نتایج جستجو برای: uniaxial compressive strength

تعداد نتایج: 226293  

In many rock engineering projects, accurate identification of rock strength properties is very important. Uniaxial compressive strength is one of the most important features to describe the resistive behavior of rocks which is used as an important parameter in the design of structures especially underground openings. Determination of this parameter using direct methods, including uniaxial compr...

Journal: :int. journal of mining & geo-engineering 2014
mohammad doustmohammadi ahmad jafari omid asghari

uniaxial compressive strength (ucs) is one of the most significant factors on the stability of underground excavation projects. most of the time, this factor can be obtained by exploratory boreholes evaluation. due to the large distance between exploratory boreholes in the majority of geotechnical projects, the application of geostatistical methods has increased as an estimator of rock mass pro...

Journal: :journal of ai and data mining 2016
m. heidarian h. jalalifar f. rafati

uniaxial compressive strength (ucs) and internal friction coefficient (µ) are the most important strength parameters of rock. they could be determined either by laboratory tests or from empirical correlations. the laboratory analysis sometimes is not possible for many reasons. on the other hand, due to changes in rock compositions and properties, none of the correlations could be applied as an ...

Journal: :journal of sciences, islamic republic of iran 2014
a. jamshidi

uniaxial compressive strength (ucs) and elastic properties of rocks play a major and vital role for the design of any engineering structure. the specimen diameter size is one of the main factors that influencing on ucs, elasticity modulus and poisson’s ratio (e and υ). here, an attempt has been made to investigate the effect of specimen diameter size on ucs, e and υ. moreover, we studied the co...

Journal: :تحقیقات مهندسی کشاورزی 0
علی ماشاءاله کرمانی استادیار پژوهش بخش تحقیقات فنی و مهندسی مرکز تحقیقات کشاورزی و منابع طبیعی قزوین تیمور توکلی هشتجین استاد دانشگاه تربیت مدرس سعید مینایی دانشیار دانشگاه تربیت مدرس

an understanding of the strength of rice grains as affected by moisture content and temperature is important for analysis and prediction of cracking and/or breakage behavior during handling and processing. further, the magnitude of these properties at various moisture contents and temperatures is needed for the accurate design of milling machinery so that grain damage is minimized. to determine...

Journal: :journal of mining and environment 2014
s. hadi hosseini mohammad ataie hamid aghababaie

in this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, uniaxial compressive strength, tensile strength (brazilian test), elastic modulus, schmidt hammer rebound number have been done on samples. in addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections...

Journal: :journal of mining and environment 2011
s. r. torabi m. ataei m. javanshir

a literature review revealed that most of the empirical equations introduced for determination of the uniaxial compressive strength (ucs) of rocks based on the schmidt hammer rebound number (n) are not sufficiently reliable mostly due to the relatively low coefficient of correlations. this is attributed to the fact that in most cases one formula is used for all types of rocks, although...

Journal: :geopersia 2014
mohamad hossein ghobadi reza babazadeh saeed khodabakhsh

due to their widespread availability, sandstones are commonly used as a natural stone for buildings, monuments and sculptures. in thecurrent study, nine sandstone samples from the upper red formation (specified by the letters a, b, c, cg, s, s1, sh, tr and min)were studied from a petrophysical point of view and their durability was evaluated. then, their suitability as building stones wasassess...

2018
Jung Hwan Hyun Bang Yeon Lee Yun Yong Kim

This paper presents the results of an experimental study on the effect of limestone powder on the compressive strength, tensile behavior, and micromechanical parameters of a highly ductile cement composite incorporating limestone powder. Four mixtures were determined according to the replacement ratio of cement with limestone powder. A series of experiments including compressive strength, uniax...

ژورنال: علوم آب و خاک 2022

Since clay is widely used in most construction projects, the issue of improving clay soils has considerable importance. This study aimed to optimize the variables affecting the properties of geopolymer and improve their mechanical properties using Isfahan blast furnace slag. Taguchi's statistical design method was used to model three process variables (blast furnace slag, water, and alkali sodi...

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