Steel Fiber Reinforced Concrete Research Articles

Experimental Study on Steel Fibre Reinforced Rubberised GGBS Based Geopolymer Concrete

Geopolymer concrete is a sustainable material which can reuse industrial by-products and thereby minimize the emission of greenhouse gases during its production, unlike cement. This geopolymer concrete is found to develop high strength within a short period of ambient curing. It is observed that the addition of steel fibers enhances the strength and durability characteristics of this concrete. The paper highlights the engineering and durability properties of steel fiber-reinforced GGBS-dolomite geopolymer concrete and explains how the bond strength and impact resistance of GGBS-dolomite geopolymer concrete is improved by the inclusion of steel fibers.

Retrofitting of post-heated R.C. columns using steel fiber reinforced self-compacting concrete jackets

This work aims to examine the effectiveness of using steel fiber-reinforced self-compacting concrete (SFRSCC) jackets in retrofitting RC columns subjected to high temperatures. In order to do that, eleven RC columns were cast and tested under axial loading. One column served as an unheated control column, and ten columns were heated to 400 °C and 600 °C for two hours. Subsequently, eight columns were retrofitted using SFRSCC jackets. The volume fraction of steel fibers and the thickness of the SFRSCC jackets were the main parameters considered for the retrofitting technique. According to the experimental findings, SFRSCC jackets can significantly enhance the structural performance of post-heated columns as evaluated by failure load, stiffness, and toughness. The percentage increase in the failure load, stiffness, and toughness of retrofitted post-heated columns is greatly impacted by the thickness of the SFRSCC jackets. The retrofitted columns with 25 mm and 50 mm SFRSCC jackets increased their failure load by 63.9% and 211.8%, respectively, relative to that of the heated control column at 600 °C. It is obvious that the failure load of the retrofitted columns was not significantly impacted by increasing the volume fraction of steel fiber in the SFRSCC jackets. Finally, a proposed design equation was suggested to predict the failure load of retrofitted post-heated columns with SFRSCC jackets.

Research into Preparation and Performance of Fast-Hardening RPC Mixed with Straw.

Based on its characteristics of early strength, good toughness, and excellent mechanical and impact resistance, steel fiber-reinforced fast-hardening reactive powder concrete (RPC) is expected to become an alternative material used in the rapid repair of marine concrete structures. However, the steel fibers have also caused corrosion problems in coastal environments. To make doped fiber fast-hardening RPC more adaptable for use in ocean engineering, this study prepares fast-hardening RPC mixed with straw and studied the effects of straw content and curing age on its slump flow, setting time, and mechanical performance (flexural strength, compressive strength, and flexural toughness). The effects of straw addition on the compactness and hydration products of fast-hardening RPC were studied through macro- (ultrasonic analysis) and micro-scopic analysis (electron microscopy scanning and X-ray diffraction patterns). The straw content mentioned in this paper refers to the percentage of straw in relation to RPC volume. The results showed that straw reduced the fluidity of RPC slurry by 10.5-11.5% compared to concrete without straw, and it accelerated the initial setting of RPC slurry. When the straw content accounted for 1% of RPC volume, the setting rate was the fastest, with a increasing rate being 6-18%. Compared to concrete without straw, the flexural and compressive strength of fast-hardening RPC was enhanced by 3.7-30.5%. When the content was either 3% or 4%, the mechanical properties improved. Moreover, when the straw content accounted for 4% of RPC volume, the flexural toughness was the highest, with the increase rate being 21.4% compared to concrete without straw. Straw reduces the compactness of fast-hardening RPC.

Experimental Investigation on Fatigue Improvement of Orthotropic Steel Bridge Deck Using Steel Fiber Reinforced Concrete

AbstractThe high-performance topping concrete overlay would significantly reduce the fatigue stresses at susceptible details of orthotropic steel deck (OSD) and effectively improve the fatigue performance. Full-scale fatigue tests and numerical simulations were carried out to quantify the effects of steel fiber reinforced concrete (SFRC) topping pavement in reducing the OSD fatigue stresses based on a practical bridge design. Fatigue stress of the OSD critical details was measured from tests and cracking was observed in the SFRC overlay. Both an innovative pre-pump-pulse Brillouin optical time domain analysis (PPP-BOTDA) distributed optical fiber sensor and strain gauges were also used to measure the stress at OSD fatigue-prone details, including the crossbeam cut-out, rib-to-deck weld, rib-to-crossbeam weld and splice of U-rib. The corresponding three-dimensional (3-D) finite element model was then established and verified by the test results, and used to conduct a parametric study to obtain a quantitative expression of fatigue stress reduction factor, in terms of relative elastic modulus and thickness of overlay and steel deck plate. The proposed quantitative model of the fatigue stress reduction effect can guide the cost-effective design of composite bridge deck.

