Multi-sensor evaluation of the concrete within the interlayer bond with regard to pull-off adhesion

Bonded Concrete Overlays: A Brief Discussion on Restrained Shrinkage Deformations and Their Prediction Models

“…For example: A wire-brushed surface has slightly higher effective area than a polished one, yet the difference in tensile stresses during the pull-of test can be significant. Confirmation of the previous observation was also presented by Sadowski, who also took an exposed aggregate surface into consideration, suggesting that exposure of aggregate is more important than the increase of bonded area [12]. Although such statement is supported by an increase in adhesion after polishing of surfaces, it cannot quantitatively involve the effect of laitance removal.…”

Functional and adhesive properties of cement-based overlays modified with amorphous silica nanospheres

“…Figure 6 shows that the highest average value of the pull-off adhesion f b was obtained when the surface of the overlay was shot-blasted, and the lowest when it was patch grabbed (raw). This is confirmed by the statement included in paper [10] , which said that in order to obtain high f b values, it is advantageous to prepare the surface of the substrate using shot-blasting. On the basis of the conducted tests, it was also confirmed that the use of a bonding agent results in an increase in the average value of the pull-off adhesion f b .…”

“…Similarly to paper [10] , the JEOL SEM model JSM-6610A equipped with a tungsten cathode (Tungsten Hairpin Filament) was used for the analysis. A material contrast mode of the BSE (backscattered electron) detector with an accelerating voltage of 20 kV, a beam current of 40 nA and a working distance of 10mm was used to observe the microstructure.…”

“…Until now, it has been shown in literature on the basis of research that the mechanical treatment of the surface of the concrete substrate by shot-blasting improves the level of bonding of the cement mortar overlay with this substrate. [5][6][7] In turn, Silfwerbrand and Beushausen [8] , Silfwerbrand et al [9] and Sadowski et al [10] showed, based on tests, that the removal of the cement laitance from the surface of concrete substrate improves the level of bonding between the cement mortar overlay and the substrate. It is also known from literature that the use of a bonding agent on the surface of the substrate before the application of the overlay improves the level of the bonding between the cement mortar overlay and the concrete substrate.…”

Resistência de aderência de revestimentos de argamassa - contribuição por meio de mapeamento e revisão sistemática de literatura para futuras pesquisas no tema

“…1. As alvenarias de blocos cerâmicos [14-16, 35, 36, 38, 39, 42, 43, 48, 50, 54-57, 61-63, 66, 69, 70, 74, 75, 77, 80, 90, 97, 105-108, 110] e os corpos de prova individuais sobre blocos cerâmicos [18-29, 34, 40, 51, 52, 60, 65, 71, 73, 78, 79, 93, 98, 101, 109] foram os substratos mais empregados nas pesquisas encontradas, seguidos de estruturas de concreto [12,13,17,40,41,45,49,58,62,63,67,76,78,82,94,106,110], alvenarias de blocos de concreto [14, 30, 37, 44, 46, 47, 55, 59, 62-64, 81, 89, 106-108], substratos-padrão [64,83,85,86,92,95,102,112], blocos individuais de concreto [17,40,53,78,84,88,109], alvenaria de/ou blocos de concreto celular autoclavado [14,40], alvenaria de/ou blocos sílicocalcário [14,40] e granito [91].…”