In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?

Epoxy adhesive is applied in these joints for the following purposes according to International Road Federation (1977):

(i) It seals up the joints completely between precast concrete segments to protect the prestressing tendons;

(ii) By filling voids and irregularities along the segment joints, it helps reduce stress concentrations otherwise it will be developed; and

(iii) It helps in transferring of shear between the joints in case a large single shear key is used.

This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.