Serviceability evaluation model of SFRC beams reinforced with FRP bars based on deformation control

This research investigated the flexural behavior of steel fiber-reinforced concrete (SFRC) beams reinforced with fiber-reinforced polymer (FRP) bars to promote its application in engineering. Ten beams with widths of 150 mm, heights of 250 mm and lengths of 1800 mm were tested under four-point bending. The experimental parameters included the reinforcement type, steel fiber volume fraction, concrete strength, and longitudinal reinforcement ratio of the FRP bars. Based on the test results, a prediction model was proposed for the balanced reinforcement ratio (ρfb), considering the influence of steel fibers. Deformation prediction equations in the current design codes in the US, China, and Canada were compared based on the experimental results. The increase in the reinforcement ratio (ρf) can improve both the service moment (Ms) and the ultimate moment (Mu). With an increase in ρf/ρfb, the Ms/Mu value decreased for under-reinforcement beams but increased for over-reinforcement beams. Based on the linear regression theory, a new calculation model for the flexural moment utilization efficiency of SFRC beams reinforced with FRP bars in serviceability limit states is established. The ductility indices of all beams are above the minimum limit of 4, as proposed by CSA S6-14.

A hybrid neuro-swarm model for shear strength of steel fiber reinforced concrete deep beams

Despite the wide application of steel fiber to augment the strength and durability of concrete, predicting the shear strength capacity of steel fiber-reinforced concrete in deep beams has been a challenge for civil engineering applications. This is due to the complex interactions of various parameters such as the beam dimensions, material strength, and reinforcements. To address this concern, a hybrid Neuro-Swarm model was developed using 116 experimental datasets. With the least root mean squared error (RMSE) of 10.02 and the highest correlation coefficient (R) of 0.997, the proposed model demonstrated remarkable performance indicators exhibiting superior prediction performance. The Analysis of Variance (ANOVA) test revealed no significant difference between predicted and experimental shear strength values. Furthermore, with relative importance values of 13.573% and 13.565%, the beam depth and yield strength of the reinforcing bars were found to be the most significant predictors influencing the shear strength. When compared to previously established shear strength prediction models in the literature, the proposed model emerged as the best and most robust. The results demonstrated that the new hybrid Neuro-Swarm model may be used to accurately forecast the shear strength of steel fiber reinforced concrete deep beams.

On the application of neural networks for service life prediction of steel fibre-reinforced concrete

While physics-based modelling entails the capability to describe the mechanisms and physics of a system across multiple scales, these models often are decoupled from external measurements available for specific systems of interest. On the other hand, data analysis methods allow the decoding of information on particular systems, yet such mathematical analyses struggle with context of the domain physics under study. Although it is common to have both methods positioned as antagonizing, the real challenge is to combine them, capitalizing on their strength and information. Proper integration between physics-based models and data-driven inference will enable understanding, optimising, and predicting complex physical systems around us. This study exemplifies the application of machine learning to predict corrosion in fibre-reinforced concrete. Focus is placed on current limitations concerning the application of machine learning to predict the underlying mechanisms for fibre corrosion and opportunities to integrate physics-based modelling and data-driven interference truly. Results indicate that it is possible to train neural networks with high accuracy through training examples (>99% classification accuracy), while a loss in the ability to generalize patterns and thus predict the degree of fibre corrosion is observed for samples beyond the training set (<60% classification accuracy). The absence of the ability to generalize is mainly caused by the loss of physics, such as material history dependency, physical invariance, and conservation laws, which are not naturally resolved in the current machine learning models.

