Geotechnical characteristics of weathered granitic gneiss with geo-hazards investigation of pit excavation in Guangzhou, China

2016 ◽  
Vol 76 (2) ◽  
pp. 681-694 ◽  
Author(s):  
Mu Chen ◽  
Shui-Long Shen ◽  
Huai-Na Wu ◽  
Zhi-Feng Wang ◽  
Suksun Horpibulsuk
Keyword(s):  
Granitic Gneiss ◽  
Geotechnical Characteristics

Geotechnical characteristics of the Zabeli location, Gjilan

2017 ◽  
Author(s):  
Shemsi Mustafa ◽  
Misin Misini ◽  
Zenun Elezaj
Keyword(s):  
Geotechnical Characteristics

scholarly journals Provenance and tectonic significance of the Zhongwunongshan Group from the Zhongwunongshan Structural Belt in China: insights from zircon geochronology

2020 ◽  
Vol 12 (1) ◽  
pp. 25-43
Author(s):  
Yuan Peng ◽  
Yongsheng Zhang ◽  
Eenyuan Xing ◽  
Linlin Wang
Keyword(s):  
Detrital Zircon ◽  
Sedimentary Basin ◽  
Early Paleozoic ◽  
Granitic Gneiss ◽  
Metamorphic Belt ◽  
Early Devonian ◽  
Tectonic Environment ◽  
Tectonic Significance ◽  
North Qaidam ◽  
Back Arc

AbstractThe Zhongwunongshan Structural Belt (ZWSB) locates between the Olongbruk Microblock of North Qaidam and the South Qilian Block in China, and it has important implication for understanding the tectonic significance of North Qaidam. Nowadays, there are few discussion on the Caledonian tectonothermal events of the Zhongwunongshan Structural Belt, and there exist different opinions on provenance and tectonic environment of the Zhongwunongshan Group in the ZWSB and its adjacent North Qaidam. In this study, a comprehensive analysis of the detrital zircon geochronological research was carried out on the Zhongwunongshan Group. The detrital zircon U-Pb dating results showed two major populations. The first was Neoproterozoic (966-725 Ma) with a ∈Hf(t) = −15.9 to 9.5, and the other was late Early Paleozoic (460-434Ma) with a ∈Hf(t) = −9.6 to −3.1. In combination with previous research, the dominated provenances were found to be the Neoproterozoic granitic gneiss of the Yuqia-Shaliuhe HP-UHP metamorphic belt and the late Early Paleozoic granite of the Tanjianshan ophiolite-volcanic arc belt in North Qaidam. The Zhongwunongshan Group was deposited in the back-arc sedimentary basin related to the Caledonian collisional orogeny during Middle Silurian-Early Devonian (434-407.9 Ma).

scholarly journals Petrographic and Geotechnical Characteristics of Carbonate Aggregates from Poland and Their Correlation with the Design of Road Surface Structures

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2034
Author(s):  
Jerzy Trzciński ◽  
Emilia Wójcik ◽  
Mateusz Marszałek ◽  
Paweł Łukaszewski ◽  
Marek Krajewski ◽  
...  
Keyword(s):  
Road Surface ◽  
Surface Structures ◽  
Engineering Properties ◽  
Geological Engineering ◽  
Functional Relationships ◽  
Road Design ◽  
Geotechnical Characteristics ◽  
Design Calculations ◽  
Building Engineering ◽  
Design And Construction

The paper presents the basic problem related with practical application of carbonate rocks in construction: are carbonate aggregates produced from such rocks favorable for building engineering, particularly for road design and construction? To resolve this problem, (1) the geological-engineering properties of aggregates are presented, (2) the correlation between petrographic and engineering parameters is shown, and (3) a strict correlation between the geological-engineering properties and the freezing-thawing and crushing resistance is recognized. This knowledge has allowed to assess the usefulness of asphalt concrete (AC) made from dolomite and limestone aggregates in the design and construction of road surface structures. The petrography was characterized using optical microscopy and scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscope (EDS). Engineering properties were determined in accordance with European and Polish norms and guidelines. Statistical and design calculations were performed using dedicated software. The petrographic properties, and selected physical and mechanical parameters of the aggregates, were tested to show their influence on the freezing–thawing and crushing resistance. Strong functional relationships between the water adsorption, and the freezing–thawing and crushing resistance have been observed. Aggregate strength decreased after saturation with increasing concentrations of salt solutions. Calculations of AC fatigue durability and deformation allow for reducing the thickness of the road surface structure by about 20% in comparison to normative solutions. This conclusion has impact on the economy of road design and construction, and allows for a rational utilization of rock resources, which contributes to sustainable development of the construction industry.

Geotechnical characteristics of a Rubber Intermixed Ballast System

2021 ◽  
Author(s):  
Chathuri M. K. Arachchige ◽  
Buddhima Indraratna ◽  
Yujie Qi ◽  
Jayan S. Vinod ◽  
Cholachat Rujikiatkamjorn
Keyword(s):  
Geotechnical Characteristics

Identification of suitable nontraditional tropical and residual paving materials in relation to the environment

1987 ◽  
Vol 24 (1) ◽  
pp. 58-71 ◽  
Author(s):  
M. D. Gidigasu ◽  
S. P. K. Asante ◽  
E. Dougan
Keyword(s):  
Performance Studies ◽  
Low Cost ◽  
Index Properties ◽  
Moisture Index ◽  
Fines Content ◽  
Geotechnical Characteristics ◽  
Pavement Construction ◽  
The One ◽  
Identification And Characterization

Results of laboratory and field construction and pavement performance studies have revealed that some apparently substandard or borderline—by temperature zone standards—tropical gravel materials can be used successfully for the construction of low-cost pavements in subhumid climatic zones.The geotechnical characteristics of suitable paving materials have been defined from results of studies carried out on satisfactory and poor road sections over a period of 5–6 years.Important correlations were found between the bearing strength (CBR) on the one hand and some moisture index properties as well as the products of the fines content and these index properties on the other.It is shown that the product of the fines content and some moisture index properties form a useful basis for identifying suitable materials for pavement construction in the moist subhumid climatic zone of Ghana.The paper is a contribution to the identification and characterization of nontraditional tropical and residual paving materials in relation to the environment. Key words: pavements, California bearing ratio (CBR), index properties, fines content, subhumid climate.

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