Correlation of constitutive response of hybrid textile reinforced concrete from tensile and flexural tests

Fracture process zone and tensile behavior of blended binders containing limestone powder

“…The constitutive relationship is backcalculated from experimental flexural load-deflection data using closed form moment-curvature equations for a strain softening material. The tensile strength, elastic modulus and the ultimate tensile strains of all the blends are extracted using the methodology presented in [29][30][31][32]. Since it has been reported that tension softening behavior of concrete is related to the characteristics of FPZ ahead of the crack tip [33], extraction of the material constitutive relationship in tension, which is experimentally difficult, is a useful tool to understand the cracking behavior in plain and modified OPC matrices.…”

“…The tension model ( Fig. 12(a)) is characterized by a bi-linear response (tri-linear response has been used for fiber reinforced composites [29,30,32]), with a tensile stiffness E, first cracking tensile strain ε cr , tensile strength σ cr = Eε cr and post-cracking modulus E cr = ηE, with −∞ b η b 0 for strain softening materials. The tension model terminates at an ultimate tensile strain of ε tu = αε cr .…”

“…The approach adopted to extract the tensile response of the mortars follows a methodology described in detail in [29][30][31][32]. Fig.…”

“…The presence of soft(er) limestone particles and ductile clay phase (from metakaolin), which improves the fracture performance of multiple-material binders through improved inelastic energy dissipation [10], influences the FPZ, which is explored in detail. The tensile strengths and the ultimate tensile strains of these systems are extracted via inverse analysis of the flexural load-deflection data using an analytical tension model [29][30][31][32]. The tension-softening response of concrete is related to the FPZ characteristics [33]; thus a quantification of FPZ in such blended binder systems also provides unique indicators of their tensile properties.…”

Development of Effective Textile-Reinforced Concrete Noise Barrier

“…The concrete coverages needed in steel reinforced concrete construction can thus be substantially reduced by employing textile reinforced concrete (Curbach & Scheerer, 2012;. Just a few millimeters minimum concrete cover is necessary to safeguard the transfer of bonding forces between the fine concrete matrix and the textile reinforcement (Mobasher et al, 2014;Curbach et al, 2013). This means that thin-walled, free-formed surfaces can be created with a great degree of lightweight structure that feature low system weight and great slenderness.…”