Determination of the effect of lead mine waste aggregate on some concrete properties and radiation shielding

Çullu, Mustafa; Ertaş, Haydar

doi:10.1016/j.conbuildmat.2016.08.069

Cited by 59 publications

(26 citation statements)

References 19 publications

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“…Therefore, the powdered or coarse additions containing the heavy metals are increasingly used for manufacturing such concretes [ 29 ]. Commonly known is the use of the lead powders [ 30 ] and aggregates [ 31 ], but due to the potential toxicity [ 32 ] the use of lead in the shielding concretes has been limited. For this reason, such wastes as the IOT, iron oxides concentrates obtained from the combustion of the minerals and the wastes from the processes of mining and crushing the igneous rocks are increasingly used in the shielding concretes [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Elevated Temperatures on the Properties of Cement Mortars with the Iron Oxides Concentrate

et al. 2020

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Using the waste materials in the production of the building materials limits the storage of the wastes, burdensome for the environment and landscape, and makes possible to manufacture the materials and products with the use of the less volume of the raw materials. Cement concretes and mortars as the basic building materials offer the broad prospects of utilization of the recyclable or waste materials. The wastes from the iron ore processing are the solid wastes resulting from the process of enrichment of the ore concentrate. The paper presents the results of testing three mortars, in which a part of fine aggregate was replaced with the iron oxide concentrate (IOC) resulting from such a process. IOC has been used as a substitute of 10%, 20% and 30% (by mass) of the fine aggregate. The effect of the concentrate on the mechanical performance of the mortars at the high temperature (up to 600 °C) was also investigated. The IOC is a neutral material, not affecting chemically the process of cement hydration. The addition of IOC slightly improves the strength of the cement mortars (by 5% to 10%). In the case of the larger amount (20–30%) of the addition, the use of superplasticizer is necessary. The IOC significantly improves the high temperature resistance of the cement mortars (300 °C). The cement mortars containing 30% of the IOC addition keep 80% of the initial flexural and compressive strength when exposed to the temperature 450 °C.

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Section: Introductionmentioning

confidence: 99%

Effects of Elevated Temperatures on the Properties of Cement Mortars with the Iron Oxides Concentrate

et al. 2020

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“…To design an effective shielding, a precise knowledge of the properties of shielding materials such as radiation attenuation coefficient is needed . Some studies showed that using material with high atomic number and high density (such as iron, barite, and lead) affect significantly the shielding effect against X‐rays . These materials work very well in combination with concrete, which intrinsically possesses the ability to attenuate radiation.…”

Section: Introductionmentioning

confidence: 99%

“…2 Some studies showed that using material with high atomic number and high density (such as iron, barite, and lead) affect significantly the shielding effect against X-rays. [3][4][5][6][7][8][9][10][11][12][13] These materials work very well in combination with concrete, which intrinsically possesses the ability to attenuate radiation. However, heavy aggregates can lead segregation and bleeding effects, with a great expenditure of energy during the vibration and compaction.…”

Section: Introductionmentioning

confidence: 99%

Design of bismuth oxide nanoparticles as lightweight aggregate in cement composites against X‐rays

Restuccia

Favero

Jagdale

et al. 2019

Mat Design Process Comm

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Nowadays, heavy concrete is becoming one of the most commonly used materials against X‐ray radiation (medical or nuclear). This type of concrete is enriched by heavy aggregates with high density and/or high atomic number such as magnetite or barite, which allow to obtain an appreciable shielding effect but may present problems related to high manufacturing costs. Moreover, very heavy concretes can be achieved with iron or lead shot as aggregate, but in this case, the big problem is related to the toxicity and harmful for human health. In this research work, bismuth—a cheap, nontoxic, and biocompatible element, characterized by having a high atomic number Z (Z = 83)—has been used as additive in cement mixture, with the purpose to indagate its effectiveness as shielding agent and to analyze the mechanical strength response.

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“…Heavyweight concrete is usually used as radiation shielding because it may attenuate radiation exposure. Concrete qualifies as heavyweight when it has a specific gravity higher than 2600 kg/m 3 ; similarly, an aggregate with a specific gravity higher than 3000 kg/m 3 qualifies as a heavyweight aggregate (Çullu and Ertaş 2016). One such example of heavyweight concrete is barite (BaSO 4 ) concrete.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Barite Concrete as a Potential Neutron Radiation Shielding Material for BNCT Facilities

Murtafi'atin¹,

Widarto²,

Susilo³

et al. 2019

AJSTD

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This research aimed to determine the potential of barite concrete as a neutron radiation shielding material in the development of boron neutron capture therapy, by obtaining its neutron attenuation coefficient. Barite concrete samples were supplied by the Center of Accelerator Science and Technology in Yogyakarta, Indonesia. The experiment consisted of two parts, namely density analysis and determination of the neutron attenuation coefficient. For the latter, plutonium-beryllium was used as the neutron source, while a high purity germanium detector was used to measure the neutron radiation level. The results showed that barite concrete with a 2130 kg.m -3 density had a neutron attenuation coefficient of 0.0871 cm -1 .

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Determination of the effect of lead mine waste aggregate on some concrete properties and radiation shielding

Cited by 59 publications

References 19 publications

Effects of Elevated Temperatures on the Properties of Cement Mortars with the Iron Oxides Concentrate

Effects of Elevated Temperatures on the Properties of Cement Mortars with the Iron Oxides Concentrate

Design of bismuth oxide nanoparticles as lightweight aggregate in cement composites against X‐rays

Analysis of Barite Concrete as a Potential Neutron Radiation Shielding Material for BNCT Facilities

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