September 18, 2021 from 10:30am to 11:30am Central Standard Time
Measuring the unintended impact of chemical curing agents, bond breakers, and densifiers on concrete surface free energy.
Tilt projects can be a series of conflicting goals. Maybe non-more prevalent than a perfect concrete slab for casting beautiful panels and using adhesives to bond forming materials. Building owners want tight, densified concrete slabs and tilt-contractors want to get the project moving minimizing steps and slab curing times. So, as an industry we have turned to chemicals to get the job done. Densifiers are more prevalent and bond breakers are being used as curing compounds. Unfortunately, both of these solutions negatively impact the concrete’s surface free energy, in other words “it makes the glue not work.”
Over the last year, GluDown has been researching ways to accurately measure concrete slab surface free energy, identify potential challenges from these measurements, and provide corrective actions for glue down job success. We will present these findings to the TCA to open the industry’s eyes to this challenge, hopefully generate discussion on how to use this information, and ultimately create specifications which will better tilt-up forming practices.