3.2 ADHESIVE ANCHORING SYSTEMS
3.2.1 ADHESIVE ANCHORING SYSTEMS OVERVIEW
HILTI LEADS THE WAY WITH PRODUCTS AND EDUCATION
Hilti leads the way in sharing knowledge and experience by educating users on various aspects of Hilti adhesive anchoring systems . We know the importance of selecting the right adhesive anchor system for a specific application .
When comparing two adhesive anchor systems , users should give special consideration to the following key parameters :
• Moisture condition of the base material
• Allowable or preferred drilling method
• Base material condition ( e . g . cracked concrete )
• Cure time
• Installation procedure
• Bond strength
• Temperature sensitivity
• Creep resistance
• Inspection requirements
FREQUENTLY ASKED QUESTIONS
What is creep ?
Creep is the slow and continuous deformation of a material over time . All materials experience some sort of creep - concrete , steel , stone and adhesive anchor systems . In general , small deformations due to a constant sustained load are typical and creep is only problematic when excessive deformations occur .
• All current Hilti adhesive anchor systems passed the creep test requirements of either ICC-ES AC308 or ICC-ES AC58 .
Does temperature have an effect on adhesive anchor performance ?
Yes , temperature affects an adhesive anchor system throughout its lifetime - from storage to installation and throughout the life cycle of an anchor .
• Temperature is an important factor which influences an adhesive anchor system ’ s strength , cure time , ease of installation and creep performance . Some adhesive anchoring systems are engineered for colder climates and others for warmer climates . High temperatures tend to soften adhesive materials , while cold temperatures might prevent a full cure of the adhesive . Both situations might lead to a reduction in bond strength . Each product will have a different low and high temperature threshold at installation and throughout the service life of the anchor .
How does installation affect adhesive anchors ?
Proper installation is the single most user-influenced factor when it comes to an adhesive anchor system ’ s bond strength and performance .
• Hilti is the only manufacturer that provides the entire solution from drilling and cleaning the hole to injecting adhesive into boreholes as deep as 125-in .
What are ICC-ES AC58 and ICC-ES AC308 ?
ICC-ES AC58 is an acceptance criteria published in 1995 used for evaluating adhesive anchor systems in concrete and masonry base materials . In 2005 , ICC-ES AC308 was published for adhesive anchors in concrete , and ICC-ES AC58 was changed to only address masonry base materials . In general , AC308 improved the testing and assessment of adhesive anchor systems in concrete based on research on the behavior of these systems . AC58 is still the state-of-theart with respect to adhesive anchor systems in masonry .
Hilti has maintained their focus on evaluating adhesive anchor systems to the highest standards . As such , Hilti maintains ICC-ES evaluation reports for adhesive anchors in concrete according to AC308 and in masonry according to AC58 .
30 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2 ADHESIVE ANCHORING SYSTEMS Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458