Cracking Pattern and Bearing Capacity of Steel Fiber-Reinforced Concrete Single-Layer Tunnel Lining

In recent years, steel fiber-reinforced concrete (SFRC) single-layer linings have been used in tunnel engineering. Compared to plain concrete single-layer linings, SFRC single-layer linings demonstrate enhanced bearing capacity, durability, and sustainability. Existing studies primarily focused on the mechanical properties of SFRC; however, limited investigations have been conducted on the cracking pattern of SFRC linings. This study uses laboratory tests to examine the influence of steel fiber content and aspect ratio on the mechanical properties of concrete, such as compressive strength and elastic modulus. After the recommended content and aspect ratio of steel fiber are proposed through tests, the cracking pattern and safety performance of plain concrete and SFRC linings under surrounding rock pressure are studied using a similar model test. The test results indicate that the recommended steel fiber volume fraction and aspect ratio for CF35 SFRC are 0.58% and 70, respectively. Due to the effect of loose load, cracks initially develop on the inside of arch crowns in both plain concrete and SFRC single-layer linings. Subsequently, new cracks appear on the inside of the lining floor and the outside of the two wall feet. Numerous narrow cracks with rugged and winding expansion paths can be found on SFRC single-layer linings. Conversely, plain concrete single-layer linings exhibit fewer cracks with larger widths along a straighter path. The initial cracking load of a single-layer lining made of plain concrete is 0.027 MPa, whereas for a single-layer lining made of SFRC, it is 0.04 MPa. This indicates that SFRC can effectively enhance the initial cracking load of lining structures. In the event of damage to the lining, the most critical area for the plain concrete single-layer lining is at the two wall feet, where the minimum safety factor is 1.66. However, for the SFRC lining in the same location, the safety factor is 2.7, resulting in a 62.7% increase in safety.

Steel Fiber-Reinforced Rubberized Concrete for Roadways in Cold Regions: Public Road Test

This research documents the real-world performance of a new pavement product for use in cold regions—steel fiber-reinforced rubberized concrete (SFRRC). During the previous phase of this research, SFRRC underwent laboratory testing as proof of concept. During the current phase, precast slabs of SFRRC was installed on a public road, Abbott Road, in the Municipality of Anchorage, Alaska and monitored in the field using visual inspection, a continuous collection of strain gauge data, deflection measurements, rut depth, skid resistance, and other measures. The current location of the SFRRC is considered a high-traffic urban arterial, which makes it an effective location to study rutting, freeze-thaw resistance, falling weight deflection, skid resistance, and life-cycle cost. A comparative analysis was conducted using the same measuring techniques on hot mix asphalt (HMA) on an adjacent road section built at the same time. The results show that the SFRRC road sections have significantly better rutting resistance compared to the adjacent HMA road section, and the results of the freeze-thaw resistance and deflection field testing validate the results of the laboratory testing performed as part of an earlier phase. Furthermore, comparative life-cycle cost analyses of SFRRC and HMA justifies the use of SFRRC in roadway construction in cold regions in terms of cost effectiveness, enhanced performance, and extended life. The outcome of this research recommends the use of SFRRC for highway intersections and/or test sections on major arterials as the next phase of introducing this material for roadway construction in cold regions.

Residual flexural tensile strength properties of notched concrete beams with high-strength steel fibers

The purpose of this study is to replace the steel bars and barbed wires in reinforced concrete structures, conduct experiments using steel fiber-reinforced concrete (SFRC), and investigate its failure modes. We conduct the experiments by performing the three-point bending test specified in the EN 14651 standard. Based on an analysis of the results obtained worldwide in recent years, we use SFRC specimens fabricated in the structural laboratory of Chungnam University in South Korea and apply the results from other researchers. The residual stresses of 625 SFRC specimens are analyzed based on the high or low strengths of the fibers and categorized according to fiber content and the aspect ratio of the fibers. The contribution of each condition to the residual flexural strength is discussed based on the results of the residual flexural strength after cracking, and it is suggested that more research and calculations are needed for high-strength steel fibers.

Microcrack monitoring and fracture evolution of polyolefin and steel fibre concrete beams using integrated acoustic emission and digital image correlation techniques

The use of polymer and steel fibres in plain concrete appears to be an excellent solution for limiting crack propagation and improving the post-ductility performance of concrete structures. Based on this premise, this study investigated the fracture evolution of polyolefin fibre-reinforced concrete (PFRC) and steel fibre-reinforced concrete (SFRC) specimens through the integrated application of two diagnostic techniques, acoustic emission (AE) and digital image correlation (DIC), under three-point bending tests. Based on the processing of AE signals, different AE statistical parameters such as the cumulative number of hits, amplitude distribution, and some representative analysis methods including the b-value method, Ib-value method, and AE intensity analysis methods were selected to analyse the early detection of cracking and post-cracking behaviour in PFRC vs SFRC specimens during mechanical degradation. Simultaneously, the DIC technique was used to validate the fracture evolution of the AE results. Furthermore, to verify the reliability of the AE and DIC results, the damage localisation and fracture evolution of the PFRC versus SFRC specimens were confirmed by integrating the AE fracture energies and DIC outcomes. The tests and analysed results showed that the addition of steel fibres to plain concrete significantly improved the ability to restrict crack propagation and provided higher post-cracking resistance compared to PFRC specimens owing to their stronger fibre–matrix bonding, effective fibre bridging, and crack-arresting mechanism. The present study indicates that the combined AE and DIC techniques are highly effective for the early detection of damage and ductility performance in fibre-reinforced concrete structures.

