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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 ...
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In this study, we used three tree-based ML models (Decision tree, Gradient Boosting tree, and Light Gradient Boosting Machine) to predict the mechanical strength …
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Effect of Quartz Sand on Compressive Strength of High Performance Basalt Fiber Concrete. ... Effects of the QS with different sizes and mixing ratios on compressive strength of the HPBFC were compared and the development of compressive strength of the HPBFC during different curing time was analysed. Results show that the QS with …
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Compressive strength prediction of Basalt Fiber Reinforced Concrete (BFRC), an advanced building material that combines performance and sustainability, is a complex task influenced by many factors. In this study, the compressive strength of BFRC is predicted using four tuned machine learning models, namely, Support Vector Machine (SVR), …
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The compressive strength of basalt fibre concrete depends on quantity of fibres and dispersion f fibers. Download: Download high-res image (71KB) Download: Download full-size image; Fig. 4. Compressive strength of basalt FRC. Download: Download high-res image (104KB) Download: Download full-size image; Fig. 5. Failure …
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In this paper, the strength prediction model of basalt fiber concrete is constructed by random forest method based on experiments to study the strengthening …
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As the basalt fiber content increases, the static compressive strength of basalt fiber-reinforced coral sand cement-based composite materials initially increases and then decreases. The static compressive strength reaches a peak of 64.13 MPa at a basalt fiber content of 0.4%. This represents a 28.78% increase compared to ordinary coral …
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In this research, the authors have developed an algorithm for predicting the compressive strength and compressive stress–strain curve of Basalt Fiber High-Performance Concrete (BFHPC), which is enhanced by a classical programming algorithm and Logistic Map. For this purpose, different percentages of basalt fiber from 0.6 to 1.8 …
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Porosity is a significant physical feature of rocks due to water absorption that causes decrease in the strength. The basalt of the study area can be described as "highly porous" and ignimbrite as "extremely porous" according to the classification by Anon (1979).The average UCS of basalt is determined as 26.65 MPa.For the ignimbrite, the …
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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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The results indicate that concrete's toughness and crack resistance performance are significantly improved with added fiber in basalt fiber reinforced …
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From the analysis results, it can be found that the effect of basalt fiber on the compressive strength of RPC is limited, and the high content of basalt fiber even reduces the strength of RPC obviously. This is because the basalt fiber mainly improves the tensile stress and crack resistance of concrete, solves the fragile tensile response of ...
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Basalt fiber reinforced concrete (BFRC) has attracted great attention in the areas of both scientific research and engineering application, ... Fig. 10 illustrates the compressive strength of OC is generally improved after a period of soaking no matter in 1% or 10% solution, until a peak strength is reached after the erosion age of 120 d ...
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Basalt fiber reinforced concrete (BFRC) has attracted great attention in the areas of both scientific research and engineering application, due to its high strength and stability, corrosion resistance, high temperature resistance and other properties and its advantages in durability [9], [10]. ... Additionally, the changes in compressive ...
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It may be seen from Table 2 that the dynamic compressive strength of compact basalt is 4.14 to 7.52 times that of the static compressive strength for strain rates varying from 41.31/s to 475.59/s. The correlation equation for compact basalt with a coefficient of determination ( R 2 ) = 0.84 is presented in Figure 4 and given by
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The increase in compressive, splitting tensile and flexural strength is in the order of 26.79, 42.71 and 44.06%, respectively, for 0.50% dosage of basalt fibre as compared to control concrete. In addition, basalt fibre is found to be amorphous and hydrophilic in nature.
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The dynamic compressive strength factor for the granite was less than 1; for the basalt, 1.35; for the limestone, 1.52; and for the tuff, 1.7^-« The compressional wave velocity of
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The addition of basalt fiber (BF) has a negative effect on concrete workability i.e., the slump decreases. 2. Basalt fibers have a minor effect on concrete compressive strength, where some studies reported an enhancement in compressive strength at a dose of 0.3% at most of the lengths while others reported a decrease in it. 3.
