Effect of using heavy aggregates on the high performance concrete used in nuclear facilities

Gharieb, Mahmoud; Mosleh, Youssef A.; Alwetaishi, Mamdooh; Hussein, Enas E.; Sultan, Mohamed E.

doi:10.1016/j.conbuildmat.2021.125111

Cited by 14 publications

(3 citation statements)

References 25 publications

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“…However, Mehmetoğulları et al [ 31 ] showed that the strength of cement-based composites with well-graded fine aggregate increased as the grain size increased. Gharieb et al [ 22 ] showed that the presence of fine magnetite aggregate increased the 7-day, 28-day and 90-day compressive strengths by 23%, 12% and 9%, respectively, compared with magnetite concrete containing local fine sand.…”

Section: Discussion and Summarymentioning

confidence: 99%

“…It contains more sand, which can affect its porosity. Gharieb et al [ 22 ] revealed in their research that the fine magnetite aggregate absorbed more water than local sand. Besides, limiting the grain size of the magnetite aggregate to one fraction may also result in an increase in the porosity of the resulting composite, although the influence of this factor is, in the authors’ opinion, less than that of the proportion of the cement matrix components.…”

Section: Discussion and Summarymentioning

confidence: 99%

“…Related research areas have included studies using calorimetry to optimise the composition of heavy concrete [ 17 ] or to analyse the influence of heavyweight aggregate on cement hydration [ 18 ], as well as the effect of elevated temperatures on concrete with magnetite aggregate [ 19 , 20 , 21 ]. Studies on the various parameters of heavy concrete, to which the cementitious composite that is the subject of this paper belongs, also include works [ 22 , 23 , 24 , 25 ], which, however, did not contain a component related to the effect of aggregate fineness. Thus, this issue represents a certain gap in knowledge, which the present work aims to address.…”

Section: Introductionmentioning

confidence: 99%

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Multifaceted Analysis of the Thermal Properties of Shielding Cement-Based Composites with Magnetite Aggregate

Jaskulski,

Liszka,

Jóźwiak-Niedźwiedzka

2024

Materials

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The paper presents and discusses the results of a study of the thermal properties of cement composites with different contents of magnetite aggregate (0%, 20%, 40% and 60% by volume). The effect of grain size on the evaluated thermal properties was also investigated. For this purpose, concrete containing 50% by volume of magnetite aggregate with four different fractions (1–2 mm, 2–4 mm, 4–8 mm and 8–16 mm) was used. Thermal parameters were evaluated on specimens fully saturated with water and dried to a constant mass at 65 °C. The series with varying grain sizes of magnetite achieved thermal conductivity values in the range of 2.76–3.03 W/(m·K) and 2.00–2.21 W/(m·K) at full water saturation and after drying to a constant mass, respectively. In the case of the series with 20% magnetite by volume, the thermal conductivity was 2.65 W/(m·K) and 1.99 W/(m·K) for the material fully saturated with water and dried to a constant mass, respectively. The series with a 60% volume share of magnetite obtained values of this parameter of 3.47 W/(m·K) and 2.66 W/(m·K), respectively, under the same assumptions.

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Section: Discussion and Summarymentioning

confidence: 99%

Section: Discussion and Summarymentioning

confidence: 99%