The test results show that Kalgoorlie basalt rock exhibits high sensitivity to strain rate effect on its compressive strength especially above 100/s and dynamic increment factor up to 2.3 at ...
To determine the compressive strength (CS) and tensile strength (TS) of basalt fiber reinforced concrete (BFRC), this study will develop empirical models using gene …
The dynamic compressive strength of basalt fiber-reinforced concrete was bigger than that of ordinary concrete. ... L. Experimental Study of the Rock Mechanism under Coupled High Temperatures and Dynamic Loads. Adv. Civ. Eng. 2020, 2020, 1–19. [Google Scholar] An, H.; Hou, S.; Liu, L. Experimental and Numerical Study of the Concrete Stress ...
studies, the brittle strength of a rock or rock mass may be approximated by 0-1 = 0-3 4- /micro0- 3 4-S0- 2, (2) in which 0-1 and 0-3 are the greatest and least principal stresses at the initiation of fracture, 0-c is the unconfined compressive strength of intact basalt, and m i and s
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...
Dynamic compressive properties of Kalgoorlie basalt rock ... Dynamic compressive properties of Kalgoorlie basalt rock. Phil Dight. 2020, International Journal of Rock Mechanics and Mining Sciences. See Full PDF Download PDF. See Full PDF Download PDF. Related Papers.
The hardness of Basalt is 6 whereas its compressive strength is 37.40 N/mm 2. Streak is the color of rock when it is crushed or powdered. The streak of Basalt is white to grey whereas its fracture is conchoidal. Luster of Basalt is the interaction of light with the surface of Basalt. Luster of Basalt is not available. Basalt cleavage is not ...
The 7 days compressive strength is having almost 55% to 64% of 28 days compressive strength for this basalt fibre reinforced concrete. This observation is similarly seen in split tensile strength test also. (ii) The compressive strength is found to be maximum of 36.67 N/mm 2 for the concrete having 1% of basalt fibre content. The compressive ...
Uniaxial compressive strength (UCS) of rock is an essential parameter in geotechnical engineering. Point load strength (PLS), P-wave velocity, and Schmidt hammer rebound number (SH) are more easily obtained than UCS and are extensively applied for the indirect estimation of UCS. ... Andesite (1), Basalt (6), Deformed granite (4), Diabase (4 ...
The aim of this study is to understand the strength behaviour and fragment size of rocks during indirect, quasi-static and dynamic tensile tests. Four rocks with different lithological characteristics, namely: basalt, granite, sandstone, and marble were selected for this study. Brazilian disc experiments were performed over a range of strain rates from ~ 10–5 /s to 2.7 × …
Rock uniaxial compressive strength (UCS) is recognized as one of the influencing factors and is required in all the empirical relations, whereas pillar inclination is rarely considered. ... Basalt is a common igneous rock in hard rock mines (Van As and Jeffrey 2002). The basalt specimen has dimensions of 50 mm (in diameter) × 100 mm (in length ...
Basalt was used as an ornamental stone in any historic and ancient cities in Jordan. Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (Et) in the laboratory requires premium quality specimens with special core dimensions. This research focuses on correlations both UCS and Et with Leeb Rebound Hardness Test (LRH). …
Basalt is a type of igneous rock (volcanic magma hardens under the atmosphere), extrusive rock [21,22,23,24] and is usually originated in the East Asian countries. ... By an increment in the dosages of basalt fibre, the …
Assessing the uniaxial compressive strength and tangent Y oung's modulus of basalt rock using the Leeb rebound hardness test • 15 Materiales de Construcción 70 (340), October–December 2020 ...
Typical properties of Basalt rock are: • Density : 2630 +/- 140 kg/m3 (164 lb/ft3) • Compressive strength : ~144 - 292 MPa (20,885 –42,351 psi) Basalt rock can be 4-7 X stronger in compression than normal Portland cement concrete typically used on Earth. How can basalt rock be formed to be comparable to concrete as a construction material?
