DEWALT AC100+ Gold® Adhesive Anchoring System and Installations with DEWALT DustX+™ Automatic Dust Extraction
Date: March 1, 2023
Company: DEWALT Anchors & Fasteners
Address: 701 East Joppa Road, Towson, MD 21286
Contact: P: (800) 524-3244 | anchors.DEWALT.com
According to ACI 318-19, Chapter 17 and ACI 318-14 Chapter 17 (and by reference to the 2021 IBC, and the 2018 IBC and 2015 IBC, respectively), adhesive anchors for concrete must be installed using a specific drilling method. This is crucial because the drilling method significantly impacts the bond strength of the installed adhesive anchors, as does the manufacturer-recommended hole cleaning procedure.
Prior to January 2018, DEWALT published bond strengths for AC100+ Gold adhesive anchors based on drilling into concrete and masonry with a hammer-drill and carbide drill bit, followed by traditional hole cleaning (e.g., blowing the hole clean, brushing, and blowing again). DEWALT now offers additional hole drilling and cleaning options due to increased emphasis on dust control solutions on job sites.
DUSTX+ SYSTEM COMPONENTS
The DEWALT DustX+ system allows users to drill holes in concrete and masonry while simultaneously cleaning the holes during the drilling process. This is achieved through hollow drill bits attached to a self-cleaning HEPA vacuum for dust collection. DEWALT has conducted extensive supplemental laboratory testing on AC100+ Gold adhesive anchors installed in holes drilled and cleaned using the DustX+ system in dry concrete.
The table below presents the results of testing the adhesive anchor system with various installation and cleaning methods. It includes the corresponding reduction factor derived from testing, which should be applied to the bond strength when calculating the bond strength capacity for the given adhesive anchor and relevant conditions.
| Adhesive Anchor System | Drilling Method | Cleaning Method | Bond Strength Reduction Factor, Ahdb |
|---|---|---|---|
| DEWALT AC100+ GOLD | Hammer-drilling with standard carbide drill bits | Blow 4x, Brush 4x, Blow 4x | N/A (baseline values) |
| Hammer-drilling with hollow drill bits (DustX+) | Hollow drill bits (DustX+) | 1.0 (no reduction) |
Notes:
- N/A = Not applicable.
- Results are based on tension tests conducted in accordance with ACI 355.4/ASTM E488 in dry cracked and uncracked normal weight concrete. Holes were drilled with a hammer drill and standard carbide drill bit or hollow drill bit, as applicable.
- Standard carbide drill bits and hollow drill bits must meet the requirements of ANSI B212.15. ANSI compliance for hole drilling is required by ICC-ES ESR-2582, ESR-3200 and ESR-4105.
- Refer to published literature for the specific adhesive anchor system for additional design and installation information, available at anchors.DEWALT.com.
AC100+ Gold adhesive anchors achieve published design strengths when installed properly into holes drilled and cleaned in dry concrete and dry masonry using the DustX+ system.
Anchoring and Fastening Systems from DEWALT Anchors & Fasteners
Anchoring and Fastening Systems from DEWALT Anchors & Fasteners
