What is the maximum length that a B32 bar could be installed into a hole cored into a 2-4m thick solid clay brick wall? (characteristic compressive capacity around 6MPa). What grout/ resin would you recommend with that? What kind of direct pullout capacity could be achieved?
Thank you for your question. There is no published data for rebar in masonry and the performance of any anchoring system into stone or masonry is very much limited by the base material itself and given the huge variation in types and strengths it is impossible to test every one.
Typically for masonry the HY270 was tested in the largest range of base material up to M16 anchor rod diameter however it is a quick curing resin so is only suitable for much shallower embedment depths than what is proposed.
We do however have another product, (RE500V4), which is an epoxy based product with a high bond strength and as such will bond well to a variety of solid base materials, it has been used in natural stone, rock, and solid masonry applications in the past but there is no published data for this.
A typical application for the RE500V4 is post installed rebar installations into concrete for diameters up to 40mm and embedment depths to 3.2mtrs within the ETA approval documentation.
However due to the nature of the application it would mean suitability testing in the base material should be carried out to establish the allowable resistances in accordance with BS8539:2012
Thanks for the follow query, it really does depend upon the masonry units and also the condition of the structure itself. Assuming good conditions and correct installation ( Including hole cleaning) then from experience the noted load range doesn't appear unrealistic.