21. 3D Printing of Concrete: An interesting worldwide trend worth keeping an eye on. “3D concrete printing, when combined with a type of mobile prefabrication center, has the potential to reduce the time needed to create complex elements of buildings from weeks to hours. We expect to achieve a level of quality and efficiency which has never been seen before in construction,” says Skanska’s director of innovation Rob Francis.
22. Concrete Equipment: Laser screeds, early-entry saws, concrete boom pumps and placing booms, robotic demolition equipment, and riding trowels have eased the pain of concrete work and improved the quality. Click here to learn what a concrete construction jobsite looked like in 1956.
23. World of Concrete: WOC is now more than 50 years old and drew more than 60,000 visitors and 1500 exhibitors in February 2016. WOC remains the essential show for concrete construction, although CONEXPO-CON/AGG (coming in March 2017) is bigger every three years.
24. Flat floors and extended joint spacing: The greatest problem in heavy warehouse floors is joint deterioration—get rid of the joints and that problem goes away. Extended joint spacing is being achieved with fiber reinforcement (steel and macrosynthetics), post-tensioning, and shrinkage-compensating concrete.
25. Skilled labor: The industry has a huge group of skilled craftsmen. There are thousands of ACI-certified concrete flatwork finishers in the U.S. and many more skilled craftsmen across the industry.
26. Polished concrete: The nearly maintenance-free polished concrete floor is replacing vinyl, wood, and tile in many applications. It’s a great way to revive and old floor.
27. Insulating concrete forms: ICFs are a simple way to build an energy-efficient concrete building.
28. Evolution: Concrete is evolving, versatile, challenging, exceeding expectations, character-building, inspirational, strong, trend-setting, overcoming obstacles, meeting demand, gratifying, limitless, bountiful, beautiful, and sustainable. —Scott Tarr
29. American Society of Concrete Contractors: In 1994, ASCC had a staff of one and the World of Concrete opening party drew about 25 people. Today, ASCC’s staff includes the executive director (Bev Garnant), a membership director (Todd Scharich), a technical director (Bruce Suprenant), and one full-time and five part-time staff members. The WOC Kick-Off Bash drew almost 500 people this year and more than 250 will attend September’s Annual Conference. ASCC has become the nation’s leading advocate for concrete contractors.
30. Alternative cementitious materials: New binders such as geopolymers, activated slags, metakaolin, activated glass, magnesium silicates, and CO2-cured concrete can replace some or all of the portland cement in concrete and create a denser concrete.