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Key findings reveal that the point load index correlates linearly with uniaxial compressive strength (y = 10.97x, R²=0.93). These results not only enhance the …
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The findings of the study indicated that in the assessment of concrete's compressive strength after 28 days, the RF regression approach exhibited superior performance compared to the M5P model tree. Upadhya et al. [32] examined the efficacy of soft computing approaches in predicting the Marshall stability of glass fiber-reinforced concrete.
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* Test results mainly from "Handbook of physical properties of rocks and minerals" by R.S. Carmichael (1989); some test results also from Lama and Vutukuri (1978). ** mi is the factor …
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Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (E t) in the laboratory requires premium quality specimens with special core dimensions. This research focuses...
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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). In the laboratory, …
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between strain hardening and softening is called the unconfined compressive strength of the rock and is denoted as Co or qu. Failure takes place continuously from C to D during which ... Granite Basalt Gneiss Schist Quart-zite Marble Lime-stone Sand-stone Shale Av. Co Max. Co Min. Co Range No. of samples 181.7 324.0 48.8 275.2 26 214.1 358.6 ...
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[19] investigated the compressive strength of NaOH-activated basalt systems by varying the activator dosages and curing temperatures. They determined that a moderate compressive strength (about 16 MPa) can be realized and the compressive strength can be improved by increasing the curing temperature and duration.Moreover,they ...
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Volcanic rocks from the Bodrum Peninsula have been studied to establish a relationship between the uniaxial compressive strength (UCS), Young's modulus (E) and Schmidt hammer rebound number (N). Test results obtained on andesites, basalts and tuffs have been assessed statistically and the parameters obtained correlated. Regression equations were …
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The Haba Snow Mountain Tunnel experienced severe deformation caused by foliated metamorphic basalt. This rock has high metamorphism, easy weathering, and low strength. This study examines the rock ...
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This research presents a study of the compressive strength and porosity of mortar containing ground basalt (BS). Portland cement type 1 (OPC) was partially replaced at 0-40% of BS by weight of cementitious materials. Water to binder ratio (W/B) with constant of 0.43 was used. Superplasticizer (SP) was used to improve the workability of mortar.
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Brown criterion for estimating the strength and deformability of jointed rock masses, three 'properties' of the rock mass have to be estimated. These are: ξ uniaxial compressive strength …
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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 ...
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Introduction. Basalt fibers (BF) are produced from the basalt rocks which are formed because of volcanic lava solidification. BF are abundantly found on earth due to their volcanic origin 1, 2.BF have higher viscosity and resistivity of temperature shifts from low to high which ascribes higher Compressive Strength (CS) and durability 1.Micrograph Analysis show that BF have good …
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Typical values of strength parameters for intact basalt at ambient temperature (20°C) and negligible confining pressure are Young's modulus, 78±19 GPa; Poisson's ratio, 0.25±0.05; …
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Background: In this study, the unconfined compressive strength (qu) of a mixture consisting of clay reinforced with 24 mm-long basalt fiber was estimated using extreme learning machine (ELM).
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Explore a comprehensive list of basalt properties in both SI and US customary units at normal temperature and pressure (NTP).
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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).
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Uniaxial compressive strength ( ... Basalt 145 50 347 25 207 82 395 3 (17) Diabase, dolerite 229 88 384 13 152 81 537 5 15.2 Hyperite - - - - 245 108 441 2 ure Graywacke 81 25 310 12 - - - - Sandstone 109 28 257 95 147 28 189 5 18.8 Siltstone 89 31 350 14 - - - - 9.6 ...
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Keywords: Basalt, Regression analysis, Point load strength index, Uniaxial compressive strength Introduction Uniaxial compressive strength (UCS) is an important property of rock. Uniaxial ...
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A study of strength and deformation measurements for basaltic rocks, along with consideration of the influence of fracturing using a rock mass classification system, documents the range of brittle response for basaltic rock masses. Although basalts vary widely in composition and other physical factors, many of the properties of a basaltic rock mass appear to vary within a factor of about …
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From the results of the modal test, as shown in Table 7, and the compressive test, as presented in Table 4 and Figure 4, the compressive strength and dynamic MOE have shown a similar trend when the volume fraction of basalt fiber is increased continuously, with M 2 (0.25%) showing the highest compression and dynamic MOE value.
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In this study, the unconfined compressive strength (qu) of a mixture consisting of clay reinforced with 24 mm-long basalt fiber was estimated using extreme learning machine (ELM).
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The test results show that both the unconfined compressive strength (UCS) and splitting tensile strength (STS) at a given basalt fiber content increase significantly with increasing calcite content, whereas the axial strain of the peak …
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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.
WhatsApp: +86 18221755073
Due to melt of PVA fiber and C–S–H (main hydration product) decomposition, compressive strength of basalt/PVA HF-ECC exhibits over-all decreasing trend as temperature increases. The superimposed basalt fiber content could effectively increase compressive strength at elevated temperatures, because of the high-temperature stability basalt fiber.
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Additionally, incorporating steel fibres into ordinary concrete improves compressive strength, but the increase is limited to a maximum of 15 %. Concrete with steel fibres that have length-to-diameter ratios of 47 and 50 demonstrates superior compressive strength compared to those with a ratio of 80 [10].
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Abstract. To study the effects of basalt fibers (BFs), calcium sulfate whiskers (CSWs), and modified calcium sulfate whiskers (MCSWs) on the compressive strength and dynamic modulus of elasticity of concrete, this paper utilizes Mercury Intrusion Porosimetry (MIP) to measure the microstructure of concrete and calculate the fractal dimension of pore surface area.
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includes indirect tension, p- and s- wave velocity, density, unconfined compressive strength, confined compression, permeability during deformation, and natural tracer release during …
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In this study, the effects of fly ash (FA) and basalt fiber (BF) additives on the unconfined compressive strength (qu) of kaolin clay were experimentally investigated, and a dataset was created based on the results. This dataset was used in an artificial neural network (ANN) model to predict the qu based on the additive ratio, water content, and curing time. For …
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The maximum flexural strength was when 1.5% basalt fibers of 12 mm were added. The maximum compressive strength was 10.74 MPa for the specimen with 1.0% basalt fibers of 9 mm. Additionally, the thermal conductivity with increasing the basalt fiber dosage increased, decreased, and then again increased.
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