STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES

In general, rock mass strength depends on the strength of intact rock and the strength of rock discontinuities. In general, compared to intact rock, a rock mass has reduced tensile strength …

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(PDF) Effects of basalt fibres on strength and permeability …

Essential variables in the stabilised soil matrix included basalt fibre length (3 mm, 6 mm, and 12 mm), RHA percentages (5%, 10%, and 15%), and cement percentage (3%). ... pressive strength of ...

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(PDF) Effects of Freeze–Thaw Cycles on Strength and

Clay Uniaxial compressive strength Gao et al., 2015 [26] ... pressive strength by using the friction force between the fiber and the soil. The interaction ... the strength of basalt.

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Development of basalt fiber engineered cementitious …

mid-1990 s [9,10], showing tensile strain capacity over 5%. Recently, owing to its high strength, PE fibers are especially popu-lar in developing ECC with tensile strength over 10 MPa and com-pressive strength over 100 MPa [11,12]. Contrary to the hydrophobic nature of PE fiber, polyvinyl alcohol (PVA) fiber is

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Structural Performance of Lightweight Aggregate …

in the case of compressive strength. However, the flexural strength of expanded clay LWC is higher compared with the concrete produced by normal weight aggregates [17]. It should be noted that the particle size of the used LWA has an important role in the strength parameters of a designed LWA concrete in the hardened state, as smaller ...

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Compressive Strength of Rocks

The following table provides a comprehensive list of compressive strength values for different rocks at standard room temperature (approximately 20°C or 68°F). Click on the icon to switch …

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Mechanical Properties of High-Strength Concrete …

pressive strength of the cube and cylinder have also been compared in terms of cylinder/cube strength ratios. Experimental results showed that PVA fibres rein- ... Table 1, both PVA and Basalt fibres possess good tensile strength and young modulus and these fibres have been added as 1, 2 and 3 % by volume of the overall

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Basalt 26 2339 3 S Pressive Strength

The strength was found to depend systematically on the relative amounts of Si, Al and Na, with the maximum being 64 ± 3 MPa for an Si∶Al∶Na molar ratio of 2.5∶1∶1.3. Details Prediction of …

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Effect of Quartz Sand on Compressive Strength of High Performance

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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Strength and deformation properties of granite, basalt, …

Results of the unconfined compressive strength tests on basalt indicated, that as the loading rate was increased from 1 to 1.60 y x 10. of elasticity increased. Total diametral strain decreased as …

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Test procedure

Uniaxial compressive strength (MPa)30. Young's modulus (GPa) Very low strength LowstrengthMedium strength High. Figure 3.8 Rock classification based on UCS and Young's modulus. (Adapted from Hawkes, I. and M. Mellor, Eng. Geol., 4, 179–285, 1970 and , D.U. and R.P. Miller, Engineering classification and index properties of intact rock.

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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 • 3 Materiales de Construcción 70 (340), October–December 2020, e230.

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Strength and Deformability of Fiber Reinforced …

30 26.9 25.7 24. 72.4. 47.8. 41.5. 37.2 ... pressive strength is reduced accor dingly with rising the water-cement ... (9.275 kg/m 3) basalt fiber content for both 12mm and 24mm length of basalt ...

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The dynamic strength and fracture properties of dresser basalt

The constants S C (0), S T (0) and S BC (0) are suitably determined strength values at zero absolute temperature and β and A are constants involving the activation energy, …

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The dynamic strength and fracture properties of dresser basalt

The unconfined com- pressive strength was found to vary from 41,000 psi to 125,000 psi over the range in temperature and strain rate used in this study, with the higher strengths being obtained at low temperatures and high strain rates. ... 1"9 x 10-4 0 300 2498 24 1'9 x 10-4 0 300 2498 26 2'4 x 10-I 0 300 1567 38 1"9 x 10-4 0 500 4163 39 1"9 x ...

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Modeling strength characteristics of basalt fiber reinforced …

This study investigated the importance of applying explainable artificial intelligence (XAI) on different machine learning (ML) models developed to predict the strength characteristics of basalt ...

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Basalt FRPs for strengthening of RC members

The basalt fiber used in this study was manufactured in Russia and exhibited the tensile strength of 1000 MPa, which was about 30% of the carbon and 60% of the high strength glass (S-glass) fiber.

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The single and hybrid use of steel and basalt fibers on …

and high tensile strength fibers are used to control large cracks, while short and low tensile strength fibers are used to prevent crack initiation and propagation in the matrix.

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Assesment of Alkali Resistance of Basalt Used as Concrete Aggregates

The development of the com pressive strength with age of basalt-bas ed concrete (BBC) ... 26. Unauthenticated. Download Date | 1/10/16 5:44 AM ... The compressive strength of basalt sand mortar ...

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Strength and ductility of reinforced concrete using basalt …

The partial replacement of CA was carried out in five proportions, that is, 0%, 10%, 20%, 30% and 40%, and every sample was analysed to determine the slump cone, the compressive strength, flexural ...

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Strength and deformation properties of granite, basalt, …

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 …

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Study on basalt rock fiber reinforced concrete with Manufactured sand

A total of 30 cubes of size 0.15 x 0.15 x 0.15 meters and 30 cylinders of size 0.15 x 0.15 x 0.3 meters were casted respectively to check the compressive strength and tensile strength of the ...

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Experimental study on the effect of basalt fiber reinforced …

In the first step, basalt fiber powder was adhered to polystyrene ball expanded polystyrene spheres (EPSs) by the "ball rolling method" to obtain basalt fiber reinforced epoxy composite ...

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The Prediction of Compressive Strength and …

26 Yaroslavskoye Highway, 129337 Moscow, Russia ... strength and compressive stress–strain curve of Basalt Fiber High-Performance Concrete (BFHPC), ... [1–3]. The effect of basalt fiber

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Forecasting compressive strength of concrete with basalt …

In this paper, an extensive simulation program is conducted to find out the optimal ANN model to predict the shear strength of fiber-reinforced polymer (FRP) concrete beams containing both ...

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Using non-destructive tests for estimating uniaxial …

Prediction of elastic mechanical properties such as uniaxial compressive strength (UCS) and static Young's modulus (E s) is one of the main purposes of studies in geological, geotechnical, geophysical, petroleum, and rock engineering projects. The UCS test is applied to determine them. However, this test is destructive, expensive, time-consuming, and requires …

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Influence of Addition of Micro Silica on Strength Properties of Basalt …

concrete was 26.69 N/mm2, ... It can be observed from Fig-2 that the com pressive strength of . ... The basalt fibres of 3, 6, 12 and 24 mm in length are incorporated into the SCC mixtures as 0% ...

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(PDF) Assessing the uniaxial compressive strength and …

Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (E t) in the laboratory requires premium quality specimens with special core …

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