Experimental analysis on bond between PBO-FRCM strengthening materials and concrete

D’Ambrisi, Angelo; Feo, Luciano; Focacci, Francesco

doi:10.1016/j.compositesb.2012.03.011

Cited by 247 publications

(106 citation statements)

References 19 publications

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“…There are many strengthening systems based on cement matrix for RC structures in technical literature such as the textile reinforced concrete (TRC) (Bruckner et al 2005); the textile reinforced mortar (TRM) (Triantafillou 2005); the fiber reinforced concrete (FRC) (Wu and Sun 2005); the mineral based composites (MBC) (Taljsten and Blanksvard 2007) and the fiber reinforced cementitious mortar (FRCM) (Bisby et al 2011, Ombres 2011a, 2011b, D'Ambrisi et al 2012a, 2012b, 2013. A comprehensive test program has been conducted to evaluate the performance of different cement-based inorganic pastes towards the development of fiber reinforced inorganic polymer (FRIP) composite (Dai et al 2014) The bond between the strengthening material and the concrete substrate is the key determining factor for the effectiveness of any strengthening systems.…”

Section: Introductionmentioning

confidence: 99%

Investigation of The Bond Behaviour Between PBO-FRCM Strengthening Material and Concrete

Tran

Stitmannaithum

Ueda

2014

ACT

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Fiber reinforced cementitious mortar (FRCM) systems, innovative strengthening systems, for repairing and strengthening concrete and masonry structures are an alternative option to traditional techniques such as fiber reinforced polymers (FRPs), steel plated bonding, and section enlargement. In this paper, a FRCM strengthening system made of polypara phenylene benzobisoxazole (PBO) fiber mesh embedded in cementitious matrix and bonded to concrete is investigated. There are two main parts in this paper: (i) the effective bond length of PBO mesh in PBO-FRCM system and (ii) the bond stress-slip relationship between PBO mesh and concrete substrate. An experimental program of single pull-out shear tests for the PBO-FRCM system is designed and conducted to verify the above two purposes. The results of this study can be used to estimate the effective bond length of PBO mesh in PBO-FRCM systems and also investigate if the debonding phenomenon occurs in the cementitious matrix or at the fiber and matrix interface. The comparison between the PBO-FRCM system and the ordinary FRP system is also discussed.

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Section: Introductionmentioning

confidence: 99%

Investigation of The Bond Behaviour Between PBO-FRCM Strengthening Material and Concrete

Tran

Stitmannaithum

Ueda

2014

ACT

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“…D'Ambrisi et al (2013) concluded that the bond performances of FRCM materials depend on the fibers/matrix coupling; therefore, different types of fibers and mortars will have totally different behavior with the same concrete substrate [13]. According to D'Ambrisi et al (2011), the typical observed failure modes of FRCM-strengthened concrete beams under flexural loads were the slippage of the fabric within the matrix, delamination of the FRCM at the fiber/matrix interface and detachment of the FRCM from the concrete substrate, as shown in Figure 5 [4].…”

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confidence: 99%

Effect of the Fiber Type and Axial Stiffness of FRCM on the Flexural Strengthening of RC Beams

Jabr

El-Ragaby

Ghrib

2017

Fibers

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Abstract:The use of externally-bonded fiber-reinforced polymer (FRP) sheets has been successfully used in the repair and strengthening of both the shear and flexural capacities of reinforced concrete (RC) beams, slabs and columns since the 1990s. However, the externally-bonded FRP reinforcements still present many disadvantages, such as poor performance in elevated temperature and fire, lack of permeability and strength degradation when exposed to ultraviolet radiation. To remedy such drawbacks, the fiber-/fabric-reinforced cementitious matrix (FRCM) has been recently introduced. The FRCM system consists of a fiber mesh or grid embedded in a cementitious bonding material. The present research investigates the flexural strengthening of reinforced concrete (RC) beams with FRCM. The experimental testing included eight large-scale concrete beams, 150 mm × 250 mm × 2400 mm, internally reinforced with steel bars and strengthened in flexure with FRCM. The investigated parameters were the internal steel reinforcement ratio and the FRCM systems. Two steel reinforcement ratios of 0.18 and 0.36 of the balanced reinforcement ratio, as well as three FRCM systems using glass, carbon and PBO fibers were investigated. Test results are presented in terms of load-deflection, load-strain and load-crack width relationships. The test results indicated that the PBO FRCM significantly increased the ultimate capacity of the strengthened RC beams with both low and moderate internal reinforcement ratios compared to the glass and carbon FRCM.

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“…Jung et al [16] proposed the FRCM bond strength model with regard to both the slippage and the debonding phenomenon of the FRCM composite by (5), based on the FRCM research performed by D'Ambrishi et al [18] and the model proposed by Teng et al [28]. e effective tensile stress level in the FRCM fabric at failure can be computed by the following equations: …”

Section: Jung Modelmentioning

confidence: 99%

“…PBO fabric, CFRP fabric, and GFRP fabric were used as reinforcing materials in most studies regarding the FRCM composites [17,18]. However, due to decomposition of epoxy matrix, the tensile strength of CFRP and GFRP at 600°C decreased to less than 60% of the strength measured at room temperature, and the tensile strength of PBO fabric at 500°C decreased to less than 40% of the strength measured at room temperature [17,19].…”

Section: Introductionmentioning

confidence: 99%

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

Lee

Hong

Yeon

et al. 2018

Advances in Materials Science and Engineering

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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.

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Experimental analysis on bond between PBO-FRCM strengthening materials and concrete

Cited by 247 publications

References 19 publications

Investigation of The Bond Behaviour Between PBO-FRCM Strengthening Material and Concrete

Investigation of The Bond Behaviour Between PBO-FRCM Strengthening Material and Concrete

Effect of the Fiber Type and Axial Stiffness of FRCM on the Flexural Strengthening of RC Beams

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

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