This paper presents a review of the estimation of rock mass strength properties through the use of GSI. The GSI classification system greatly respects the geological constraints that occur in nature and are reflected in the geological information. A discussion is given regarding the ranges of the Geological Strength Index for typical rock masses with …
They observed the strength characteristics improve as a result of basalt fiber content. However, the addition of basalt fiber has caused non-linear variation in strength characteristics 5, 8, 9.
The ultimate bearing capacity is an important design consideration for dams, roads, bridges and other engineering structures, particularly when large rock masses are the foundation materials. With the exception of some very soft rocks and heavily jointed media, the majority of rock masses provide an excellent foundation material.
The Newer Volcanic basaltic clays, weathered from the Newer Volcanics basalt rock, are commonly found to the north and west of Melbourne. As the Newer Volcanic basalt flow was the predominant overlay rock in the Western and Northern suburbs, the weathered basaltic soil is at a prime depth for shallow foundations of light structures.
PDF | On Aug 23, 2022, S. Görtz and others published Reinforcement made of Basalt Fibre Reinforced Polymer (BFRP): Load-bearing capacity, durability and applications | Find, read and cite all the ...
Selecting the right grey for your exterior project can be a challenge as like whites, they all contain a different undertone.
The present study helps in understanding the different sample from different location of the basalt rock have varied values of safe bearing capacity, these samples tell us that we cannot consider ...
Tensile strength of rocks is an important parameter in the design of underground structures and for various engineering applications. Lack of literature and rapid development of infrastructure in central region of India calls for a need to characterize the mechanical behaviour of rocks in Deccan trap region which is mainly composed of Basalt.
The interconnection of vesicles in basaltic flows greatly affects the engineering properties such as uniaxial compressive strength, modulus of elasticity, Poisson's ratio, tensile strength and ...
Soil bearing capacity. Allowable bearing capacity: The maximum pressure that can be applied to the soil from the foundation so that the two requirements are satisfied: Ultimate bearing capacity: The minimum pressure that would cause the shear failure of the supporting soil immediately below and adjacent to the foundation.
Basalt fiber-reinforced concrete (BFRC) is relatively a new type of fiber-reinforced concrete, which has demonstrated good mechanical performance. Several types of fibers such as steel, glass, and carbon fibers, are used to improve the performance of plain concrete. However, basalt fibers (BF) are being considered superior to these …
The results show that increasing the surface tensile strength effectively increases the allowable buckling deformation or yielding range of rock, and the severity of rockburst reduces as the surface tensile strength increases.
Basalt rock is one of the most abundant components in the Earth's crust, and is commonly formed due to lava flow. In this article, we will take a look at the properties of this igneous rock, and the various ways in which it is …
Values of tensile and cohesive strength for the basaltic rock mass are approximately one to two orders of magnitude lower than corresponding values for intact basalt. Temperatures comparable to those at the Venus surface may slightly increase the deformation modulus but decrease the compressive strength of the rock mass.
Unit weight of rock γ [ kN/m3] Solid rock. most hard solid rock, intact, compact and dense quartz rock and basalt, other extraordinary hard rocks. 28.0 - 30.0. Highly hard rock. very hard granite rock, quartz porphyry, very hard granite, hard flinty shale, quartzite, very hard sand rock, and very hard calcite. 26.0 - 27.0.
This study reveals that discontinuity; the texture of rocks and weathering conditions affect the safe bearing capacity of basalt.
The green color is given by large amounts of copper and chlorite-bearing minerals settling throughout the region, but basalt remains a large component of many. In this fractured rock, it is sometimes possible to find gold.
The purpose of this case study is to introduce a new weathering classification system of rocks based on the engineering properties. Even though several authors have suggested different classification systems worldwide, limited research has been conducted to propose a classification system that includes more than two engineering properties. …
The highest compressive strength was obtained on a mixture of 40% basalt, 200 mesh, and a heating temperature of 80 °C for 6 hours, 56.32 MPa. The California Bearing Ratio (CBR) test showed a significant increase in the heat treatment geopolymer products.
Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, …
Basalt was used as an ornamental stone in many historic and ancient cities in Jordan. Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (E t) in the laboratory ...
