Flexural Behavior of RC Slabs Strengthened in Flexure with Basalt Fabric-Reinforced Cementitious Matrix

Abstract

is paper presents both experimental and analytical research results for predicting the flexural capacity of reinforced concrete (RC) slabs strengthened in flexure with basalt fabric-reinforced cementitious matrix (FRCM). A total of 13 specimens were fabricated to evaluate the flexural behavior of RC slabs strengthened with basalt FRCM composite and were tested under fourpoint loading.e fiber type, tensile reinforcement ratio, and the number of fabric layers were chosen as experimental variables. e maximum load of FRCM-strengthened specimens increased from 11.2% to 98.2% relative to the reference specimens. e energy ratio and ductility of the FRCM-strengthened specimens decreased with the higher amount of fabric and tensile reinforcement. e effective stress level of FRCM fabric can be accurately predicted by a bond strength of ACI 549 and Jung's model.

Finite element modelling of reinforced concrete one-way slabs strengthened using basalt textile reinforced mortars

“…The simulated support conditions were modelled as hinge and roller constrained along U1 and U2 directions (X and Y directions). The contact between TRM and concrete interface was modelled as a tie constraint in all the specimens, as no debonding was noticed between TRM and slab as reported in the study (Lee et al, 2018).…”

“…The selected experimental setup consists of Basalt TRM strengthened one-way slabs (Lee et al, 2018). As this data involves Basalt textiles, exploring its applicability is much needed as textiles like PBO and Carbon textiles are the most commonly covered in the literature.…”

“…The weft and warp roving spacing was 15 3 30 mm, respectively, as presented in Figure 2. For more details on this study, the reader can refer to the detailed publication (Lee et al, 2018) and section 3.1 for a typical detailed sketch of the experimental specimens. The specimens' nomenclature has been retained as in the original publication, i.e.…”

“…Numerical studies are an essential tool to obtain different behaviour of the strengthened structures with simple modelling techniques (Jawdhari and Harik, 2018;Mercedes et al, 2021). In addition, experimental data related to strengthened one-way reinforced concrete slabs (Lee et al, 2018) was considered for validation in this paper. A few experimental studies in the literature on strengthened reinforced concrete one-way slabs have been reported using Carbon textile fibres as CTRM, e.g (T€ aljsten and Blanksv€ ard, 2007).…”

Off-Axis Flexural Properties of Multiaxis 3D Basalt Fiber Preform/Cementitious Concretes: Experimental Study

“…It was found that the strain distribution became nonlinear near the maximum flexure load due to fabric–matrix slippages. Basalt fabric-reinforced concrete shows crushing failure in the compression zone after tensile breakages of basalt fiber [ 47 ]. Moreover, carbon and basalt fabric/epoxy-reinforced concrete beams show better load-carrying capacity and ductility due to stiff carbon and flexible basalt fibers in the neat concrete beams [ 48 ].…”