A model to predict the rear face damage caused by non‐deforming projectile impact on plain and steel fiber reinforced concrete barriers

AbstractThis paper presents a model for evaluation of the rear face damage in concrete barriers subjected to impact of non‐deforming projectiles. This is an improved and extended version of a previously published model, which now covers both plain and steel fiber reinforced concrete (SFRC) barriers. The rear face damaged area commonly measured in tests is characterized by an equivalent diameter, evaluated by the model. Calibration and then validation are based on published experimental data. Different sets of experiments, of plain concrete and SFRC, reported by different researchers, were used for the model's calibration and for its validation. The calibrated model's predictions show reasonable agreement with the reported experimental results, especially in view of their considerable scatter. The main findings from a parametric study of the model's predictions refer to the influence on the rear face damage (at barrier thickness lower than the scabbing limit thickness) of including steel fibers in the concrete mix, the barrier thickness, impact level, and the projectile diameter. The model's predictions demonstrate the lower extent of damage in SFRC barriers, compared to plain concrete. The use of the model enables quantitative assessment of this damage and of its reduction in SFRC barriers.

The effect of recycled-tire steel fiber and engineered steel fiber on rebar corrosion and shear behavior of corroded RC beam

The implementation of steel-fiber reinforced concrete (SFRC) can improve the durability of reinforced concrete structures exposed to corrosive environments. More recently, the recycled-tire steel fibers (RTSF) impressively boosted mechanical performance and post-cracking strength of plain concrete. Unlike the engineered steel fiber (ESF), RTSF is capable of arresting both micro- and macro-cracks. Micro-crack arresting via RTSF incorporation can reduce chloride penetration in SFRC. In this study, first, the influence of low dosage of RTSF and/or ESF on mechanical properties of concrete is explored. Second, the effect of RTSF, ESF and their hybrid utilization on the corrosion development on embedded steel rebars is surveyed. Artificial corrosion procedure was implemented for inducing corrosion in rebars embedded in reinforced concrete (RC) beam. Finally, the flexural performance of corroded SFRC beam with different corrosion rates (0%, 2%, 5%, 7%, and 10%) were evaluated upon a three-point bending test setup. According to the results, the compressive strength of plain concrete improved 37% by 40 kg/m3 RTSF incorporation. Moreover, the tensile and post-cracking strengths of concrete enhanced significantly by hybrid utilization of RTSF and ESF. The residual strength of SFRC mix at both service and ultimate load was improved by the hybrid utilization of both RTSF and ESF by 25-120%. For uncorroded RC beams containing SFRC mix, the RTSF incorporation improved the shear capacity of the plain RC beam by 25%. Among different types of fibers, RTSF was more effective in decreasing the actual corrosion rate of rebars embedded in RC beams. Additionally, corrosion of embedded rebars up to 8% slightly reduced the rotation capacity of FRC beams.

Compressive Strength Dependency on the Effect of Temperature Variation on the Percentages of Steel Fiber in Concrete

