Experimental study on the pore structure variation of self-compacting rubberised concrete under fatigue load

Yuan, Jiayi; Chen, Xudong; Shen, Nan; Fan, Xiangqian; Lü, Jun

doi:10.1080/14680629.2019.1643396

Cited by 12 publications

(8 citation statements)

References 28 publications

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“…Scholars, such as Vicente, have reported similar results. 3,12,13 On the contrary, P I , P III , P MI , P MIII , S I , and S III have low correlation with fatigue life, and the relationship between fractal dimension D Na , D Nb and concrete fatigue life is insignificant. The reason for this problem is that P total contains the pore structure information of Parts I and III, whereas the other parameters only characterize a certain part of the pore structure and thus cannot comprehensively characterize the pore structure information of concrete.…”

Section: Relationship Between Fatigue Life and Characteristic Paramet...mentioning

confidence: 99%

“…The fatigue life of concrete pavements decreases under the combined action of temperature difference and load because of the development and penetration of microscopic defects, such as concrete pores and cracks 5,10 ; this explanation has been agreed on by scholars. Based on theories of damage mechanism and cumulative damage, scholars have used damage parameters, such as the number and volume of cracks and pores, to characterize the fatigue performance of concrete in the microscopic aspect 3,11,12 . Previous studies have shown that the higher the porosity, the lower the fatigue life of concrete 12,13 ; however, porosity does not represent all the information about the pore structure of concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Based on theories of damage mechanism and cumulative damage, scholars have used damage parameters, such as the number and volume of cracks and pores, to characterize the fatigue performance of concrete in the microscopic aspect 3,11,12 . Previous studies have shown that the higher the porosity, the lower the fatigue life of concrete 12,13 ; however, porosity does not represent all the information about the pore structure of concrete. The pore size, shape, and other parameters of the internal pores of concrete are considerably different and have a substantial influence on the performance of concrete 14–18 …”

Section: Introductionmentioning

confidence: 99%

“…Relationship between the characteristic parameters of the threedimensional pore structure and the fatigue life of concrete On the basis of the analysis in Section 4.3, the relationship between the characteristic parameters of threedimensional pore structure and the fatigue life of concrete is established and expressed as Equation (12).…”

mentioning

confidence: 99%

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Pore structure of concrete under fatigue load in areas with large temperature differences

Shi

Zhao

2021

Structural Concrete

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To study the effect of pore structure changes on the fatigue life of concrete in areas with large temperature differences, a concrete fatigue test program was designed after a temperature cycle of À50 to 70 C. Results show that temperature differences considerably influence pores with a size ranging from 0.1 to 27.98 nm. Furthermore, the fatigue life of concrete gradually decreases with the increase in the pore structure parameters of 0.1 to 27.98 nm. This result indicates that the effect of temperature difference on the fatigue life of concrete in areas with large temperature differences must not be ignored. The combined effect of temperature differences and load increases the coarsening rate of the pore structure, and the load remarkably affects pores with a size ranging from 524.26 to 10,000 nm. To characterize the pore structure of concrete under temperature cycling and fatigue load, two pore structure characteristic parameters, namely, comprehensive change rate of pore size (S z ) and pore structure complexity coefficient (C z ), are proposed. These parameters, together with the total porosity (P total ), form a three-dimensional pore structure characteristic parameter and establish the relationship expression between the three-dimensional pore structure parameters and the fatigue life of concrete (N); thus, they provide basis for the prediction of the fatigue life of concrete on the basis of pore structure.

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Section: Relationship Between Fatigue Life and Characteristic Paramet...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Pore structure of concrete under fatigue load in areas with large temperature differences

Shi

Zhao

2021

Structural Concrete

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“…At present, China has laid CRTSIII SBT on many lines, such as the Cheng-Guan line and Beijing-Shenzhen passenger dedicated line [20]. The track structure is in good general service condition, maintenance-free, and has high stability.…”

Section: Damage Status Of the Base Plate Of Crtsiii Sbtmentioning

confidence: 99%

Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load

Zeng

Huang

et al. 2022

Applied Sciences

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To meet the transportation requirements of heavy-haul trains, it is necessary to consider the use of prestressed reinforced concrete ballastless tracks. Therefore, the CRTSIII SBT (China Railway Track System III-type slab ballastless track) has been considered for its convenient construction and geometric adjustment. Considering the problems existing in the base plate of CRTSIII SBT in heavy-haul applications, an indoor test and simulation were conducted to explore the cracking phenomenon of the base plate concrete under fatigue load. The reliability of the simulation was verified through the experimental results. A fatigue crack development law of the base plate structure was established. Furthermore, the influence of the load position, the thickness of self-compacting concrete and axle loads on the fatigue damage of the base plate structure were investigated. For the CRTSIII SBT subjected to heavier axle loads, it is appropriate to thicken the self-compacting concrete layer and strengthen the concrete and steel reinforcement at the plate end to reduce fatigue damage and cracks. The research results can serve as a basis for the optimization of the CRTSIII SBT base plate structure in heavy-haul railway applications.

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Properties of Self-compacting Concrete Incorporating Recycled Tyre Rubber Particles—A Review

Zang,

Xu,

Zhang

et al. 2024

Lecture Notes in Civil Engineering

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Experimental study on the pore structure variation of self-compacting rubberised concrete under fatigue load

Cited by 12 publications

References 28 publications

Pore structure of concrete under fatigue load in areas with large temperature differences

Pore structure of concrete under fatigue load in areas with large temperature differences

Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load

Properties of Self-compacting Concrete Incorporating Recycled Tyre Rubber Particles—A Review

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