Performance optimization of hybrid fiber concretes against acid and sulfate attack

Bankır, Muzeyyen Balcıkanlı; Sevim, Umur Korkut

doi:10.1016/j.jobe.2020.101443

Cited by 37 publications

(11 citation statements)

References 44 publications

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“…The fibers were uniformly oriented and distributed in the matrix, which acted as a secondary micro-strengthening. At the same time, the fiber interaction formed a three-dimensional mesh structure, and the bridging effect of the fiber strengthened the bond between the fiber and the matrix, thereby effectively enhancing the concrete’s ability to resist acid rain corrosion [ 26 ]. As shown in Figure 6 e, S2B0.2 had a large crack generation because of the corrosion of SF by the corrosive ions that made the fiber volume increase and led to the concrete cracking.…”

Section: Resultsmentioning

confidence: 99%

Research on Damage and Deterioration of Fiber Concrete under Acid Rain Environment Based on GM(1,1)-Markov

Huang

Zhu

et al. 2021

Materials

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With steel fiber and basalt fiber volume dosing serving as variation parameters, a total of 200 d cycles of acid rain corrosion cycle tests were conducted on fiber concrete in this study. We selected three durability evaluation parameters to assess the degree of damage deterioration on fiber concrete, used scanning electron microscopy, mercury intrusion porosimetry, and a dimensional microhardness meter to analyze the concrete micromorphology, and established a GM(1,1)-Markov model for life prediction of its durability. Results reveal that the acid rain environment is the most sensitive to the influence of the relative dynamic elastic modulus evaluation parameter, and concrete has specimens that show failure damage under this parameter evaluation. Incorporation of fibers can reduce the amount of corrosion products inside the concrete, decrease the proportion of harmful pores, optimize the mean pore-size, and significantly improve the resistance to acid rain attack. Concrete with 2% steel fiber and 0.1% basalt fiber by volume has the least change in durability damage, and the predicted service life by GM(1,1)-Markov model is 322 d.

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Section: Resultsmentioning

confidence: 99%

Research on Damage and Deterioration of Fiber Concrete under Acid Rain Environment Based on GM(1,1)-Markov

Huang

Zhu

et al. 2021

Materials

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“…After 15 sulfate cycles, the compressive strength of the polymer with 0.2% polypropylene fiber, 0.3% basalt fiber and 0.4% steel fiber reaches 67.9MPa [69]. Besides, it is also found that steel fiber and propylene fiber are acid resistant, while synthetic fiber performs weakly in this aspect [70]. The durability of the geopolymer with a fiber content of 1.2 kg/m 3 remains good after soaking 60 times in 5% sodium sulfate solution [71].…”

Section: Chemical Resistancementioning

confidence: 92%

“…The improvement effect of fiber on shrinkage resistance of materials is polyvinyl alcohol fiber, glass fiber and lignin fiber in order [6]. The influence of steel fiber, polypropylene fiber and polyvinyl alcohol fiber on the low temperature erosion bending strength and compressive strength of ultra-high performance concrete (UHPC) is also studied, and the results show that the addition of steel fiber and polyvinyl alcohol fiber increases the bending strength and compressive strength of UHPC, and that the bending strength of UHPC increases by 70.06% with the increase of the length-diameter ratio of steel fiber. The compressive strength of UHPC decreases after cryogenic attack.…”

Section: Other Performancesmentioning

confidence: 99%

Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progressd

Qin

Yan

Zhou

et al. 2022

Preprint

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Geopolymer concrete shares similar mechanical properties with ordinary Portland cement (OPC) concrete, and is even provided with better performances in high temperature and high corrosion circumstances. However, geopolymer binder is still subject to the disadvantages of large shrinkage and high brittleness, which greatly limit its application. Fiber reinforcement is widely used in various geopolymer systems to overcome the brittleness issue, but retains the high strength. Over the past 10 years, a significant advance has been made in the research of fiber reinforced geopolymers in terms of toughening efficiency and durability improvement. This paper, as a mini review, focuses on three types of fibers, i.e., inorganic fiber, natural fiber and synthetic fiber, in geopolymers, and their specific effects on compressive, flexural and tensile strengths, fractural toughness, shear strength and durability including shrinkage, chemical and freezing-thaw resistances. The recement understanding of bonding mechanism and fiber-geopolymer interface are also discussed, and knowledge gaps and future work challenges are correspondingly pointed out.

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“…This technique can significantly enhance the performance of concrete. Among the types of hybrid fibres, hybrid steel–polypropylene fibre is the most studied and widely used [ 6 , 11 ]. However, because of the large amount of chloride in the marine environment, steel fibres will have the same corrosion problem as reinforcing steel.…”

Section: Introductionmentioning

confidence: 99%

Chloride Diffusion Property of Hybrid Basalt–Polypropylene Fibre-Reinforced Concrete in a Chloride–Sulphate Composite Environment under Drying–Wetting Cycles

Yong

Niu

2021

Materials

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The effect of fibre reinforcement on the chloride diffusion property of concrete is controversial, and the coupling effect of sulphate erosion and drying–wetting cycles in marine environments has been neglected in previous studies. In this study, the chloride diffusion property of hybrid basalt–polypropylene fibre-reinforced concrete subjected to a combined chloride–sulphate solution under drying–wetting cycles was investigated. The effects of basalt fibre (BF), polypropylene fibre (PF), and hybrid BP–PF on the chloride diffusion property were analysed. The results indicate that the presence of sulphate inhibits the diffusion of chloride at the early stage of erosion. However, at the late stage of erosion, sulphate does not only accelerate the diffusion of chloride by causing cracking of the concrete matrix but also leads to a decrease in the alkalinity of the pore solution, which further increases the risk of corrosion of the reinforcing steel. An appropriate amount of fibre can improve the chloride attack resistance of concrete at the early stage. With the increase in erosion time, the fibre effectively prevents the formation and development of sulphate erosion microcracks, thus reducing the adverse effects of sulphate on the resistance of concrete to chloride attack. The effects of sulphate and fibre on the chloride diffusion property were also elucidated in terms of changes in corrosion products, theoretical porosity, and the fibre-matrix interface transition zone.

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Performance optimization of hybrid fiber concretes against acid and sulfate attack

Cited by 37 publications

References 44 publications

Research on Damage and Deterioration of Fiber Concrete under Acid Rain Environment Based on GM(1,1)-Markov

Research on Damage and Deterioration of Fiber Concrete under Acid Rain Environment Based on GM(1,1)-Markov

Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progressd

Chloride Diffusion Property of Hybrid Basalt–Polypropylene Fibre-Reinforced Concrete in a Chloride–Sulphate Composite Environment under Drying–Wetting Cycles

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