Fabric-reinforced cementitious matrix behavior at high-temperature: Experimental and numerical results

Donnini, Jacopo; Basalo, Francisco De Caso y; Corinaldesi, Valeria; Lancioni, Giovanni; Nanni, Antonio

doi:10.1016/j.compositesb.2016.10.004

Cited by 119 publications

(64 citation statements)

References 34 publications

(47 reference statements)

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“…In studies [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28], the structural capacity of TRC alone (not on a different substrate) under elevated or high temperature has been investigated. However, in [12][13][14][15][16][17][18][19][20][21], the maximum temperature that was tested was 650 • C, and only in publications [22][23][24][25][26][27][28], TRC was investigated under temperatures of 700 • C-1000 • C, which corresponds to the realistic temperatures developed in case of a cellulosic fire [29]. Moreover, out of the last group of publications, only in [26,28] tests have been performed on TRC specimens according to the standard fire curve proposed by EN1363 ( [29]), while using glass or carbon fiber reinforcement, which are the most commonly used in structural applications.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Behavior of Textile Reinforced Cementitious Composites Subjected to Fire

et al. 2019

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The mechanical behavior of textile reinforced cementitious composites (TRC) has been a topic of wide investigation during the past 30 years. However, most of the investigation is focused on the behavior under ambient temperatures, while only a few studies about the behavior under high temperatures have been conducted thus far. This paper focused on the thermomechanical behavior of TRC after exposure to fire and the residual capacity was examined. The parameters that were considered were the fiber material, the thickness of the concrete cover, the moisture content and the temperature of exposure. The specimens were exposed to fire only from one side and the residual strength was measured by means of flexural capacity. The results showed that the critical factor that affects the residual strength was the coating of the textiles and the law of the coating mass loss with respect to temperature. The effect of the other parameters was not quantified. The degradation of the compressive strength of TRC was quantified with respect to temperature. It was also concluded that a highly asymmetrical design scheme might lead to premature failure.

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Section: Introductionmentioning

confidence: 99%

Thermomechanical Behavior of Textile Reinforced Cementitious Composites Subjected to Fire

et al. 2019

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“…FRCM; on the other hand, is relatively low‐cost, easy‐to‐apply for nonskilled workers, and more applicable in case of wet surfaces or low temperatures . Also, the high thermal capacity of the FRCM mortar provides higher resistance to heat/fire compared to the epoxy resin of FRP systems . In addition, FRCM can accommodate recycled materials resulting in a more advantageous product from a sustainability perspective .…”

Section: Introductionmentioning

confidence: 99%

Tensile characterization of multi‐ply fabric‐reinforced cementitious matrix strengthening systems

Younis

Ebead

Shrestha

2019

Structural Concrete

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Fabric reinforced cementitious matrix (FRCM) is a composite consisted of highstrength fibers impregnated in a cement-based mortar, and is commonly used for strengthening reinforced concrete and masonry structures. Comprehending the tensile behavior of FRCM is important to achieve a reliable and accurate design of FRCM strengthening systems. The current paper reports on the results of an experimental study on the tensile characterization of FRCM. A total of 40 FRCM specimens (410 × 50 mm, varied in thickness) were prepared and tested. The tensile characterization tests were conducted according to AC 434 guidelines using clevisgrip mechanism. The tests were used to assess the effect of two parameters:(a) fabric type (carbon/glass) and (b) number of fabric plies (one/two/three/four).The results showed that the tensile strength of carbon-FRCM specimens was approximately 1.33 times that of the glass-FRCM counterparts. Three distinct failure modes were observed, namely, (a) ductile fabric slippage in carbon-FRCM (up to three plies of fabric); (b) brittle fabric delamination in carbon-FRCM with four plies of fabric;and (c) brittle fabric rupture in glass-FRCM systems. The FRCM tensile loadcarrying capacity had proportionally increased with the number of fabric plies; less significant effect (within 20%) was observed on the corresponding ultimate tensile stresses (considering the net fabric area as the effective area). K E Y W O R D Scomposite, fabric-reinforced cementitious matrix, mechanical characterization, strengthening, textile reinforced concrete, textile reinforced mortar

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“…The residual shear bond load decreased by up to 50% and 90% in the case of PBO-TRM and 'heavy' basalt-TRM, respectively, while it remained almost unaffected in the case of the 'light' basalt-TRM ('light' having half the aerial weight of 'heavy'). Furthermore, a numerical model for the simulation of TRMs' bond behavior under different temperatures was proposed by Donnini et al [9]. For the calibration of the model, double-lap/single-prism shear bond tests were conducted (prisms, in this case, standing for single bricks).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Elevated Temperatures on the TRM-to-Masonry Bond: Comparison of Normal Weight and Lightweight Matrices

2019

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Textile Reinforced Mortar (TRM) is a composite material that has already been successfully used as an externally bonded strengthening means of existing structures. The bond of TRM with various substrates is of crucial importance for determining the degree of exploitation of the textile. However, little is known on the effect of elevated/high temperatures on the TRM-to-substrate bond characteristics while relevant testing protocols are also lacking. This study focuses on the experimental assessment of the TRM-to-masonry bond after exposure of masonry wallettes unilaterally furnished with TRM strips at 120 °C and 200 °C for 1 h. The shear bond tests on cooled-down specimens were carried out using the single-lap/single-prism set-up. Two TRM systems were investigated sharing the same type of textile, which is a dry AR glass fiber one (either in a single-layer or in a double-layer configuration) and different matrices: one normal weight (TRNM) and another lightweight (TRLM) of equal compressive strengths. At control conditions (non-heated specimens) and after exposure at a nominal air temperature of 120 °C, both single-layer TRM systems exhibited similar bond capacities. After exposure at a nominal air temperature of 200 °C single-layer and double-layer TRNM overlays outperformed their TRLM counterparts. A critical discussion is based on phenomenological evidence and measured response values.

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Fabric-reinforced cementitious matrix behavior at high-temperature: Experimental and numerical results

Cited by 119 publications

References 34 publications

Thermomechanical Behavior of Textile Reinforced Cementitious Composites Subjected to Fire

Thermomechanical Behavior of Textile Reinforced Cementitious Composites Subjected to Fire

Tensile characterization of multi‐ply fabric‐reinforced cementitious matrix strengthening systems

The Effect of Elevated Temperatures on the TRM-to-Masonry Bond: Comparison of Normal Weight and Lightweight Matrices

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