Degradation behavior and mechanism of slate under alternating conditions of freeze-thaw and wet-dry

doi:10.11817/j.issn.1672-7207.2019.06.018

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Degradation behavior and mechanism of slate under alternating conditions of freeze-thaw and wet-dry
	Wu, Guopeng 1,2; Chen, Wenwu 1; Cui, Kai 1,2; Wang, Pei 2
刊名	Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
	2019-06-26
卷号	50 期号:6 页码:1392-1402
关键词	Calcite Compressive strength Degradation Deterioration Feldspar Freezing Hematite Pyrites Slate Stress-strain curves Thawing Weathering Alternation action Degradation behavior Deterioration degree Freeze thaw actions Physical weathering Secondary clay minerals Uniaxial compressive strength Weathering process
ISSN号	16727207
DOI	10.11817/j.issn.1672-7207.2019.06.018
英文摘要	Considering that slate, a material used around hill permafrost region, is naturally exposed to the alternating process with freeze-thaw(F-T) and dry-wet(D-W) process, and that it is one of the main disaster in rock engineering, that rock is deteriorated partially or completely on the surface of slope, the physical weathering of slate was assessed using photographs and measurement of variations in characteristics such as quality, elastic velocity, stress-strain curves and uniaxial compressive strength. Varied numbers of cycles of an alternating combination of the freeze-thaw or dry-wet weathering processes were applied in samples. The results show that in many alternating processes, the content of calcite, feldspar, pyrite and hematite decreases and the amount of secondary clay mineral such as gypsum, illite and mixture of illite and smectite increases. New fractures develop on the surfaces of pores as a result of outward pressure due to this increase in volume, and a lot of water would be absorbed to secondary clay mineral. This process repeats itself with the decrease and increase in temperature and causes undesired deteriorations in the bodies of slate. The experiments also approve that the deterioration degree of dry and wet action of slate is obviously greater than those of freeze-thaw-dry and wet alternating action and freeze-thaw action. © 2019, Central South University Press. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114264]
专题	土木工程学院
作者单位	1.Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, Lanzhou University, Lanzhou; 730000, China; 2.Key Laboratory of Disaster Prevention and Mitigation of Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wu, Guopeng,Chen, Wenwu,Cui, Kai,et al. Degradation behavior and mechanism of slate under alternating conditions of freeze-thaw and wet-dry[J]. Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology),2019,50(6):1392-1402.
APA	Wu, Guopeng,Chen, Wenwu,Cui, Kai,&Wang, Pei.(2019).Degradation behavior and mechanism of slate under alternating conditions of freeze-thaw and wet-dry.Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology),50(6),1392-1402.
MLA	Wu, Guopeng,et al."Degradation behavior and mechanism of slate under alternating conditions of freeze-thaw and wet-dry".Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) 50.6(2019):1392-1402.