I am checking the bond strength of an adhesive anchor, and I noticed that the bond strength increased with cracked concrete and reduced with uncracked concrete. I would expect the opposite to be true. I am wondering why this is the case?
Note:
Cracked Concrete Bond Strength: 87%
Uncracked Concrete Bond Strength: 204%
Hi Steven,
For further assistance, please email your ".pe" file to hnatechnicalservices@hilti.com so that we may analyze your design file.
Regards,
Ashley
Was there any resolution to this question? Comparing the reports for both cracked and uncracked conditions suggests the answer might be in either the tau variable used in ACI 318-19 eqn 17.6.5.2.1 or cNa (eqn 176.5.1.2a), but I'm also seeing psi_cp,Na using the same variables with different results.
I've attached my .pe file.