Can you please provide us with the ultimate compressive strength of the resins products you are providing for filling annular gaps as our structural engineer need to choose which product to use?
Thank you for your question. The HIT RE500V4 resin has a compression strength > 100N/mm2 whilst the HY200A mortar > 95N/mm2 I would suggest contacting your local HILTI technical department for further discussion regarding your specific application details.
The compressive strengths of the resins have been tested in accordance with ISO604.
In relation to filling of the annular gaps the following may be adopted based upon our own in-house test results. HY200A anchor diameter plus 5mm, RE500V4 anchor diameter plus 8mm.
We have not tested for annular gaps above these sizes and outside of this range specific testing must be performed.
We have a 10mm grout zone between our plate a the slab soffit we are fixing into. We have to use the SOFA method due to the non standard bolt arrangement we have. The contractor has pointed out that filled annular gaps cannot be achieved with a grouted stand off. They are suggesting sealing the inlet holes to the fasteners and using a low viscosity grout, allowing this to fill the annular gap instead.
Why is it that the 2 resins above are specified over any other grout/resin? The proposed grout has a compressive strength of 56N/mm2, will this be an issue? There is a significant shear in the plane of the plate, which by our quick calcs would result in a compressive stress on the annular gap filling of circa 320N/mm2, well in excess of the Hilti Resins, however this was not flagged in Profis. In our case, the filling will be confined in all directions, so theoretically cannot crush - would you agree?
Are there any other considerations you would make regarding this proposal?