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Article: Variation features of pore radius and particle diameter distributions and mineral content of completely decomposed granite and correlation of parameters

TitleVariation features of pore radius and particle diameter distributions and mineral content of completely decomposed granite and correlation of parameters
Authors
KeywordsCompletely decomposed granite
Correlation coefficient
Micro-properties
Mineral content
Particle diameter
Pore radius
Issue Date2004
Publisher中國科學院武漢巖土力學研究所. The Journal's web site is located at http://ytlx.chinajournal.net.cn/
Citation
Yantu Lixue/Rock And Soil Mechanics, 2004, v. 25 n. 10, p. 1545-1550 How to Cite?
AbstractThe three aspects with respect to micro-properties of the completely decomposed granite (CDG) as the distribution of pore radius, particle diameters and mineral content play a major role in determining the engineering geological features of the CDG. In theoretical study and engineering practice the following parameters are used to describe the characteristics in the three aspects: large, middle and small, micro-pores, gravel, sand, silt and clay particles, three major mineral components (quartz, feldspar and clay minerals), etc. How large of the variation range of these indices in one certain size of trial pits and blocks? How about the correlation of the indices in the three parts? As factors of soil structure, how large of their weight ratios once the soil structure is to be under considerations? In this paper, a total of 51 nos. specimens from 18 nos. blocks from three trial pits of two slopes in Kowloon, Hong Kong, were taken as examples. The test is carried out by means of the mercury injection, particle size distribution and X-ray diffraction. After preliminary analysis, it is found that the CDG with coarse particle portions is very different from that with fine particle portions. The former belongs to gravel soil and sandy gravel soil, and some of it is gravel-bearing soil, with more big pores, more quartz and clay minerals. The latter belongs to gravel-bearing soil, some is fine sandy soil and sub-sandy soil, with more micropores, more feldspars. Variations of feldspar and clay mineral contents are inverse to each other. Furthermore, the interaction matrix is applied for analysis of the correlation of the 9 indices. As a result, it is found that the correlation coefficient varies to a great extent. According to the value of the correlation coefficient, those indices with larger ones are: gravel and sand particles (0.948), big pores and middle-small pores (0.846), quartz and feldspar (0.827), feldspar and clay minerals (0.747). If the soil structure factors are under considerations, the 9 indices are in sequence of weight ratio from large to small: micro-pores, feldspar, clay minerals, sandy particles, gravel, large pores, middle-small pores, silt and clay particles, quartz. These indices, quantified after their correlations and weight ratios, provide bases for the study of micro-features in detail and classifications of the CDG, and perhaps act as one of the basement for the constitution equations of microstructure mechanics of soils to be built.
Persistent Identifierhttp://hdl.handle.net/10722/70816
ISSN
2015 SCImago Journal Rankings: 0.843

 

DC FieldValueLanguage
dc.contributor.authorShang, YJen_HK
dc.contributor.authorWang, SJen_HK
dc.contributor.authorYue, ZQen_HK
dc.contributor.authorHu, RLen_HK
dc.contributor.authorTu, XBen_HK
dc.date.accessioned2010-09-06T06:26:22Z-
dc.date.available2010-09-06T06:26:22Z-
dc.date.issued2004en_HK
dc.identifier.citationYantu Lixue/Rock And Soil Mechanics, 2004, v. 25 n. 10, p. 1545-1550en_HK
dc.identifier.issn1000-7598en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70816-
dc.description.abstractThe three aspects with respect to micro-properties of the completely decomposed granite (CDG) as the distribution of pore radius, particle diameters and mineral content play a major role in determining the engineering geological features of the CDG. In theoretical study and engineering practice the following parameters are used to describe the characteristics in the three aspects: large, middle and small, micro-pores, gravel, sand, silt and clay particles, three major mineral components (quartz, feldspar and clay minerals), etc. How large of the variation range of these indices in one certain size of trial pits and blocks? How about the correlation of the indices in the three parts? As factors of soil structure, how large of their weight ratios once the soil structure is to be under considerations? In this paper, a total of 51 nos. specimens from 18 nos. blocks from three trial pits of two slopes in Kowloon, Hong Kong, were taken as examples. The test is carried out by means of the mercury injection, particle size distribution and X-ray diffraction. After preliminary analysis, it is found that the CDG with coarse particle portions is very different from that with fine particle portions. The former belongs to gravel soil and sandy gravel soil, and some of it is gravel-bearing soil, with more big pores, more quartz and clay minerals. The latter belongs to gravel-bearing soil, some is fine sandy soil and sub-sandy soil, with more micropores, more feldspars. Variations of feldspar and clay mineral contents are inverse to each other. Furthermore, the interaction matrix is applied for analysis of the correlation of the 9 indices. As a result, it is found that the correlation coefficient varies to a great extent. According to the value of the correlation coefficient, those indices with larger ones are: gravel and sand particles (0.948), big pores and middle-small pores (0.846), quartz and feldspar (0.827), feldspar and clay minerals (0.747). If the soil structure factors are under considerations, the 9 indices are in sequence of weight ratio from large to small: micro-pores, feldspar, clay minerals, sandy particles, gravel, large pores, middle-small pores, silt and clay particles, quartz. These indices, quantified after their correlations and weight ratios, provide bases for the study of micro-features in detail and classifications of the CDG, and perhaps act as one of the basement for the constitution equations of microstructure mechanics of soils to be built.en_HK
dc.languageengen_HK
dc.publisher中國科學院武漢巖土力學研究所. The Journal's web site is located at http://ytlx.chinajournal.net.cn/zh_HK
dc.relation.ispartofYantu Lixue/Rock and Soil Mechanicsen_HK
dc.subjectCompletely decomposed graniteen_HK
dc.subjectCorrelation coefficienten_HK
dc.subjectMicro-propertiesen_HK
dc.subjectMineral contenten_HK
dc.subjectParticle diameteren_HK
dc.subjectPore radiusen_HK
dc.titleVariation features of pore radius and particle diameter distributions and mineral content of completely decomposed granite and correlation of parametersen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1000-7598&volume=25&issue=10&spage=1545&epage=1550&date=2004&atitle=Variation+features+of+pore+radius+and+particle+diameter+distributions+and+mineral+content+of+completely+decomposed+granite+and+correlation+of+parametersen_HK
dc.identifier.emailYue, ZQ:yueqzq@hkucc.hku.hken_HK
dc.identifier.authorityYue, ZQ=rp00209en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-10344260658en_HK
dc.identifier.hkuros103004en_HK
dc.identifier.volume25en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1545en_HK
dc.identifier.epage1550en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridShang, YJ=7101867915en_HK
dc.identifier.scopusauthoridWang, SJ=7410335510en_HK
dc.identifier.scopusauthoridYue, ZQ=7102782735en_HK
dc.identifier.scopusauthoridHu, RL=7202640738en_HK
dc.identifier.scopusauthoridTu, XB=7102136710en_HK

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