after 200-grit and then filled small bugholes and finished the polishing.
Halverson’s helpers included Keith Cantillon, Isaul Mendez, and Marco Perez. They worked hard to get this 15-hour project done so quickly; the job normally takes four or five days. He credits this to using overlay cements adapted for diamond polishing.
View the other 2011 Artistry in Decorative Concrete participants and projects.