Dong et al. [18] found that the density, compressive strength, and modulus of elasticity of heavy magnetite concrete increased with decreasing w/c ratio, Ouda [12] determined that heavy magnetite ...
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Başyiğit et al. [25] documented that artificial neural networks can be used for prediction of compressive strength of barite concrete shields having various barite fraction and w/c ratio. To estimate the mechanical properties of concrete shields after exposure to elevated temperatures, a fuzzy logic model has been recently developed by …
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Based on similar model testing of lining concrete materials, Zhao 16 used Plaster, white cement, barite powder, ... and the compressive strength range is 4.213–16.622 MPa. It can be seen from ...
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This is explained by the fact that the mass loss over this range of temperature was mainly due to the decarbonation of calcium carbonate of the hydrated cement paste. ... Residual compressive strength of barite concretes containing TFG. 100 BC R ela tiv e resid u a l co m p ressiv e stren g th (% ) 90 80 TFG-25 TFG-50 70 TFG-75 TFG-100 60 50 40 ...
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It shows that the density of the prepared similar materials varies from 1.82 to 2.08 g/cm 3, the range of uniaxial compressive strength is between 8.28 and 18.19 MPa, and the tensile strength falls between 1.01 and 4.00 MPa. It is also observed that the elastic modulus changes from 1.01 to 2.38 GPa, and Poisson's ratio ranges from 0.20 …
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DOI: 10.1016/J.IJENGSCI.2019.06.004 Corpus ID: 197503450; Improving compressive strength of high modulus carbon-fiber reinforced polymeric composites through fiber hybridization
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The lowest was obtained from P15 samples, and the highest from BA15. Hardened unit weight values range between 2.14 and 2.21 g/cm 3 for 7 days, 2.15–2.23 g/cm 3 for 28 days, ... they showed better resistance to maintain a better compressive strength. Barite-containing samples were found to be the most affected by high …
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Compressive strength achieved by concrete at 7 days is about 65% and at 14 days is about 90% of the target strength. Which test is most suitable for concrete strength? A concrete cube test or concrete cylinder test is generally carried out to assess the strength of concrete after 7 days, 14 days or 28 days of casting.
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The results also indicated that the maximum value of the compressive strength is 382.01 kg/cm2 for the concrete specimen with 50% barite aggregate and 10% bismuth powder. High-performance concrete including barite aggregate and bismuth powder increased shielding properties of concrete against gamma-rays.
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Barite (BaSO 4) is a mineral commonly used as aggregates to produce heavyweight concrete. The applications concern radiations shielding in hospitals and nuclear facilities. ... The coarse aggregates were crushed limestone aggregates 4/12 size range from the Djebel. Compressive strength. The compressive strength was …
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Barite is a heavy mineral, having specific gravity in range of 3.5 to 4.5, and is abundantly available in different parts of Pakistan. ... Keywords: Normal concrete; barite concrete; compressive ...
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Barite is a mineral composed of barium sulfate (BaSO 4). It receives its name from the Greek word "barys" which means "heavy." This name is in response to barite's high specific gravity of 4.5, which is exceptional for a nonmetallic mineral. ... The high specific gravity of barite makes it suitable for a wide range of industrial, medical, and ...
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The final diagram was within the standard range, which means that the aggregates were well graded. Moreover, the nominal maximum size of coarse aggregates was 20 mm. ... Upon replacement of barite …
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All the nuclear shielding parameters revealed the uppermost values for cement mixed with 5% barite of size range 250–600 µm. The attenuation coefficient of the investigated samples displayed an increase by more than 125% than that of neat cement. ... compressive strength; cement; barite Highlights • Blendings of Portland cement and …
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The majority of current studies focusing on rock-like materials employ barite powder [7][8][9], sand [9][10][11][12], and iron powder [9,11] as primary aggregates.
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Basalt and pumice-containing concretes show higher residual compressive strength. • Barite powder utilization decreased the residual parameters. ... The lowest was obtained from P15 samples, and the highest from BA15. Hardened unit weight values range between 2.14 and 2.21 g/cm 3 for 7 days, 2.15–2.23 g/cm 3 for 28 days, ...
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Effect of Compressive Strength on γ-Radiation Attenuation Coefficients for High Performance Concrete ... they are close to X-ray mass attenuation coefficient values of NIST [22]. The mass attenuation coefficient value of the barite concrete (BR-W30-S10) is 0.0746 cm2/g at 0.663 MeV γ-ray energy and the value of NIST is 0.0825 at 0.600 MeV ...
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The mixtures containing aggregates of cut iron and barite exhibit compressive strengths in the range of 500 to 550 kg/cm 2. The compressive strength of the concrete specimens without cut iron or barite is lower than 500 kg/cm 2. Thus, the additive material improves the compressive strength of the concrete specimens.
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The compressive strength and attenuation of gamma rays in heavy weight HPCs have a near to linear relation. On the other hand, it was also found that the compressive strength of the normal concrete has almost no effect on the attenuation of gamma rays. ... 0.6 produces a normal concrete having lower strength range (30-35) and that may or may ...
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Section snippets Materials. The cement used is ordinary Portland cement with a 28-day compressive strength over 42.5 MPa and a specific surface area of 379 m 2 /Kg, provided by Jinshan (Hunan) Cement Co. Ltd. The aggregates used are composed of barites with particle size range of 0–16 mm, and their grading curves are shown in Fig. 1.
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The maximum value obtained was 3507 kg/m 3, for B type's concrete for a w/c ratio of 0.5. In case of compressive strength, even though the ratio of 0.43 gave …
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Fig.2 Graph showing compressive strength of Concrete for Normal concrete 5.2 Effect of variation of Barites on compressive strength The compressive strength of concrete …
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The compressive strength is not a predominant factor because of the thickness of the radiation shields and the use of high-quality concrete in the mixtures. ... Barite aggregates obtained from the Konya–Beyşehir–Höyük region were used in this study. ... The density of the developed high-strength concrete (HSC) mixes ranges …
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In contrast, barite concrete (BC) has a density ranging from 3.07 g/cm 3 to 3.55 g/cm 3, with compression strength ranging from 18.15 MPa to 39.71 MPa. …
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Barite is a heavy mineral, having specific gravity in range of 3.5 to 4.5, and is abundantly ... Keywords: Normal concrete; barite concrete; compressive strength; tensile strength; elastic ...
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These additives play a crucial role in improving the performance of the cement and adapting it for a range of wellbore conditions. Barite is included to raise the density of the cement slurry, allowing its application in formations characterized by high pressure and high temperature. ... The higher the compressive strength, the more …
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Barite UHPCs showed the lowest compression strength due to a lesser percentage of Si and Fe elements. However, all UHPCs samples achieved high …
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However, the compressive strength of the composites improved steadily with the addition of the barite particulates. Sample G possessed the best compressive strength value of 127.97 MPa which is more than twice the compressive strength value of sample A (53.238 MPa) without barite filler.
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study was carried out and the effect on compressive strength characteristics (0%, 10%, 20%, 30%) was studied. pro Figure 1. Compressive strength with barite ratio changing …
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6.1 Compressive Strength ―Compressive strength levels commonly required by the construction industry for design strengths of cast-in-place, precast, or prestressed concrete are economically obtained with lightweight concrete (Shideler 1957; Hanson 1964; Holm 1980a). Design strengths of 3,000 to 5,000 psi (21 to 35 MPa) are
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