Compressive strength: 266±98 MPa ( source) Thermal conductivity: Poor, 1.672 Wm -1 K- 1 at 20°C to 200°C. pH: 7 to 9.5, varies with variety and composition ( source) Melting point: 984° to 1260° ( source) …
Compared with the compressive strength 250 MPa of basalt at 25℃, the compressive strength σ c after heat treatment at 200 ℃ and 400 ℃ increases by 10.50% and 15.85%, respectively. The main reason is that the expansion of mineral particles causes the gradual closure of primary fractures, which increases the compactness of rocks and thus ...
The compressive strength increases with basalt fiber content and curing time, and reaches the peak at the fiber content of 0.2%, followed by a reduction due to the formation of weak zone at higher ...
To determine the compressive strength (CS) and tensile strength (TS) of basalt fiber reinforced concrete (BFRC), this study will develop empirical models using gene expression programming (GEP ...
TO TENSILE STRENGTH AND COMPRESSIVE STRENGTH David Candra Birawidha1,2, ... selling price of basalt rock is lower than other reinforcing fillers, requiring a long and
ξ uniaxial compressive strength of the intact rock pieces, ξ value of the Hoek-Brown constant for these intact rock pieces, and ξ value of the Geological Strength Index GSI for the rock mass. ... Fresh basalt, chert, diabase, gneiss, granite, quartzite R5 ; Very: strong: 100 -250 4 -10 Specimen requires many blows of a geological :
To do this, we evaluated the physical (porosity, permeability) and mechanical (strength) properties of basaltic rocks at Pacaya Volcano (Guatemala) through a variety of laboratory experiments, including: room …
Knowing the rock type and rock material hardness, it is possible for the experienced engineer or engineering geologist to make fairly accurate estimates on rock material strength. These can be readily verified by uniaxial compressive strength or point load tests. A simple estimate can be made from the field test in Table 5.
Marble presents differences concerning its density, or porosity, though it presents a wide range of compressive strength. Basalt is used all over the world, and because of its volcanic origin, it is an abundant source of basalt rock. ... Shakoor A (1997) Evaluation of empirical methods for measuring the uniaxial compressive strength of rock ...
... seen in Table 1, ranges of basalt samples from 18 different locations are 2.71 -1.72 g/ cm 3 for density, 0.91 -12.95% for porosity, 145.15 -17.2 MPa for uniaxial compressive strength,...
Lopresto et al. [13] investigated and compared the compressive strength, Young's modulus and flexural behavior of basalt fiber reinforced plastics or polymers (BFRP) with glass fiber reinforced plastics ... These dumping pits are often deep and made of several layers of sand, gravel, coarse materials and basalt rock armor.
The average compressive strength of the control specimens and basalt fibre-reinforced concrete is shown in Fig. 8. An increase in compressive strength of BFRC1 was in the order of 20.85% and 26.80% as compared to control concrete at …
The rock hardness of basalt is 6 as per the Mohs scale and can be observed through a combination of its compressive strength. Generally, 100-300 Mpa or Megapascal is the compressive strength. Its tensile strength is10-30 Mpa, and its shear strength is 20-60 Mpa, which denotes that depending on the mineral makeup, basalt rocks fall in the ...
Uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS) of the rock material are important engineering parameters in designing of surface and underground structures in rocks.
Increasing the content of basalt fibers to a certain extent can enhance the compressive strength of RAC, but it also significantly increases the variability of material performance. Additionally, the minimum compressive strengths of these three sets of specimens are 19.3, 19.7, and 21.0 MPa, respectively, indicating that the influence of fiber ...
Bulk density, uniaxial compressive strength, modulus of elasticity, indirect tensile strength and water absorption were measured. The abrasion resistance was tested by micro-Deval tests. ... Engidasew TA, Barbieri G (2014) Geo-engineering evaluation of Termaber basalt rock mass for crushed stone aggregate and building stone from Central ...
Overall, axial compressive strength for Pacaya basalt ranges widely from 12 to 174 MPa (Table 3), with the lower end falling into strength categories as low as chalk ... On average, strength at 935°C was 19 and 5% higher than the rock strength at room temperature for deformation at strain rates of 10 −1 and 10 −5 s −1, respectively.
compressive strength (UCS) and tangent Young's modulus (E. t) are the main input parameters of the mechanical behavior of rock, especially in ascertain - ing rock shear strength, rock mass rating (RMR), classification, and earth structure design such as foundation and tunneling (1–6). Conducting a UCS test in the laboratory accord -
