Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions

Freeze-thaw damage is a typical distress incurred in road and railway engineering in cold regions. Concrete waterproofing layer is commonly used in high-speed railway tracks to prevent the penetration of surface water, however, it cracks easily under thermal stress, especially in cold regions. Recen...
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Autor*in:	Song Liu [verfasserIn] Jun Yang [verfasserIn] Xianhua Chen [verfasserIn] Guotao Yang [verfasserIn] Degou Cai [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2018

Schlagwörter:	high-speed railway cold region waterproofing layer mastic asphalt

Übergeordnetes Werk:	In: Applied Sciences - MDPI AG, 2012, 8(2018), 5, p 667
Übergeordnetes Werk:	volume:8 ; year:2018 ; number:5, p 667

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/app8050667

Katalog-ID:	DOAJ006330460

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callnumber-first	T - Technology
author	Song Liu
spellingShingle	Song Liu misc TA1-2040 misc QH301-705.5 misc QC1-999 misc QD1-999 misc high-speed railway misc cold region misc waterproofing layer misc mastic asphalt misc Technology misc T misc Engineering (General). Civil engineering (General) misc Biology (General) misc Physics misc Chemistry Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions
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topic_title	TA1-2040 QH301-705.5 QC1-999 QD1-999 Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions high-speed railway cold region waterproofing layer mastic asphalt
topic	misc TA1-2040 misc QH301-705.5 misc QC1-999 misc QD1-999 misc high-speed railway misc cold region misc waterproofing layer misc mastic asphalt misc Technology misc T misc Engineering (General). Civil engineering (General) misc Biology (General) misc Physics misc Chemistry
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title	Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions
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title_sort	application of mastic asphalt waterproofing layer in high-speed railway track in cold regions
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title_auth	Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions
abstract	Freeze-thaw damage is a typical distress incurred in road and railway engineering in cold regions. Concrete waterproofing layer is commonly used in high-speed railway tracks to prevent the penetration of surface water, however, it cracks easily under thermal stress, especially in cold regions. Recently solutions have been proposed to increase the waterproofing layer’s cracking resistance by using asphalt layers. Nonetheless, the use of emulsified asphalt as well as dense-graded asphalt mixture were not effective enough. To improve the effectiveness, in this study, mastic asphalt was designed for application as the waterproofing layer on the subgrade surface of high-speed railway tracks in cold regions. The overall performance of mastic asphalt was preliminarily evaluated by laboratory tests, then a 200-m test section was constructed for field validation in northeastern China as part of a new high-speed railway line, and water content sensors were placed inside the subgrade to monitor the performance of the mastic asphalt waterproofing layer (MAWL). The subsequent field investigation and monitoring data during the two years operation showed that MAWL dramatically outperformed the conventional concrete waterproofing layer in terms of waterproof performance. Plenty of serious cracks were found in the conventional concrete waterproofing layer, but only a limited number of local cracks were observed in MAWL. As a result, MAWL keeps the water content of subgrade at a stable level. In addition, MAWL showed relatively high stability during the two years investigation period, and no obvious deterioration was observed in the test section.
abstractGer	Freeze-thaw damage is a typical distress incurred in road and railway engineering in cold regions. Concrete waterproofing layer is commonly used in high-speed railway tracks to prevent the penetration of surface water, however, it cracks easily under thermal stress, especially in cold regions. Recently solutions have been proposed to increase the waterproofing layer’s cracking resistance by using asphalt layers. Nonetheless, the use of emulsified asphalt as well as dense-graded asphalt mixture were not effective enough. To improve the effectiveness, in this study, mastic asphalt was designed for application as the waterproofing layer on the subgrade surface of high-speed railway tracks in cold regions. The overall performance of mastic asphalt was preliminarily evaluated by laboratory tests, then a 200-m test section was constructed for field validation in northeastern China as part of a new high-speed railway line, and water content sensors were placed inside the subgrade to monitor the performance of the mastic asphalt waterproofing layer (MAWL). The subsequent field investigation and monitoring data during the two years operation showed that MAWL dramatically outperformed the conventional concrete waterproofing layer in terms of waterproof performance. Plenty of serious cracks were found in the conventional concrete waterproofing layer, but only a limited number of local cracks were observed in MAWL. As a result, MAWL keeps the water content of subgrade at a stable level. In addition, MAWL showed relatively high stability during the two years investigation period, and no obvious deterioration was observed in the test section.
abstract_unstemmed	Freeze-thaw damage is a typical distress incurred in road and railway engineering in cold regions. Concrete waterproofing layer is commonly used in high-speed railway tracks to prevent the penetration of surface water, however, it cracks easily under thermal stress, especially in cold regions. Recently solutions have been proposed to increase the waterproofing layer’s cracking resistance by using asphalt layers. Nonetheless, the use of emulsified asphalt as well as dense-graded asphalt mixture were not effective enough. To improve the effectiveness, in this study, mastic asphalt was designed for application as the waterproofing layer on the subgrade surface of high-speed railway tracks in cold regions. The overall performance of mastic asphalt was preliminarily evaluated by laboratory tests, then a 200-m test section was constructed for field validation in northeastern China as part of a new high-speed railway line, and water content sensors were placed inside the subgrade to monitor the performance of the mastic asphalt waterproofing layer (MAWL). The subsequent field investigation and monitoring data during the two years operation showed that MAWL dramatically outperformed the conventional concrete waterproofing layer in terms of waterproof performance. Plenty of serious cracks were found in the conventional concrete waterproofing layer, but only a limited number of local cracks were observed in MAWL. As a result, MAWL keeps the water content of subgrade at a stable level. In addition, MAWL showed relatively high stability during the two years investigation period, and no obvious deterioration was observed in the test section.
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title_short	Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions
url	https://doi.org/10.3390/app8050667 https://doaj.org/article/321b4d844ea442329c03f8e6cab981f6 http://www.mdpi.com/2076-3417/8/5/667 https://doaj.org/toc/2076-3417
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The subsequent field investigation and monitoring data during the two years operation showed that MAWL dramatically outperformed the conventional concrete waterproofing layer in terms of waterproof performance. Plenty of serious cracks were found in the conventional concrete waterproofing layer, but only a limited number of local cracks were observed in MAWL. As a result, MAWL keeps the water content of subgrade at a stable level. 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Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions

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