Mechanical properties and microstructure of basalt fibre …
Thus, the compressive strength decreases further at 400–600 °C. From Table 5, the trend of the relative residual compressive strength with temperature can be obtained, as shown in Fig. 5. It can be seen that the relative residual compressive strength generally decreases with an increase in temperature. Download : Download …
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(PDF) Assessing the uniaxial compressive …
Assessing the uniaxial compressive strength and tangent Y oung's modulus of basalt rock using the Leeb rebound hardness test • 9 Materiales de Construcción 70 (340), October–December 2020 ...
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Mechanical Properties and Damage Evolution Characteristics …
Basalt is an important part of the earth's oceanic crust and continental crust. It has many characteristics such as high compressive strength and wide distribution, and is a common rock type in rock mass engineering (Garcia-Ramonda et al. 2022; Silva et al. 2021; Wang et al. 2021a, b). In this study, basalt is taken as the research object.
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Unconfined Compression Test | Geoengineer
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 based on rock types . Based on their Uniaxial Compressive Strength, rocks can be characterized from very weak to very strong as ...
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Empirical models for compressive and tensile strength of basalt …
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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Mechanical performances and micro-level properties …
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%, …
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Estimating uniaxial compressive strength of rocks using …
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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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES
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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Empirical models for compressive and tensile …
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...
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Compressive strength prediction of basalt fiber …
Compressive strength. Triaxial compression test. 1. Introduction. Basalt fiber is a green non-polluting inorganic non-metallic material. Because of its strong tensile mechanical properties, it is widely used in fiber-reinforced concrete composite materials …
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Experimental study of compressive strength of basalt fiber …
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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Unconfined Compressive and Splitting Tensile Strength of Basalt …
The strength properties of basalt fiber–reinforced biocemented (BFRB) sand specimens with various calcite contents and fiber contents are investigated through a series of unconfined compressive and splitting tensile tests. Reverse injection is introduced to improve the uniformity of the calcium carbonate precipitation.
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(PDF) Compressive strength of lightweight expanded polystyrene basalt
In the result, expanded polystyrene concrete with density from 1,400 kg/m³ to 2,000 kg/m³ and compressive strength more than 20 MPa for structural application was made. View Show abstract
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Experimental Study on Unconfined Compressive …
ResearchArticle Experimental Study on Unconfined Compressive Strength of Basalt Fiber Reinforced Clay Soil LeiGao,GuohuiHu,NanXu,JunyiFu,ChaoXiang,andChenYang
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Assessing the uniaxial compressive strength and …
Assessing the uniaxial compressive strength and tangent Young's . modulus of basalt rock using the Leeb rebound hardness test. H. Aldeeky ... Assessing the uniaxial compressive strength and tangent Young's modulus of basalt rock using the Leeb rebound hardness test • 3 Materiales de Construcción 70 (340), …
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Design of basalt fiber reinforced concrete composite beams
And the compressive strength of basalt FRC cubes with volume fraction of 0.1, 0.2, 0.3 and 0.4% were 44.1, 44.5, 45.1 and 45.6 MPa, respectively. In addition, the mechanical properties of steel bars were obtained by testing three specimens for each type and are presented in Table 2, where f su is the ultimate tensile strength of steel bars.
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Estimation of compressive strength of various stones based …
This work examines the compressive strength of natural stones, as estimated by Uniaxial compressive strength tests (UCS) and respective non-destructive tests results (Schmidt Hammer Rebound test, SHR, or an Ultrasonic Pulse Velocity transmission, UPV). In practice, aiming to correlate the values of the UCS test with the …
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Compressive Strength
14.4.6 Compressive strength test. Compressive strength can be defined as the capacity of concrete to withstand loads before failure. Of the many tests applied to the concrete, the compressive strength test is the most important, as it gives an idea about the characteristics of the concrete.
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Compressive behavior of basalt FRP-confined circular and …
Sim and Park [13] observed that the strength of the basalt fiber was about 30% and 60% of the strength of the carbon and high strength glass (S-glass) fiber, respectively. The density of basalt fiber has been reported between 2.59 and 2.8 g/cm 3 ... After reaching their compressive strength at peak point, these specimens showed a …
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Studies on strength properties of basalt fibre reinforced …
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. The maximum split tensile strength is 5.48 N/mm 2 for 1% basalt fibre content.
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Experimental Study on Unconfined Compressive …
Advances in Materials Science and Engineering T : Physical-mechanical behaviors of basalt ber. Density/(g/cm 3) Elastic modulus/GPa Elongation at break/% Tensile strength/MPa Length/mm Filament diameter/ m T : Physical behaviors of clay soil.
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Relationships Between Unit Weight, Unconfined Compressive Strength…
ABSTRACT:. The presence of vesicles within basalt has a negative impact on both the unconfined compressive strength (UCS) and deformation modulus (axial stiffness) of basalt specimens. Vesicular basalt specimens (diameters of 44.45 mm) were cored from surface boulders obtained from southern Nevada. Each basalt boulder has …
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Compressive and Split Tensile Strength of Chopped Basalt …
In this study, the compressive and splitting tensile strength was studied after introducing chopped basalt fibers. In this research, 12 mm long and 13 μm in diameter basalt fibers were used as well as the cubes and cylinders have casted with basalt fiber reinforced concrete for 0.5 %, 1.0% and 1.5% of basalt fibers by the weight of cement ...
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Mechanical behaviour of basalt fibre reinforced concrete: An
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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Effects of microwave radiation on dynamic compressive properties of basalt
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 behavior of Basalt Fiber Reinforced Composite
The effect of volume fraction of basalt fibers on compressive strength, and the compressive stress-strain curve has been examined for ultimate strength up to 0.02% strain. The stress strain curve ...
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Compressive strength prediction of basalt fiber reinforced …
First, the compressive strength tests of BFRC under different stress states were performed at fiber volume fractions of 0.2%, 0.4%, 0.6% and fiber lengths of 6 mm, 12 mm and 18 mm to obtain stress ...
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The efficiency of statistical and artificial neural
Compressive strength testing was conducted for 3, 7, and 28 days. ... Going through a sample of the results in Fig. 4, the compressive strength of basalt fiber mixes showed some irregularities. Basalt fibers with 0.5% content gave comparable results to that of 0% basalt content, while all basalt ratios in M3 and M4 outperformed the …
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Numerical Study for Compressive Strength of Basalt …
in controlling the strength and stiffness of infilled frames. It was shown by Jung and Aref [3] that for equivalent diagonal strut model, diagonal stiffness and strength of the infill panels depend primarily on their dimensions, physical properties and length of contact with the surrounding structural frames.
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Experimental Study on Unconfined Compressive Strength of Basalt …
In order to study the mechanism and effect of basalt fiber reinforced clay soil, a series of unconfined compressive strength tests conducted on clay soil reinforced with basalt fiber have been performed under the condition of optimum water content and maximum dry density. Both the content and length of basalt fiber are considered in this paper. When …
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