Abstract: This paper presents an experimental study on the adhesive bonding properties between new rubber concrete and old ordinary concrete under slant shear, including the effects of particle size, dosage, and interfacial agent on the adhesive properties. Test results show that this adhesive strength of two bonded specimens has an inverse relationship with the diameter of rubber particles, and has insignificant correlation with rubber content, though it decreases when increasing the content. Compared with cement paste interfacial agent or no agent coating, the new epoxy interfacial agent obviously improves the adhesive strength. The effect of compound modification on the adhesive strength is related to the diameter of the rubber particles.

Key words: rubber concrete, bonding between new and old concrete, slant shear strength, adhesion agent, compound modification