Corrosion-Effected Bond Behavior between PVA-Fiber-Reinforced Concrete and Steel Rebar under Chloride Environment

Zhang, Xuhui; Wu, Xun; Wang, Yan

doi:10.3390/ma16072666

Cited by 9 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Usually, cracking of the concrete cover is considered to indicate the end of the service life of concrete structures affected by steel reinforcement corrosion [ 17 ]. Since classical methods of examining the development of corrosion processes are time consuming [ 18 , 19 ], various methods of accelerating the corrosion process are used [ 3 , 20 , 21 , 22 , 23 ]. These methods usually use an external electrical field and high corrosion rate values (typically 100 μA/cm 2 or higher).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Corrosion Processes on the Degradation of Concrete Cover

Szweda,

Skórkowski,

Konečný

2024

Materials

View full text Add to dashboard Cite

In this work, two methods were used to accelerate the corrosion of concrete. In the first method, chloride ions were injected into the concrete using the migration method. The moment of the initiation of the corrosion process was monitored using an electrochemical method of measuring polarization resistance. In the next step, the corrosion process was accelerated by the electrolysis process. Changes on the sample surface were also monitored using a camera. In the second method, the corrosion process of the reinforcing bar was initiated by the use of the electrolysis process only. Here, changes occurring on the surfaces of the tested sample were recorded using two web cameras placed on planes perpendicular to each other. Continuous measurement of the current flowing through the system was carried out in both cases. It was assumed that in conditions of natural corrosion, a crack would occur when the sum of the mass loss of the reinforcing bar due to corrosion reached the same value in tcr(real) (real time) as it reached in the tcr (time of cracking) during the accelerated corrosion test. The real time value was estimated for C1 concrete with cement CEM I. The estimated value was tcr(real) = 1.1 years and for C2 concrete with cement CEM III, tcr(real) = 11.2 years. However, the main difference that was observed during the tests was the nature of the concrete cracks. In the case of the C1 concrete sample, these occurred along the reinforcing bar, while in the C2 concrete, the failures occurred on a perpendicular plane transverse to the direction of the reinforcing bar.

show abstract

Section: Introductionmentioning

confidence: 99%

The Influence of Corrosion Processes on the Degradation of Concrete Cover

Szweda,

Skórkowski,

Konečný

2024

Materials

View full text Add to dashboard Cite

show abstract

“…In the process of continuous research, scholars have carried out a large number of studies on the addition of steel fibers [ 17 ], basalt fibers [ 18 ], and polypropylene fibers [ 8 ] to concrete, especially the development of concrete properties under different environmental conditions, which has become a popular research topic [ 19 ]. It is noteworthy that polyvinyl alcohol (PVA) fibers, which have high strength, modulus of elasticity, abrasion resistance, acid and alkali resistance, and do not react with hydration products, are receiving more and more attention nowadays [ 20 ]. The composite addition of NS and PVA fibers into concrete using the denser matrix achieved by NS can increase the encapsulation force on the fibers so that they can provide stronger bridging to enhance the durability and mechanical properties of concrete, and this is gradually becoming a popular research topic.…”

Section: Introductionmentioning

confidence: 99%

Durability and Mechanical Properties of Nano-SiO2 and Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites Subjected to Saline Freeze–Thaw Cycles

Wan,

Zhao,

et al. 2024

Materials

View full text Add to dashboard Cite

To investigate the effects of nano-SiO2 (NS) and polyvinyl alcohol (PVA) fibers on the durability and mechanical properties of cementitious composites subjected to saline freeze–thaw cycling, a series of PVA fiber-reinforced cementitious composite (PFRCC) specimens were prepared using various fiber contents, and a series of NS and PVA fiber-reinforced cementitious composite (NPFRCC) specimens were prepared using various combinations of NS and fiber contents. Durability and fracture toughness tests were subsequently conducted on the specimens after different numbers of saline freeze–thaw cycles. The results indicate that the degradation of material properties can be divided into slow and accelerated damage stages before/after 50 freeze–thaw cycles. The durability and fracture toughness of the specimen series tended to increase, then decrease with increasing NS and PVA contents, suggesting optimum levels. When the PVA fiber content was 0.5%, PFRCC specimens had the best durability after saline freeze–thaw cycles; when the NS and PVA fiber contents were 1.0% and 0.5%, respectively, NPFRCC specimens had the best durability and fracture properties, and the initiation toughness, destabilization toughness, and fracture energy after 100 saline freeze–thaw cycles were 120.69%, 160.02%, and 451.31%, respectively. The results of this study may guide future exploration of the durability and mechanical properties of concrete subjected to freeze–thaw action.

show abstract

“…In construction, steel and PP fibers are commonly employed, although recently there have been investigations on the inclusion of polyvinyl alcohol fibers [20,21]. The addition of steel fibers in concrete is the most employed method, which improves the mechanical behavior of concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Polyvinyl alcohol (PVA) fibers have high strength and ductility, in addition to excellent corrosion resistance without toxicity, improving the subsequent behavior of concrete after cracking and increasing its ductility and toughness. However, the incorporation of PVA fibers produces a significant decrease in the fluidity of concrete mixtures, generating higher porosity and affecting the matrix [20,21].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Cement Mortars Reinforced with Polypropylene Fibers Subjected to High Temperatures and Different Cooling Regimes

2023

View full text Add to dashboard Cite

This study experimentally investigated the mechanical properties of cement mortars that were reinforced with polypropylene (PP) fibers after being exposed to high temperatures and cooled under different regimes. PP fibers were added in amounts of 2, 3 and 4 kg/m3, the residual strengths of the mortars exposed to various temperatures up to 500 °C and cooled under different regimes were determined. It was found that the addition of PP fiber at the level of 2 kg/m3 improves the residual flexural and compressive strengths up to 300 °C. The residual flexural strength was approximately 75%, which is 15% higher than that observed in the simple mortar, and the same happens with the residual compressive strength which was approximately 85%, which is 17% higher than that observed in the simple mortar, regardless of the types of cooling used on the specimens. It was determined by means of a statistical analysis that there are no significant differences in the mechanical properties of the mortar according to the cooling regimes used, after having been exposed to high temperatures. The correlation of the residual flexural and compressive strengths was achieved with a coefficient of determination, R2 = 0.82, and the relationships between the variables were considered acceptable regardless of the types of cooling used.

show abstract

Corrosion-Effected Bond Behavior between PVA-Fiber-Reinforced Concrete and Steel Rebar under Chloride Environment

Cited by 9 publications

References 34 publications

The Influence of Corrosion Processes on the Degradation of Concrete Cover

The Influence of Corrosion Processes on the Degradation of Concrete Cover

Durability and Mechanical Properties of Nano-SiO2 and Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites Subjected to Saline Freeze–Thaw Cycles

Mechanical Properties of Cement Mortars Reinforced with Polypropylene Fibers Subjected to High Temperatures and Different Cooling Regimes

Contact Info

Product

Resources

About