Evaluation of the bond strength of a novel concrete for rapid patch repair of pavements

Guo, Tianxiong; Xie, Yuchen; Weng, Xingzhong

doi:10.1016/j.conbuildmat.2018.08.007

Cited by 47 publications

(13 citation statements)

References 54 publications

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“…Espeche et al [ 14 ] proved the bonding properties were closely related to the adhesion of repair material and the roughness of the concrete substrate. Guo et al [ 17 ] found that as the surface roughness increased, the proportion of the aggregates of the repair concrete embedded into the concrete substrate interior increased, which resulting in the increase of the effective bonding area, and thus the bonding property was improved.…”

Section: Introductionmentioning

confidence: 99%

“…The consideration of durability, such as frost resistance, is essential to evaluate the reliability of repaired structures. Guo et al [ 17 ] found that the splitting tensile strength of low and high roughness specimens decreased to 44.2% and 74.5% after 100 times of F-T cycles, respectively. Qian et al [ 18 ] studied the factors affecting the interfacial tensile bond of concrete repair system and found that the splitting tensile strength of adhesive decreased significantly under the freeze-thawing (F-T) cycles.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Fan

Zhang

2021

Materials

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The bonding surface structure generated by the repair of concrete structures has been paid more attention as a weak point. The effects of old concrete age, interface roughness, and freeze-thawing (F-T) attack on adhesive interface are comprehensively investigated. In this study, six kinds of interface roughness and five different old concrete age are designed. The interfacial bonding property is mainly evaluated by splitting tensile strength (fts). Fractal analysis was used to characterize the interface roughness using laser scanning data. In general, the fts increased with the increasing value of interface fractal dimension. The relationship between fts and fractal dimension value was further analyzed, considering the old concrete ages and the F-T cycles. The results show that the effect of roughness on the bonding property of new-to-old concrete is more significant than the age of old concrete, and the influence of the F-T cycles on the bonding surface is mainly reflected in the initial stage of the F-T deterioration process. The relative dynamic elasticity modulus decreased obviously under F-T cycles, especially for the specimens with low interface roughness. In combination with the results of two non-destructive methods (ultrasonic non-destructive test and relative dynamic elastic modulus test), the larger roughness and the smaller age of old concrete can improve the bond performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Fan

Zhang

2021

Materials

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“…In general, SAC's early strength is always focused at the 12~24 h. However, to meet the accelerated construction's needs, the 6-h strength was put forward. The fast-hardening sulphoaluminate cement (FHSC) is the kind of cement that the concrete with can succeed the target strength within 6 hours (Guo et al 2018;Kwon et al 2018). To prepare FHSC, it was reported that the early strength agent has little influence on improving the strength at 6 hours.…”

Section: Literature Reviewmentioning

confidence: 99%

Development of a fast-hardening retarding high-early-strength concrete with low-alkalinity sulphoaluminate cement and practical application

Sha

Xiang²,

Feng

et al. 2020

ABEN

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To widen bridges, a usual method is to cast joint connections between new and old bridge decks without traffic interruption. The traffic vibrations have negative influence on the quality of joint connections. Shortening the construction time can alleviate the impact on the traffics, a fast-hardening retarding high-early-strength concrete (FRHC) for the connections is in need. In this study, low-alkalinity sulphoaluminate cement (LASC) concrete was modified to gain these characteristics. Based on FRHC concrete, four slab specimens including a monolithic concrete slab and three joint FRHC slabs were cast to investigate their flexural behaviors. With proper splicing details in joint connections, the joint FRHC specimens behaved approximately similar to the monolithic specimen. Combing the laboratory tests and engineering practice, the newly developed FRHC mixture succeeded in fast-hardening, retarding and high-early strength and the joint connections filled with FRHC have a good flexural performance.

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“…Zhang et al, for instance, adopted a microwave curing progress to epoxy mortar for rapid maintenance of concrete pavement [10]. Additionally, Guo et al experimentally evaluated the bond strength of the rapid repair material, which was a kind of polymermodi ed cementitious material, by implementing concrete patch repair [11]. Furthermore, Lee et al [12] determined the mechanical and permeability properties of latex-modi ed bre-reinforced roller-compacted rapid-hardening cement concrete, which was used for emergency repair of concrete pavements [9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Application of Ultra-Rapid-Hardening Mortar for Rigid Small Element Pavement

Han

Gong

Cho

et al. 2019

Advances in Materials Science and Engineering

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Natural stones have been typically used as a paving material in historically conserved areas due to architectural aesthetic aspect and environmental impact. However, they have been traditionally suggested in light traffic volume due to the defects caused by the increased traffic loading and volume. The failures can lead to diverse problems such as losing flatness, severe damage to both vehicles and pedestrians, high traffic congestion, maintenance cost, etc. In order to overcome these obstacles, ultra-rapid-hardening (URH) cement for rigid small element pavement (SEP) was implemented as both jointing and laying course materials. Additionally, their mechanical properties were investigated according to BS 7533-4 and National Stone Surface (NSS) in the UK. Preliminarily, the proper mix mortar design was found by comparing design parameters. The compressive and flexural strength of the joint and laying course by age was verified, and the results in early-age stage were satisfied with the requirements. The adhesive and shear strengths depending upon the width of the joint were determined, and from the test outcomes, the optimal thickness of the joint was found as 15 mm. Furthermore, by contrasting the compressive strength of the laying course with the punching shear strength, the shear strength regarding joint states was increased by up to 134.3% (fully restrained), 127.9% (semirestrained), and 107.2% (non restrained). This investigation would be possible to use as baseline data for an evaluation of the long-term performance of rigid SEP.

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Evaluation of the bond strength of a novel concrete for rapid patch repair of pavements

Cited by 47 publications

References 54 publications

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Development of a fast-hardening retarding high-early-strength concrete with low-alkalinity sulphoaluminate cement and practical application

Experimental Investigation on the Application of Ultra-Rapid-Hardening Mortar for Rigid Small Element Pavement

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