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The H–B strength criterion is a nonlinear empirical relationship proposed by Hoek and Brown in 1980 based on the strength data of a large number of rocks [75, 76], whose expression is (16) σ 1 = σ 3 + σ c (m σ 3 σ c + s) n where σ c is the uniaxial compressive strength of the material, MPa; m is the parameter related to the material ...
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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 …
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The compressive strength of fly ash-based geopolymer matrix without basalt fibers added samples aged 28 days was 35 MPa which significantly increased 37% when the 10 wt.%. basalt fibers were added.
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After the sulfate erosion test, the compressive strength of OC and BFRC was obtained through the standard compressive strength test according to the Standard Test Method for Mechanical Properties of Ordinary Concrete (GB/T 50081–2021) [23]. A total of 160 specimens were tested by YAW-300 electro-hydraulic servo pressure test …
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It was found that the compressive strength of concrete with basalt fibers (1–4 percent) decreased in the range of ... [Show full abstract] 9.71–18.62 percent for M25. To predict the ...
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In the present work, dynamic stress-strain response of compact basalt is tested under high loading rates using 38 mm split Hopkinson pressure bar (SHPB) device. The physical and static mechanical properties of compact basalt, e.g., density, specific gravity, static compressive strength and elastic modulus values are also determined. …
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Effects of basalt fiber in lightweight expanded clay concrete on compressive strength and flexural strength of lightweight basalt fiber reinforced concrete; Influence of basalt fiber …
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In this study, the basalt rock extracted from the Kalgoorlie region of Western Australia is intensively studied on its compressive properties under both static and dynamic loads covering strain rate between 2.22 × 10-6 /s to 408/s. The ultimate compressive strength and corresponding failure strain are quantified. The test results show that …
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The average compressive strength σ c and elastic modulus E of basalt after different high temperature treatments are summarized in Fig. 7. To analyze the influence of temperature on strength and deformation characteristics, the parameter deterioration coefficient ({D}_{p}) is defined as Formula ( 1 ) with reference to the index …
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While the dynamic compressive strength of sandstone was reduced by 8% and 17% after being treated at 3 kW and 5 kW for 90 s, respectively [37]. Although a higher power level is used, the dynamic compressive strength of sandstone after microwave treatment is significantly lower than that of basalt.
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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%, whereby …
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DOI: 10.1016/j.mtcomm.2021.103117 Corpus ID: 245970494; Compressive strength prediction of basalt fiber reinforced concrete via random forest algorithm @article{Li2022CompressiveSP, title={Compressive strength prediction of basalt fiber reinforced concrete via random forest algorithm}, author={Hong Li and Jia‐Horng Lin and …
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In the static compressive test, the static compressive strength for both the ordinary concrete and the fiber-reinforced concrete decreased with the increase of the …
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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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The compressive strength of the mixes varied between 33.23 and 34.71 MPa. It has been noted from Fig. 4, the increase in fibre content in the mix caused to slight enhance in compressive strength up to 1.5% fibre volume, however at 2.0% fibre volume compressive strength was observed to be decreased. The reason may due to the …
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Test results indicated that hybrid fibers can effectively improve the compressive strength of concrete; that the maximum increases in compressive strength of C30, C40, and C50 concrete were 9.18%, 5.06%, and 7.13%, respectively; and that the effect of basalt fiber on compressive strength was greater than that of polypropylene …
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Fiber reinforced concrete as a kind of complex material of composite reinforced, which has received wide attention in the material field and engineering. In this experiment, the volume of basalt fiber were 0,0.1%, 0.15%, 0.20%, in this cases of, two kinds of different ways of curing fiber influenced axial compressive strength of basalt fiber recycled concrete …
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Download Citation | Compressive strength prediction of basalt fiber reinforced concrete via random forest algorithm | Basalt fiber is a green non-polluting material with strong tensile mechanical ...
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Generally, the improvement of fiber reinforced concrete from ordinary concrete includes flexural strength, spitting strength, compressive strength, elastic modulus, crack …
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The presence of non-connected vesicles in extensive basalt flows in western Saudi Arabia greatly affects their engineering properties such as compressive strength, modulus of elasticity, Poisson's ratio and sonic velocities. In order to evaluate some of these properties, the density and/or the porosity of the material must be known.
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Effect of Quartz Sand on Compressive Strength of High Performance Basalt Fiber Concrete. Yao Dongdong 1, Ji Hongru 2, Lu Zhe 2, Li Xinjun 2, ... The universal mechanical tester was applied to test the compressive strength of HPBFC specimens after different curing periods. Effects of the QS with different sizes and …
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The results illustrate that no-fiber columns sustain more than 50 % of the failure load before cracking, while this percentage raised to 75 % upon adding basalt fiber to concrete. 0.3 % of basalt ...
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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 …
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The compressive strength test was proceeded of different concrete test block. The block contained three strength grade C20, C25 and C30, two replacement ratio 50% and 70%, three fiber content 1.0 ...
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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 ...
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Analysis of compressive strength test results. 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, …
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Among them, compressive strength is the most important reference index in the mechanical properties of concrete, which significantly impacts the safe use of concrete. Therefore, the accurate and rapid prediction of the compressive strength of basalt fiber concrete (BFRC) has essential application value in practical engineering applications.
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This article presents the effects of basalt-polypropylene fibers on the compressive strength and chloride ion resistance of concrete with matrix strength grades C30, C40, and C50.
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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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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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The dynamic compressive strength of basalt fiber-reinforced concrete was bigger than that of ordinary concrete. The rapid development of modern society has increased the demand for high-performance geo-materials. As an advanced cementitious composite, fiber-reinforced concrete has attracted much attention and has been widely …
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In particular, the Uniaxial Compressive Strength is re-calculated as: σ c = σ UCS / (0.88 + 0.222*(D/L) ) Where σ c is the corrected uniaxial compressive strength. Rock characterization and typical range of UCS …
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The concrete without fiber showed the best compressive strength followed by the concrete with dispersed polypropylene fiber. ... • Hard chopped basalt fiber of diameter 1 milli meter = 42 grams ...
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28 days compressive strength of the HPBFC. As shown in figure 3, the compressive strength of specimen no. 1 is 97MPa, which is higher than that of the RS control group of 69.7MPa.
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Basalt is an extrusive igneous rock derived from Lava and spread over different localities in Jordan. It can be used in industrial applications, and as construction materials. Before using basalt, it is essential to determine its dry density, porosity, uniaxial compressive strength, and Brazilian tensile strength. The testing procedure and …
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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. …
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