Aims: The aim of this study is to check the effectiveness of steel fiber on the compressive strength of concrete. Background: Fibers have long been used as building materials to improve the ductility, tensile, compressive, and flexural strengths of concrete. Although fibers have been known as an effective reinforcement material for concrete structures, it is also acknowledged to be a suitable alternative to reinforcement steel bars. Objective: The objective of this research is to investigate some engineering properties, the compressive behavior of steel fiber reinforced concrete (SFRC), and the effect of elevated temperatures of up to 1000°C on concrete. Methods: Various tests which included the slump test, compressive strength test, as well as heating tests were done. The workability (slump) and thermal effects of M20 SFRC were evaluated. Results: Based on the results obtained, it could be observed that the workability of the M20 concrete reduced with the increase in steel fiber (SF) content from 0% to 1.6% as values obtained were 80mm, 73mm, 67mm, 61mm and 55mm for SF contents of 0%, 0.4%, 0.8%, 1.2%, and 1.6% respectively. These values showed medium workability of the concrete according to ASTM C-143/C-143 M-03. Also, the addition of SF to plain M20 concrete greatly improved the compressive strength (ƒc) with the concrete strength at 26.89N/mm2, 30.41N/mm2, 32.85N/mm2, 35.90N/mm2 and 39.66N/mm2 after 28 days of curing for steel fiber contents of 0%, 0.4%, 0.8%, 1.2%, and 1.6% respectively. The f_c after heating the concrete mix to 1,000°C showed improved thermal resistance with 4.2N/mm2, 8.23N/mm2, 11.63N/mm2, 15.60N/mm2 and 17.20N/mm2 for SF contents of 0%, 0.4%, 0.8%, 1.2% and 1.6% respectively. Conclusion: The incorporation of steel fibers in the concrete mix decreased the workability of SFRC but increased its compressive strength and balling tendencies.

The performance enhancement of containment with fiber reinforcement following a LOCA considering different ambient conditions

The prestressed concrete containment vessels (PCCVs) will be exposed to the temperature action followed by the internal pressure increasing after a loss of coolant accident (LOCA) with safety system failure. The damage evolution of the PCCV under the effect of thermal-pressure coupling deserves in-depth study. Moreover, different containment external temperatures are seldom considered in previous studies whereas they may further pose a great challenge for the design and safety of containments. Just as important, an attempt is first made in this paper to involve steel fiber in the construction of the containment to observe the performance of the containment with steel fiber strengthening under the effect of thermal-pressure coupling. Therefore, the influence of the possible outside temperature (i.e. −30 °C, −15 °C, 0 °C, 15 °C, and 30 °C) determined from the 5 existing or planned nuclear power plant sites in China on the distribution of temperature field of containment is researched firstly. Then, the damage indices corresponding to the containment are defined to represent the actual damage performance and failure mechanism of the structure. Finally, the comparative damage performance and failure mechanism between conventional and steel fiber reinforced concrete (SFRC) containments taking into account the effect of coupling temperature and internal pressure is detailedly discussed. The results show that the SFRC is more expeditious in restraining radial and vertical displacement of containment under lower external temperatures for subsequent internal pressure. Under the ultimate internal pressure, the SFRC containment has a reduction rate of 5.37% for radial displacement and 35.52% for vertical displacement at an external temperature of −30 °C, while 2.23% and 15.33% at an external temperature of 30 °C, respectively. Furthermore, SFRC containment has better performance under the effect of coupling of temperature and internal pressure compared to conventional containment. For example, at an internal pressure of 1.2 MPa, the damage reduction rate for concrete is 94.18% at an external temperature of −30 °C and 81.37% at 30 °C; for the steel liner, the damage reduction rate is 50.22% at an external temperature of −30 °C and 87.83% at 30 °C. For the containment prestressing tendons, the damage reduction rate is around 60% under ultimate internal pressure. The study can provide important guidance for siting and design of nuclear containments and alternative retrofitting measures for nuclear containments.

High strength steel fiber reinforced concrete for fortification protected structures

The article presents the results of research on modified steel fiber-reinforced concrete and shows the expediency of their use to increase the effectiveness of fortification protection structures against shock loads. It was established that according to the results of tests of compressive strength (fсm = 79.4 MPa) and tensile strength during bending (fс, lf = 7.4 MPa), steel fiber-reinforced concrete can be classified as high-strength (strength class C 50/60) and rapid-hardening (fcm2/ fcm28 = 0.57) in accordance with DSTU EN 206:2018. Manufacturing in factory conditions of reinforced concrete elements of structures based on high-strength steel fiber-reinforced concrete with increased resistance to various types of force effects during shelling will allow to obtain quick-assembling/quick-dismantling fortification structures that will be able to provide protection for the personnel of the units of the armed forces of Ukraine.

