Collected Item: “Determination of Mechanical Properties of Altered Dacite by Laboratory Methods”
Врста публикације
Рад у часопису
Верзија рада
објављена верзија
Језик рада
енглески
Аутор/и (Милан Марковић, Никола Николић)
Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović
Наслов рада (Наслов - поднаслов)
Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
Наслов часописа
Minerals
Издавач (Београд : Просвета)
MDPI AG
Година издавања
2021
Сажетак на енглеском језику
This paper presents a methodology for determining the uniaxial and triaxial compressive
strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual
transition from altered dacite to dacite was observed in the rock mass. The mechanical properties
of the rock material in that zone were determined by laboratory tests of composite samples that
consisted of rock material discs. However, the functional dependence on the strength parameter
alteration of the rock material (UCS, intact UCS of the rock material, and mi) with an increase in
the participation of “weaker” rock material was determined based on the test results of uniaxial
and triaxial compressive strength. The participation of altered dacite directly affects the mode and
mechanism of failure during testing. Uniaxial compressive strength (sci
UCS) and intact uniaxial
compressive strength (sci
TX) decrease exponentially with increased AD volumetric participation. The
critical ratio at which the uniaxial compressive strength of the composite sample equals the strength
of the uniform AD sample was at a percentage of 30% AD. Comparison of the obtained exponential
equation with practical suggestions shows a good correspondence. The suggested methodology for
determining heterogeneous rock mass strength parameters allows us to determine the influence of
rock material heterogeneity on the values sci
UCS, sci
TX, and constant mi. Obtained sci
TX and constant
mi dependences define more reliable rock material strength parameter values, which can be used,
along with rock mass classification systems, as a basis for assessing rock mass parameters. Therefore,
it is possible to predict the strength parameters of the heterogeneous rock mass at the transition of
hard (D) and weak rock (AD) based on all calculated strength parameters for different participation
of AD.
strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual
transition from altered dacite to dacite was observed in the rock mass. The mechanical properties
of the rock material in that zone were determined by laboratory tests of composite samples that
consisted of rock material discs. However, the functional dependence on the strength parameter
alteration of the rock material (UCS, intact UCS of the rock material, and mi) with an increase in
the participation of “weaker” rock material was determined based on the test results of uniaxial
and triaxial compressive strength. The participation of altered dacite directly affects the mode and
mechanism of failure during testing. Uniaxial compressive strength (sci
UCS) and intact uniaxial
compressive strength (sci
TX) decrease exponentially with increased AD volumetric participation. The
critical ratio at which the uniaxial compressive strength of the composite sample equals the strength
of the uniform AD sample was at a percentage of 30% AD. Comparison of the obtained exponential
equation with practical suggestions shows a good correspondence. The suggested methodology for
determining heterogeneous rock mass strength parameters allows us to determine the influence of
rock material heterogeneity on the values sci
UCS, sci
TX, and constant mi. Obtained sci
TX and constant
mi dependences define more reliable rock material strength parameter values, which can be used,
along with rock mass classification systems, as a basis for assessing rock mass parameters. Therefore,
it is possible to predict the strength parameters of the heterogeneous rock mass at the transition of
hard (D) and weak rock (AD) based on all calculated strength parameters for different participation
of AD.
Волумен/том или годиште часописа
11
Број часописа
8
DOI број
10.3390/min11080813
ISSN број часописа
2075-163X
Кључне речи на српском (одвојене знаком ", ")
Geology,Geotechnical Engineering and Engineering Geology
Кључне речи на енглеском (одвојене знаком ", ")
Geology,Geotechnical Engineering and Engineering Geology
Линк
https://www.mdpi.com/2075-163X/11/8/813/pdf
Шира категорија рада према правилнику МПНТ
M20
Ужа категорија рада према правилнику МПНТ
М22
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Отворени приступ
Лиценца
Creative Commons – Attribution 4.0 International
Формат дигиталног објекта
.pdf