What are the strength requirements for using epoxy to anchor temporary barrier to a bridge deck based off the research report you guys did for WisDOT.
We conducted the epoxy anchor testing in the report using HILTI HIT - RE 500 SD epoxy. This material has a bond strength of 1800 psi. All of the anchor capacities that we calculate or tested in the report are based on that bond strength number. Thus, we it would be reasonable to assume that higher bond strength materials should provide equivalent or better anchorage.
Material Property
Hilti HIT-RE 500 SD
Adhesives Technology HS2000
Adhesives Technology Ultrabond 1
Adhesives Technology Ultrabond 3
Simpson ET
Bond Strength
1,800 psi
(12.4 MPa)
2,400 psi
(16.5 MPa)
1,640 psi
(11.3 MPa)
1,960 psi
(13.5 MPa)
2,030 psi
(14.0 MPa)
Compressive Strength
12,000 psi
(82.7 MPa)
15,260 psi
(105 MPa)
10,990 psi
(75.8 MPa)
10,110 psi
(69.7 MPa)
13,390 psi
(92.3 MPa)
Compressive Modulus
220 ksi
(1.52 GPa)
322 ksi
(2.22 GPa)
214 ksi
(1.48 GPa)
201 ksi
(1.39 GPa)
658 ksi
(4.54 GPa)
Tensile Strength
6,310 psi
(43.5 MPa)
7,080 psi
(48.8 MPa)
6,790 psi
(46.8 MPa)
7,840 psi
(54.1 MPa)
-
Elongation at Break
2.00%
1.50%
1.90%
1.60%
Heat Deflection Temperature
146 °F
(63.3 °C)
152 °F
(66.7 °C)
134 °F
(56.7 °C)
138 °F
(58.9 °C)
168 °F
(75.6 °C)
Bond strength is not the only factor. Concrete strength plays a role as well. The compressive strength of the concrete used in these component tests may be higher than the typical strength of concrete bridge decks. Thus, some decrease in the capacity of the anchors would be expected for lower strength concrete. This decrease in strength would likely be offset to some extent by the presence of reinforcing steel in the bridge deck.
Thanks
Some parts of this site work best with JavaScript enabled.