Mechanical characterization is important to the design and analysis of cemented paste backfill (CPB) structures. Unconfined compressive strength (UCS) tests have been widely used owing their relative simplicity characterize a material’s response unconfined loading. However, UCS represents single parameter does not fully describe (or failure) envelope. In this study, we analyzed with direct shea...

Rock strength, specifically the uniaxial compressive strength (UCS), is a critical parameter mostly used in effective and sustainable design of tunnels other engineering structures. This determined using direct indirect methods. The methods involve acquiring an NX core sample sophisticated laboratory procedures to determine UCS. However, are time-consuming, expensive, can yield uncertain result...

In order to assess mineralogical composition influence on durability and strength of rocks, four samples of hornfelsic rocks were selected from southern and western parts of the city of Hamedan, west of Iran. These rock samples were subjected to mineralogical, physical and mechanical tests in the laboratory. Also, they were evaluated in 15 cycles of slake-durability testing in different pH of s...

Uniaxial compressive and Brazilian tensile strengths (UCS and BTS) of rocks are considered important properties in the design of most the geotechnical projects that interact with rock such as slope stability and underground excavation. Measuring UCS and BTS using standard laboratory tests are time consuming, tedious and expensive. Moreover, it requires a large number of well-prepared rock cores...

Abstract Evaluating the subground properties during initial stage of a construction building is important in order to estimate suitability soil quality technical requirements bearing capacity, resistance stress, and strength. This study presented evaluation geotechnical intended for Max IV facility Lund University, performed fieldwork laboratory. The situ methods included drilling boreholes, co...

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 ...

In order to study the application of lime-fly ash loess in permafrost subgrade engineering, uniaxial compressive test, fast direct shearing test and permeability tests were carried out on lime-fly ash loess under different curing ages and freeze-thaw cycles. Uniaxial compressive strength of lime-fly ash loess increases slowly with the curing ages, and can reach 3.5 Mpa after the curing ages of ...

The effects of CO2-water-rock interactions on the mechanical properties of shale are essential for estimating the possibility of sequestrating CO2 in shale reservoirs. In this study, uniaxial compressive strength (UCS) tests together with an acoustic emission (AE) system and SEM and EDS analysis were performed to investigate the mechanical properties and microstructural changes of black shales ...

The effects of CO₂-water-rock interactions on the mechanical properties of shale are essential for estimating the possibility of sequestrating CO₂ in shale reservoirs. In this study, uniaxial compressive strength (UCS) tests together with an acoustic emission (AE) system and SEM and EDS analysis were performed to investigate the mechanical properties and microstructural changes of black shales ...

Abstract For low-carbon sustainability, recycled rubber particles (RPs) and aggregate (RA) could be used to make rubber-modified concrete (RRAC). The characteristics (compressive strength peak strain) of RRAC with various amounts RA RPs after heating at temperatures were studied in this work. results show that high significantly decreased the uniaxial compressive (UCS), whereas addition ( e.g. ...