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where f c0 is compressive strength of the plain concrete; l is the length of basalt fiber; d is diameter of basalt fiber; λ 1 is the influence coefficient of compressive strength related to fiber dispersion and pouring process, as shown in Figure 10, λ 11 = 0.025, λ 12 = −0.006.
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High-performance composites based on basalt fibers are becoming increasingly available. However, in comparison to traditional composites containing glass or carbon fibers, their mechanical properties are currently less well known. In particular, this is the case for laminates consisting of unidirectional plies of continuous basalt fibers in an …
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Basalt fiber is a promising reinforcement agent for loess engineering. In this study, unconfined compressive tests facilitated with the digital image correlation (3D-DIC) method were carried out on basalt fiber–reinforced loess to obtain the deformation images and surface strain fields at different loading moments. The reinforcement mechanism of …
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Compressive test results showed basalt fiber could increase compressive strength at elevated temperatures. The optimal basalt fiber volume fraction was 0.8%, …
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The uniaxial compressive strength (UCS) is a mechanical property of intact rocks that is important in civil and mining engineering works (Aladejare 2020; Aladejare et al. 2020; Wang and Aladejare 2016a).Design and stability analysis of underground excavations and other geotechnical structures require the input of data like UCS on the …
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The flexural behavior of basalt fiber (BF)/polypropylene fiber (PF)-reinforced concrete (BPRC) was investigated. When the content of BF and PF is 0.1%, the addition of fibers increases the compressive strength of concrete. A BF content of 0.1% has the most obvious effect on improving the compressive strength, but a hybrid fiber content of …
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The 15 wt% basalt fibers added to geopolymer composites aged 7 days has shown the highest compressive strength at 47 MPa with the Ca/Si ratio=1.3 (Fig. 10), whereas the 10 wt% basalt fibers added to geopolymer composites at 28 days aged has shown the highest compressive strength of 48 MPa with the Ca/Si ratio=0.97 (Fig.11). It …
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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 …
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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 …
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Several of these properties (like tensile and compressive properties of basalt) are better than the fibers of E-glass and are also far cheaper than their carbon counterparts [20], [21], [22]. Hence, basalt fibers have received increasing attention as a novel type of reinforcement material for the fabrication of hybrid composites/laminates.
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When two layers of BF-R-EMS with a diameter of 8–9 mm are added to the concrete and 12 mm basalt fibers with a content of 2% are added to the matrix, the maximum compressive strength was increased by 7.9% compared to the unadulterated basalt fibers, and the maximum compressive strength was increased by 443% …
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Table 6 shows the test results of 28d compressive strength of basalt fiber permeable concrete. The results show that with the addition of basalt fiber, the compressive strength increases in different degrees.There is a positive correlation between fiber length and compressive strength, mainly because with the increase of …
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The splitting tensile strength has a linear relationship with the compressive strength. Abstract. In this study, basalt fibre and nano-silica were used to reinforce recycled concrete, to enhance the elevated temperature performance of the recycled concrete and expand its application space. The mechanical properties and microstructures at 25 ...
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Basalt fiber is a new type of green inorganic fiber with good chemical stability, high compressive strength, corrosion resistance, and high modulus of elasticity. …
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Basalt fibers have a minor effect on concrete compressive strength, where some studies reported an enhancement in compressive strength at a dose of 0.3% at …
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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 strength of this mix designation is increased upto 11.45% than the conventional concrete. (iii) The maximum split tensile strength is 5.48 N/mm 2 for 1% basalt fibre content. The split tensile …
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Trans. Nonferrous Met. Soc. China 32(2022) 3388âˆ'3403 Effects of microwave radiation on dynamic compressive properties of basalt Tu-bing YIN, Fei-yan JIN, Qiang LI, Xi-bing LI School of Resources and Safety Engineering, Central South University, Changsha 410083, China Received 15 July 2021; accepted 29 December …
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determine the uniaxial compressive strength . and the Hoek-Brown constant as described by Hoek and Brown (1980a). In this analysis, equation (5) is re-written in the form: (6) where . and . For n. specimens the uniaxial compressive strength, the constant and the coefficient of determination are calculated from: (7) (8) (9)
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