Degradation of the bond performance between composite limestone powder concrete and steel bars under a sulfate freeze–thaw environment

Wu, Yuan-Zhou; Tang, Peng; Lv, Henglin; Wei, Wei; Zhou, Shu-Chun; Liu, Kefang

doi:10.1016/j.conbuildmat.2023.130515

Cited by 4 publications

(5 citation statements)

References 22 publications

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“…The mass loss was large and the test was stopped. This shows that the coupling effect of sulfate attack and freeze-thaw damage has a great influence on the damage of concrete [5,39]. It can be found from Figure 5b that the effect of salt freezing cycles on the mass loss of CLP concrete specimens is much greater than that of water freezing cycles.…”

Section: Mass Lossmentioning

confidence: 80%

“…The mass loss was large and the test was stopped. This shows that the coupling effect of sulfate attack and freeze-thaw damage has a great influence on the damage of concrete [5,39].…”

Section: Mass Lossmentioning

confidence: 84%

“…(3) Mixing water: commonly used tap water. (4) Water reducer: PCA-I polycarboxylate high-performance water reducer with a value of 28% of water reduction rate [5].…”

Section: Methodsmentioning

confidence: 99%

“…In order to save resources and protect the environment, limestone powder, fly ash, slag, and other mineral admixtures can be used to partially or completely replace the cement in traditional concrete [1][2][3][4]. This kind of concrete with diversified cementitious materials is called composite limestone powder (CLP) concrete [5]. Frost resistance is an important index of concrete durability, which is very important to evaluate the performance of concrete structures in cold regions [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Frost Resistance of Composite Limestone Powder Concrete against Coupling Effects of Sulfate Freeze–Thaw

Zhang,

Lv,

Zhou

et al. 2023

Buildings

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Concrete in saline or coastal settings exposed to freezing temperatures is frequently affected by coupling actions of sulfate assault and freeze–thaw degradation, reducing the service life of concrete structures significantly. This study conducted an accelerated freeze–thaw cycle test in pure water and Na2SO4 solution with a mass proportion of 5% to examine the coupling impact of sulfate freeze–thaw on the frost resistance of composite limestone powder (CLP) concrete. Combined with SEM and XRD methods, the performance degradation mechanisms of composite limestone powder (CLP) concrete in coupling sulfate freeze–thaw conditions were analyzed with a microscopic point of view. The findings demonstrated that limestone powder has a filling effect but the activity is low. When the content is 10~20%, the chemical response is higher than the physical response. The pozzolanic effect of fly ash and slag can improve the pore structure and improve the compactness of concrete. The “superposition effect” of limestone powder, fly ash, and slag can improve the frost resistance of CLP concrete. The scenario of salt freezing cycles has negative effects that are worse than those of water freezing cycles on the antifreeze performance of CLP concrete, including apparent morphology, mass loss, relative dynamic modulus of elasticity, and compressive strength. Sulfate’s activation effect boosts slag’s activity effect, which significantly promotes the antifreeze performance of concrete subjected to salt frozen cycles over water frozen cycles. The freeze–thaw damage model of CLP concrete under coupling sulfate freeze–thaw is established through theorem analysis and experiment statistics, laying a theoretical framework for the popularization and use of this concrete.

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Section: Mass Lossmentioning

confidence: 80%

“…The mass loss was large and the test was stopped. This shows that the coupling effect of sulfate attack and freeze-thaw damage has a great influence on the damage of concrete [5,39].…”

Section: Mass Lossmentioning

confidence: 84%

“…(3) Mixing water: commonly used tap water. (4) Water reducer: PCA-I polycarboxylate high-performance water reducer with a value of 28% of water reduction rate [5].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study on the Frost Resistance of Composite Limestone Powder Concrete against Coupling Effects of Sulfate Freeze–Thaw

Zhang,

Lv,

Zhou

et al. 2023

Buildings

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show abstract

“…Shang and Song (2006) tested freezethaw damaged concrete subjected to biaxial compressive stresses and proposed a biaxial compressive strength formula. The degradation test for the bond performance between composite limestone-powder-concretes and steel bars, was conducted by Wu et al (2023) In the research, the specimens were soaked in a sulfate freeze-thaw environment. Kurihashi et al (2021) conducted impact loading experiments to investigate the behavior of freeze-thaw damaged reinforced concrete (RC) beams.…”

Section: Introductionmentioning

confidence: 99%

Bond Strength of Post-installed Anchor Adhering to Damaged Concrete by Freeze-thaw Action

Yano,

Shiokoshi,

Takase

et al. 2024

ACT

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Reinforced concrete (RC) structures in cold regions are susceptible to surface deterioration due to freeze-thaw cycles (FTC). For sustainable development goals (SDGs) and a decarbonized society, damaged structures should be repaired and reinforced. Post-installed anchors are commonly used for seismic retrofitting and equipment fixation. However, research on the bond characteristics of damaged concrete is limited. Therefore, in this study, the bonding performance of adhesive anchors in damaged concrete was investigated. Liquid nitrogen was employed to subject the concrete surface to FTC; subsequently, bond-slip tests were conducted with the degree of deterioration serving as a parameter. The results suggested, the bond strength decreased as the degree of damage increased. The reduction ratios of the post-installed anchor with epoxy and cement-based resins were almost identical. Furthermore, a bond strength equation was proposed by referring to the bond-slip model between the rebar and concrete (fib 1990). The test results were well predicted with a correlation coefficient of 0.94. This study is based on previous studies (Yano et al. 2022(Yano et al. , 2023 but presents new findings.

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Experimental investigation on bond properties between rebar and concrete considering rebar corrosion and concrete deterioration caused by sulfate attack

Song,

Wang,

Sun

et al. 2024

Construction and Building Materials

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Degradation of the bond performance between composite limestone powder concrete and steel bars under a sulfate freeze–thaw environment

Cited by 4 publications

References 22 publications

Study on the Frost Resistance of Composite Limestone Powder Concrete against Coupling Effects of Sulfate Freeze–Thaw

Study on the Frost Resistance of Composite Limestone Powder Concrete against Coupling Effects of Sulfate Freeze–Thaw

Bond Strength of Post-installed Anchor Adhering to Damaged Concrete by Freeze-thaw Action

Experimental investigation on bond properties between rebar and concrete considering rebar corrosion and concrete deterioration caused by sulfate attack

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