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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axial compressive strength. Several techniques have been proposed including the loop test10, the recoil test11-13, the micro-compression test14-17, compression test of a single-fibre composite9,18 and estimation Compressive Property of Basalt Fiber in Composite with Nano-indentation Lili Tong1, a, Limin Zhou 2,b, and Zhenqing Wang1,c
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It is evident that from the comparison of CFJ2B3 and CFJ2B2, the CFJ2B3 is showing only a marginal increase of 7.3 % with respect to CFJ2B2 in compressive strength by introducing an additional basalt layer. Thus, from an economical and performance perspective, CFJ2B2 wrapping was selected as the optimum for further analysis.
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It was found that the addition of basalt fibre by 1.5% and alcofine by 20% in concrete resulted in an increase in compressive strength of 8.9% for 7 days and 4.9% for 28 …
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The influence of fly ash content on the compressive strength was relatively small, and the 28 d compressive strength of basalt fiber self-compacting high-strength concrete slowly increased with the addition of the fly ash content. From Table 15, it can be seen that the main and secondary order of factors affecting the 28 d compressive strength ...
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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 Kalgoorlie basalt rock …
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The dynamic compressive strength factor for the granite was less than l; for the basalt, 1.35; for the limestone, 1.52; and for the tuff, 1.74. The compressional wave velocity of rock is affected by increases in both the applied axial stress and confining pressure.
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The results indicate that adding 1.0% basalt fiber significantly improves the dynamic compressive strength of RPC. At strain rate range of 100.5–118.5 s −1, the transmission energy and dissipated energy of RPC with 1.0% basalt fiber content increase by 59.2% and 26.8%, respectively, compared to RPC without fiber content.
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Peak shear stress, peak shear strain, and initial shear modulus can be improved by increasing the compressive stress ratio and adding basalt fibres. The above compression-shear properties are positively correlated with the compressive stress ratio and tend to increase and then decrease with the increase of basalt fibre content, and the optimum ...
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The properties of basalt fibers in different environments and their impact on concrete were examined. Basalt fibers have lower durability in alkaline environments compared to carbon fibers and can lose up to 80 % of their volume [9].Autoclaved environments have a negligible effect on the compressive strength of basalt fibers [9].The elastic modulus in …
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basalt and gravel gave similar compressive strength while the concrete containing limestone attained higher strength. The effects of content and particle size distribution of coarse
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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 of prepared buoyancy material can meet the pressure resistance requirements for operations in waters of a certain depth. ... basalt fi ber; compressive strength; epoxy ...
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The compressive strength of concrete with a 12 mm basalt fiber (BF) (1.5%) admixture is 9.08 MPa, which is 62.43% higher than that of concrete without the fiber admixture. The compressive strength was increased by 27.53 and 21.88% compared to concrete containing 3 mm BF (1.5%) and 0.5% BF (12 mm), respectively.
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The effect of fiber volume fraction for specimens with a design compressive strength of 30 MPa, and basalt fiber length of 12 mm and 24 mm is presented in Figure 6(a). From this figure, one can observe that the 7-day compressive strength of BFRC specimens made with 12 mm and 24 mm long fibers and with all fiber volume fraction values used in ...
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The ultimate compressive strength of the RC composite bars with a height-to-diameter ratio of 16 is lower than that of the PC composite bars because, in the compression process, the former experiences global buckling failure, and the lateral bending of the composite bars leads to a rapid loss of bearing capacity. ... Deterioration of basalt ...
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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 ...
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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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ABSTRACT. ABSTRACT: Understanding and predicting the intact strength of rock is very important in design of foundations, tunnels, and in other engineering projects. The presence of vesicles within basalt has a direct impact on the unconfined compressive strength (UCS) of the intact rock. Over 130 basalt samples from foundation projects for a large liquid …
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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.
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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 ...
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This research presents novel hybrid machine learning models for predicting the compressive strength (CS) and tensile strength (TS) of basalt fibre reinforced concrete …
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This paper introduced the experimental results on the compressive strength and the sulfate erosion depth of both ordinary concrete and basalt fiber reinforced concrete, based …
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The experimental test results of compressive strength and split tensile strength are showing on the table 3 against various volume fractions of basalt fibres such as 0%, 0.5%, 1%, 1.5%, 2%, 2.5% and 3% against the age of curing 7 days and 28 days. Fig. 5 shows, the 7 days compressive strength is having almost 55% to 64% of 28 days compressive strength for the …
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In this research, basalt fiber (BF) and polyacrylonitrile fiber (PANF) were used as reinforcement materials in LWACs, and the axial compressive behavior of prismatic specimens subjected to freeze-thaw cycles was studied. ... The axial compressive strength test was conducted in accordance with the requirements of the Chinese Standard (GB/T 50081 ...
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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 concrete, and the optimum fiber content is …
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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 ...
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Specifically, After being treated at 2 and 4 kW for 90 s, the dynamic compressive strength of basalt decreased by 16% and 20%, respectively. 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 ...
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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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Compressive test results showed basalt fiber could increase compressive strength at elevated temperatures. The optimal basalt fiber volume fraction was 0.8%, whereby compressive strength was higher than that of control PVA-ECC by 62.05%, 55.45% and …
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