Complex structured polymer concrete sleeper for rolling noise reduction of high-speed train system

Ahn, Sangkeun; Kwon, Semin; Hwang, Yeon-Taek; Koh, Hun Yeong; Kim, Kwang Ho; Park, Junhong

doi:10.1016/j.compstruct.2019.110944

Cited by 16 publications

(9 citation statements)

References 20 publications

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“…While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive. Sakdirat Kaewunruen 1 Ahn et al [1] proposed an innovative polymer concrete sleeper for reducing rolling noise of high-speed train systems. The internal structure design of high damping concrete sleepers was conducted by installing polymer concrete to cement concrete sleepers.…”

Section: Take Down Policymentioning

confidence: 99%

“…Note that the most noise issues related to high speed rail systems tend to associate with high frequency noises such as aerodynamics, curve noise, break noise and so on. The limited justification with respect to cost/benefit by Ahn et al [1] would then discourage the industry's adoption of material damping improvement. In fact, recent studies have shown more benefits of damping improvement in concrete sleepers [4][5][6][7][8][9][10].…”

Section: Letter To the Editormentioning

confidence: 99%

“…The paper under discussion [1] presents the importance of dynamic properties (e.g. stiffness, modulus, and damping) for concrete sleepers.…”

Section: Letter To the Editormentioning

confidence: 99%

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Systemic values of enhanced dynamic damping in concrete sleepers – Comments on the paper: Ahn S, Kwon S, Hwang Y-T, Koh H-I, Kim H-S, Park J. Complex structured polymer concrete sleeper for rolling noise reduction of high-speed train system, Composite Structures, 2019, 223:110944 (doi https://doi.org//10.1016/j.compstruct.2019.110944)

Kaewunruen

2020

Composite Structures

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Section: Take Down Policymentioning

confidence: 99%

Section: Letter To the Editormentioning

confidence: 99%

See 1 more Smart Citation

Systemic values of enhanced dynamic damping in concrete sleepers – Comments on the paper: Ahn S, Kwon S, Hwang Y-T, Koh H-I, Kim H-S, Park J. Complex structured polymer concrete sleeper for rolling noise reduction of high-speed train system, Composite Structures, 2019, 223:110944 (doi https://doi.org//10.1016/j.compstruct.2019.110944)

Kaewunruen

2020

Composite Structures

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“…However, the addition of SBR to polymer concrete results in a decrease in its mechanical properties. Ahn et al [ 14 ] proved that wave-type polymer concrete structure was embedded into the cement concrete sleeper, which can promote radiated rolling noise from rail track decreased about 4.22 dB by use of the polymer concrete embedment. Lee et al [ 15 ] investigated the damping ratio of composites composed of preplaced aggregates and polyurethane matrix; the mental results proved that the damping ratio of polyurethane concrete was 12.7 times of ordinary concrete, while its compressive strength was decreased by 80%.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

et al. 2022

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In this paper, cement based on fused silica powder @ polyurethane urea (FSP@PUU) with a micro constrained damping structure was studied. Firstly, FSP@PUU core-shell particles were prepared by heterogeneous stepwise addition polymerization method and added into cement paste as damping filler to form a micro-constrained damping structure inside cement paste. The mechanical property and damping performance of cement-based composites were characterized by compressive strength, dynamic mechanical analysis (DMA) test and modal vibration test. The results showed that the damping performance of FSP @ PUU cement-based composites was affected by temperature, and the loss tangent of cement with 6wt% FSP@PUU increased to about 0.057 at −35 °C to 35 °C, which was 1.5 times cement paste within the glass transition temperature. With 6 wt% FSP@PUU, the damping ratio of cement-based composites increased by 58% compared with cement paste in the frequency range of 175–300 Hz, while the compressive strength decreased by only 5%. The cement with suitable FSP@PUU possesses excellent damping performance.

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“…Even 0.5% of in-service traditional prestressed concrete sleepers fail and require replacement annually, while nearly 1% are discarded due to defects in the manufacturing [ 1 ]. The main alternative sleepers are synthetic composites (SC) [ 2 ] recycled plastics [ 3 , 4 ], low-profile prestressed concrete [ 5 ], polymer concrete [ 6 ] and steel sleepers [ 7 ]. Due to their superior durability, strength/weight ratio, environmental-friendly properties, and excellent resistance to rot and insect attack, alternative sleeper materials from fibre composites and recycled plastics gained significant attention [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Bending Test Method for Polymer Railway Sleeper Materials

et al. 2021

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Alternative sleeper technologies have been developed to address the significant need for the replacement of deteriorating timber railway sleepers. The review of the literature indicates that the railway sleepers might fail while in service, despite passing the evaluation tests of the current composite sleeper standards which indicated that these tests do not represent in situ sleeper on ballast. In this research, a new five-point bending test is developed to evaluate the flexural behaviour of timber replacement sleeper technologies supported by ballast. Due to the simplicity, acceptance level of evaluation accuracy and the lack of in-service behaviour of alternative sleepers, this new testing method is justified with the bending behaviour according to the Beam on Elastic Foundation theory. Three timber replacement sleeper technologies—plastic, synthetic composites and low-profile prestressed concrete sleepers in addition to timber sleepers—were tested under service loading condition to evaluate the suitability of the new test method. To address the differences in the bending of the sleepers due to their different modulus of elasticities, the most appropriate material for the middle support was also determined. Analytical equations of the bending moments with and without middle support settlement were also developed. The results showed that the five-point static bending test could induce the positive and negative bending moments experienced by railway sleepers under a train wheel load. It was also found that with the proposed testing spans, steel-EPDM rubber is the most suitable configuration for low bending modulus sleepers such as plastic, steel-neoprene for medium modulus polymer sleepers and steel-steel for very high modulus sleepers such as concrete. Finally, the proposed bending moment equations can precisely predict the flexural behaviour of alternative sleepers under the five-point bending test.

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Complex structured polymer concrete sleeper for rolling noise reduction of high-speed train system

Cited by 16 publications

References 20 publications

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

Novel Bending Test Method for Polymer Railway Sleeper Materials

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