ABSTRACT
Several fracture replicas were prepared from a single rough concrete fracture surface. A silicone rubber compound (Smooth-On Mold Max 40®) was cast over the concrete surface to form the negative surface. Once cured, a polyester resin was cast over the silicone rubber to create the positive fracture surface mould. To create the joint replica specimens, a cement material (King Flow Stone®) was cast within a 6 × 6 cm area of silicone and polyester moulds. Materials testing on the cement material showed a compressive strength (σci) of 26.4 MPa, tensile strength (σt) of 1.8 MPa, and Young’s Modulus (E) of 10.3 GPa. A basic friction angle (φb) of 32◦ was assessed via tilt and direct shear testing of flat polished material surfaces.
