A modified slant shear test designed to enforce adhesive failure

Interfacial strength study between a concrete substrate and an innovative sprayed coating

“…The results of this study will be used to assess interface thickness for the numerical study presented in Section 4. However, the coefficient of variation of the experimental results shows quite close results between wire-brushing and sandblasting (8.90 and 8.56%, respectively, according to [12]; 19.36 and 18.40%, respectively, according to [21]). The left as-cast specimens seem to result in higher coefficient of variation and lower bond strength.…”

“…Cohesive failure occurs when at least one of the materials reaches its compressive strength (or tensile strength, depending on the test). Many authors, for example [19], state that cohesive failure only gives a lower estimate value of the interfacial bond strength. Therefore, an adhesive failure is necessary to properly assess the mechanical behaviour of an interface.…”

“…Therefore, an adhesive failure is necessary to properly assess the mechanical behaviour of an interface. The modified slant-shear test proposed by [19] uses steel reinforcement to enforce adhesive failure. According to [17], the slant-shear test can give an estimation of the shear resistance under no normal stress if at least three different interface angles are considered.…”

“…It is used to evaluate the inherent stress concentrations when two materials with a different Young modulus are used. The studies reported in [4,13,19] used a 2D model (a 3D model was used by [21]) and analysed two different concretes, considered as perfect elastic in order to observe the stress distribution at the interface, thus showing the stress concentrations. Fig.…”

Multi-Scale Evaluation of the Interphase Zone between the Overlay and Concrete Substrate: Methods and Descriptors

“…In turn, Sadowski and Hoła [18][19][20][21][22][23][24] proved that predicting the values of f b is possible based on non-destructive testing (NDT) using artificial neural networks (ANN). An evaluation at a lower level of observation mainly involved the observation of the interphase zone and its destruction, which occurred after tests using the pull-off method [25][26][27][28][29][30][31][32][33][34][35] and also bending [36][37][38][39][40], shear [26,34,39,[41][42][43][44][45][46][47][48][49][50][51][52][53][54], flexural [55,56], direct tensile [57,58], splitting prism [59], splitting tensile [34,46,47,…”