Seismic Performance of SFRC Shear Walls with Window Opening and the Substitution Effect for Steel Bars

Shear walls are important vertical and lateral bearing element in structures. While shear walls with openings are fragile due to stress concentration and the quasi-brittle behavior of concrete in tension. Therefore, additional strengthening rebars are required for the shear walls with openings. However, it aggravates the problem of dense reinforcement which increases the steel cage manufacturing and concrete compaction problem and still lacks countermeasures against concrete damage and cracking. To reduce the rebar demand and improve the damage tolerance of squat reinforced concrete (RC) shear walls with openings, an optimized steel-fiber-reinforced concrete (SFRC) was adopted to understand the seismic performance by cyclical loading test. The tested specimens included a plain RC shear wall without strengthening bar around the opening (for comparison), an SFRC shear wall, and an SFRC shear wall with a reduced distributed steel bar. This paper mainly studies the effect of using SFRC to improve the seismic performance of the open shear wall and to replace the reinforcement around the opening and the shear reinforcement. The hysteresis curves, skeleton curves, stiffness degradation, bearing capacity degradation and energy dissipation of the specimens were analyzed. The results show that the failure can be delayed and relieved, the deformation capacity and energy dissipation can considerably improve, and rebars can be partially replaced by using SFRC.

Correlation between shear stress and strain measured on steel fiber reinforced concrete panels and walls

Previous studies have reported that steel fibers increase concrete shear strength and energy dissipation capacity. Existing strength prediction models focus on Steel Fiber Reinforced Concrete (SFRC) beams since code requirements already allow steel fibers to increase shear strength in these structural elements. However, the advantages of the SFRC have stimulated the investigation of its use in concrete walls subjected to shear demands. Unfortunately, the shear behavior assessment in SFRC walls requires significant investment that is not accessible for all research studies. Diagonal tension tests on SFRC panels could result in a more economical and viable option. Still, the shear response of RC panels differs from that of walls because of the test setup and the loading protocol. This study aims to correlate the maximum shear stresses and displacements measured in SFRC walls and SFRC panels from a database that includes 20 diagonal tension tests on panels and 33 quasi-static cyclic tests on walls. The 20 panels tests include three monotonic and 17 quasi-static cyclic tests from two previous studies. The other 33 wall tests include six dynamic shake table tests and 27 cyclic quasi-static tests from 9 previous studies. The current study showed that the maximum shear stresses in SFRC panels are approximately 2.3 times greater than those in SFRC walls. Additionally, the displacements associated with the maximum shear stresses in SFRC panels were about six times less than those registered in SFRC walls. The differences are mainly because the walls are affected by flexural, shear sliding, and web shear stresses, and the panels are predominantly affected by shear forces. As a result, two correlation models for stresses and displacements of SFRC walls are proposed as an effective tool for research with limited resources to implement cyclic tests on SFRC walls. The study also proposed stiffness degradation values associated with limit states and performance levels in SFRC walls for low-rise housing.

Structural behaviour of steel fibre-reinforced concrete floor system for modular construction

Steel fibre-reinforced concrete (SFRC) slabs are ideal for modular construction owing to the shorter span of slab in standardised modules. To investigate the structural behaviours of SFRC floor system designed for modular construction, nine full-scale slab specimens were tested both at ambient temperature and under fire conditions. The crack pattern, failure mode, concrete spalling phenomenon, deformation capacity, load-carrying capacity and fire resistance time of the SFRC slabs are reported and compared with those of conventional steel rebar-reinforced concrete slabs. The experimental results showed that SFRC slabs achieved sufficient load carrying-capacity and fire resistance time for the application in modular buildings. A fibre-element model is proposed for computing the temperature distribution and cross-sectional moment resistance of SFRC slabs under fire conditions. Based on the experimental findings, design recommendations are provided to determine the fire resistance of SFRC floor system in modular construction.

Performance of steel fiber reinforced concrete mixed with chloride solution and exposed to high humidity environment

In order to investigate the performance of steel fiber reinforced concrete (SFRC) suffered from chloride attack, the SFRC specimens were prepared using 9 wt% NaCl solution to accelerate the corrosion, and they were also exposed to the high humidity environment (≥90 % RH); meanwhile, the carbonation was also considered. The performance evolution of SFRC suffered from 14 months of in-situ chloride attack was monitored, including compressive strength, flexural property, splitting-tensile property, and so on. The results show that the SFRC specimens showed no deterioration in the mechanical properties after 14 months of chloride attack, while only some corrosion spots were found on the concrete surface, independently of the water to binder ratios and mineral admixtures. The carbonation accelerated the chloride-induced corrosion of steel fibers in the carbonated zone of concrete, but did not result in the reduction in the mechanical properties of SFRC within 14 months of chloride attack.