The geological strength index (GSI) is a system of rock mass characterization that was developed, by Hoek (1994) and Hoek et al. (1995), to link the failure criterion to engineering geology observations in the eld. The most complete description of the fi current use of the GSI and the Hoek Brown criterion is given in a.
This study aims to examine the influence of pre-existing discontinuities on the strengths of four natural rocks of different origins. A series of unconfined compression tests was performed on specimens of two types of sandstones, argillite and basalt that contain open and filled cracks. It was found that the presence of cracks tends to decrease the …
The optimal results without decreasing the value of tensile strength and compressive strength were obtained from the use of basalt powder and the hardener content in the addition of 80% basalt ...
It has been shown that: For intact rock the ultimate bearing capacity is many times greater than the unconfined compressive strength (UCS) of the rock (see Tables 3 and 4 for example of theoretical calculations and field measurements).
To examine the shear strength of basalt fiber-reinforced (BFR) loess, consolidated undrained (CU) triaxial tests were conducted to explore the impacts of water content (w), fiber length (FL ...
Abstract. Conventional foundation bearing capacity calculation is based on Mohr-Coulomb linear failure criterion. But it is verified that almost all kinds of rock's strength envelope is nonlinear ...
Instead of dumping basalt fibers as trash, the empirical models can supply a precise and powerful foundation for enhancing their use in construction projects.
The bearing capacity is formulated in terms of rock mass rating, unconfined compressive strength of rock, ratio of joint spacing to foundation width, and angle of internal friction for the rock mass. Further, a conventional calculation procedure is proposed based on the fixed connection weights and bias factors of the best ANN structure.
Choob-basti et al.14 concluded that polyvinyl alcohol fiber can improved the shear strength and axial strain at failure of Babolsar sand, while decreased the strength loess after peak strength.
ABSTRACT:. The presence of vesicles within basalt has a negative impact on both the unconfined compressive strength (UCS) and deformation modulus (axial stiffness) of basalt specimens. Vesicular basalt specimens (diameters of 44.45 mm) were cored from surface boulders obtained from southern Nevada. Each basalt boulder has …
Basalt fiber (BF) originated from natural basalt rock and is a cost-effective and environmentally friendly material considering its tensile strength, elastic modulus, heat, and acid–alkali resistance.
Kimberlite is an igneous rock that major source of diamonds. Kimberlite is a variety of peridotite . It is rich in mica minerals content and often in form of crystals of phlogopite. Other containt …
To explore the mechanical properties and damage characteristics of basalt under high temperature and high pressure, triaxial compression tests are conducted on thermal damage rock samples, and the evolution process from progressive damage to macroscopic failure of rock is tracked and quantified by CT image reconstruction and …
Basalt, a volcanic rock formed From the rapid cooling of lava basaltic, represents one of the most common types of igneous rocks, found in many parts of the world. Its distinctive fine-grained texture and generally dark color, ranging from gray to black, characterize it. Composed mainly of minerals such as plagioclase feldspar, pyroxene and ...
Changes in the permeability of basalt before and after mineralization and microwave irradiation were simulated numerically, and their effects on the mechanical strength deterioration of basalt were analyzed according to …
Research on the dynamic tensile behaviour of microwave-irradiated rock is of great significance to microwave-assisted tunneling and mining. In order to study the effect of microwave heating and rapid cooling on the mechanical properties of basalt, dynamic Brazilian splitting tests were conducted using the split Hopkinson pressure bar (SHPB) …
Iron plays an important role in enhancing the tensile strength of basalt fibers (BFs); however, the origins of tensile-strength variation at high temperatures are not well understood. In this work, we prepared BFs with different iron reduction indices (IRI = Fe 2+ /Fe total) and explored the effects of high temperature and IRI on tensile strength.
PDF | On Jul 1, 2018, Y S Prabhakar and others published Prediction of Bearing Capacity of Highly Weathered Khondalytic Rocks | Find, read and cite all the research you need on ResearchGate
The relationship between the strength of sam-ples that can be tested in the laboratory and the strength of the rock mass is particularly important in determining design strength values for stability analysis. Rock mass is the term used to describe the material along the rupture surface. The rock mass may consist of a continuous fracture, a combina-tion of …
