Effect of freeze–thaw cycling on mechanical properties of polyethylene fiber and steel fiber reinforced concrete

Dong, Fangyuan; Wang, Hanpeng; Yu, Jiangtao; Liu, Keke; Guo, Zhenwen; Duan, Xinzhi; Qiu, Xing

doi:10.1016/j.conbuildmat.2021.123427

Cited by 51 publications

(11 citation statements)

References 26 publications

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“…However, it can be seen that mortars that incorporated mineral wool insulation had greater stability and experienced less degradation when subjected to freeze-thaw cycles. These results are in agreement with those obtained by other authors who have studied the beneficial effect of the incorporation of fibers in the mortar matrix to increase the durability of these construction materials [97].…”

Section: Freeze-thaw Testsupporting

confidence: 93%

Circular Building Process: Reuse of Insulators from Construction and Demolition Waste to Produce Lime Mortars

et al. 2022

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This research aims to revalue the possibilities presented by lime mortars for use in renovation and as cladding material on facades. The study focuses on analyzing the technical feasibility of lime mortars with the incorporation of residues from three types of thermal insulation materials: expanded polystyrene with graphite especially suitable for use on facades; expanded polystyrene for use indoors; and insulating mineral wool. The incorporation of these construction and demolition residues makes it possible to improve several technical performance aspects of lime mortars, and to incorporate circular economy criteria in the manufacturing process of these materials. The results showed that the incorporation of mineral wool improves the mechanical resistance to the bending of mortars, increases their durability against freeze–thaw cycles and salt crystallization, and reduces the final shrinkage of mortars. For their part, mortars with the addition of polystyrene-insulating residues reduce mechanical resistance, but also reduce thermal conductivity, and are lighter, which is why they are shown as a possible alternative for use in precast.

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Section: Freeze-thaw Testsupporting

confidence: 93%

Circular Building Process: Reuse of Insulators from Construction and Demolition Waste to Produce Lime Mortars

et al. 2022

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“…In the case of tensile strength, when the water swelling stress exceeds the resistance of the ECC matrix, the internal water swelling stress is released through micro cracks. The freeze–thaw cycles damage the matrix and destroy the fiber-matrix interface [ 4 ], shorten the peak displacement when the fiber slips out of the matrix [ 56 ], and cause chemical adhesion and reduced friction at the same time. The fiber is still pulled out, not pulled off, and the strain hardening effect still exists.…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

Effect of Temperatures and Moisture Content on the Fracture Properties of Engineered Cementitious Composites (ECC)

Gao

Xie

2022

Materials

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This research will help to improve our understanding of the fracture properties of ECC at low temperatures (long-term low temperatures, freeze–thaw) and evaluate the safety properties of ECC under low-temperature conditions. Three levels of saturation (saturated, semi-saturated, and dry), four target temperatures (20, 0, −20, and −60 °C), and the effect of the coupled of the two on the mode I fracture properties of ECC were investigated. Then, we compared and analyzed the fracture properties of ECC loaded at 20 and −20 °C, after different freeze–thaw cycles (25, 50, 100 cycles), which were compared with saturated specimens without freeze–thaw at the four target temperatures to analyze the differences in low-temperature and freeze–thaw failure mechanisms. Temperatures and saturation have a significant effect on the fracture properties. Low temperatures and freeze–thaw treatments both decreased the nominal fracture energy of ECC. Distinct differences in matrix and fiber-matrix interface damage mechanisms have been discovered. Low temperatures treatment transforms ECC from a ductile to a brittle fracture mode. However, even after 100 freeze–thaw cycles, it remains ductile fractured. This study complements the deficiencies of ECC in low-temperature theoretical and experimental applications, and it sets the stage for a broad range of ECC applications.

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“…In addition, the reinforcing effect of different fibers on flexural strength is different, showing a positive correlation trend with an elastic modulus of fiber. The fiber with a large elastic modulus has a greater reinforcing effect on the flexural strength of concrete, which may be why the crack resistance effect of high elastic modulus fiber is more obvious [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. At the same time, the content of fiber has a great influence on the strength of concrete.…”

Section: Discussionmentioning

confidence: 99%

“…From this point of view, the improvement effect of CF on the frost resistance of concrete is not as good as FC, which agrees with the freeze–thawing results. It can be proved that freeze–thaw cycles impair the fiber/matrix interfacial bond, which is attributed to be the main cause of the degradation of durability [ 37 ]. Therefore, the interfacial bonding between fiber and matrix is a performance that should be paid special attention to in airport pavement concrete.…”

Section: Discussionmentioning

confidence: 99%

Effects of Fiber and Surface Treatment on Airport Pavement Concrete against Freeze–Thawing and Salt Freezing

Lai²,

Ma³

et al. 2022

Materials

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Airport pavement concrete often suffers from freeze–thawing damage in high latitude and cold areas. In addition, the use of aircraft deicer makes the airport pavement concrete suffer from salt-freezing damage. To improve the durability of airport pavement concrete, modified polyester synthetic fiber (FC), cellulose fiber (CF), and basalt fiber (BF) reinforced concrete were prepared in this paper. The mechanical strength, pore structure, and frost resistance (freeze–thawing and salt freezing) of fiber-reinforced concrete were investigated. The effects of the combined action of fiber (fiber type and content) and surface treatment methods (spraying silane and impregnating silane) on the frost resistance of concrete were investigated. The results show that the flexural strength of concrete is positively correlated with the elastic modulus of fiber, but has little effect on the compressive strength. Fiber can reduce mass loss and dynamic modulus loss of concrete subjected to frost damage. FC more effectively improved the frost resistance of concrete than CF. After 30 cycles of salt freezing, the spalling amount of concrete sprayed or soaked with silane was decreased by 65.5% and 55.5%, respectively. Adding fiber and impregnating silane reduced the spalled concrete by up to 70.5%. Spraying silane treatment is better than impregnating silane treatment in enhancing the frost resistance of concrete because a better silane condensation reaction is achieved with spraying silane.

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Effect of freeze–thaw cycling on mechanical properties of polyethylene fiber and steel fiber reinforced concrete

Cited by 51 publications

References 26 publications

Circular Building Process: Reuse of Insulators from Construction and Demolition Waste to Produce Lime Mortars

Circular Building Process: Reuse of Insulators from Construction and Demolition Waste to Produce Lime Mortars

Effect of Temperatures and Moisture Content on the Fracture Properties of Engineered Cementitious Composites (ECC)

Effects of Fiber and Surface Treatment on Airport Pavement Concrete against Freeze–Thawing and Salt Freezing

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