Presentation Description:
Adhesive anchoring is a widely used technique for connecting structural and non-structural elements to concrete and masonry, offering high load capacity and design flexibility. However, the productivity and reliability of adhesive anchoring systems are strongly influenced by environmental and installation conditions. Together we’ll examine how three key jobsite factors: temperature, moisture conditions, and installation practices, can dramatically alter adhesive anchoring performance if such factors are not properly accounted for in engineering design. Extended curing times or too short working times from cold or hot working conditions can impact adhesive installation, jobsite timelines, and bond strength of the adhesive. Dry concrete, water-saturated concrete, and water-filled holes may have different strength reduction factors which can impact the bond strength of the adhesive and may cause jobsite issues. Installation methods, such as hammer drilling or core drilling, can correspond to different bond capacities used in design. Adhesive sensitivity to hole preparation and cleanliness corresponds to varying strength reduction factors relating to reliability of the adhesive. This presentation emphasizes practical implications for design, installation, and quality assurance to ensure reliable adhesive anchoring under variable field conditions.
About the Presenter:
John E. McShain, P.E. is the Division Technical Services Manager for Hilti North America covering the Central U.S. market. He has over 25 years of experience in the engineering design and construction industry focused on both commercial and civil/infrastructure projects. Since joining Hilti in 2007, John has educated specifiers and contractors about concrete anchorage through his various roles as a field engineer, engineering manager, marketing manager, and director of project management. Prior to Hilti, John was a project engineer and construction manager for Freese & Nichols, Inc. John earned his bachelor’s degree in Civil Engineering from the University of Texas at Austin. He is a licensed professional engineer in the state of Texas.
Michael A. Clemente, P.E. is the Structural Field Engineer for Hilti North America covering the Dallas and East Texas markets. Prior to joining Hilti, he has 7+ years of experience in engineering design working as a Geo-structural Engineer for Mueser Rutledge Consulting Engineers, PLLC in New York City and as a Structural Engineer for Ponce-Fuess Engineering, LLC and Martinez Moore Engineers, LLC in Dallas. Since joining Hilti in 2023, he has partnered with engineers and specifiers to solve complex challenges using Hilti solutions and has assisted contractors to build smarter, stronger, and more sustainably. Mike earned his bachelor’s degree in Civil Engineering from Marquette University and his master’s degree in Civil Engineering from the University of Texas at Austin. He is a licensed professional engineer in the state of Texas.