Bond strength between geotextiles and concrete

Effect of textile surface treatment on the flexural properties of textile-reinforced cementitious composites

“…To investigate the effect of surface treatment of carbon textile, a peel test was employed. Peel force is the term of the force required to separate the two materials which can provide a good estimate of bonding strength and interfacial fracture energies [22]. The peel test behavior of untreated textile and treated textile is shown in Figure 11.…”

“…To study the effect of textile's fluffy treatment on its bonding quality to the matrix, the common 90 peel test similar to ASTM D6862-11 was used. This test can be used to study of textile bonding strength to the concrete surfaces [22]. Specimens for bond test were prepared by casting 40 mmÂ40 mm concrete blocks directly on top of textile specimens.…”

Flexural performance of wire mesh and geotextile-strengthened reinforced concrete beam

“…Nevertheless, wrapping material and beam need to act monolithically under an applied load to ensure the highest performance [1]. If the concrete is casted only on a geotextile sheet even without any treatment, then applying axial tensile load along the bond of concrete and nonwoven geotextile results in frequent tensile strength failure due to having bond strength more than tensile strength of the geotextile sheet [14]. This phenomenon may be comparable with the failure mode of G3-type beam.…”

“…Most of the studies have used textile mesh with fibers arranged in two or more directions to compose textile mortar or concrete cover along the tension face of RCBs for flexural strengthening [13]. In the present work, nonwoven geotextile fabrics are selected for RCB strengthening, because this type of geotextiles have large fibers and strongly bond with concrete, given a sufficient flow capability [14]. This bond can be easily formed by curing freshly mixed concrete over a geotextile sheet.…”

“…According to Zak et al [10], who found the maximum infiltration of cementitious matrix when its maximum grain size was limited to 0.25 mm. If the mix is compacted through mechanical vibration, then further anchorage would be produced through the infiltration of the cementitious mix, with the fibers in geotextile and concrete, thereby producing an average of 20% improvement in bonding strength [10,14]. Given the low elastic modulus of polypropylene fiber, geotextile fabric reinforcing cannot improve the post cracking characteristics of brittle structures, which results in strain softening in cement composites [12].…”