Engineering and gamma-ray attenuation properties of steel furnace slag heavyweight concrete with nano calcium carbonate and silica

Khalaf, Mohammed A.; Cheah, Chee Ban; Ramli, Mahyuddin; Ahmed, Naser M.; Al-Asady, Ahmed Mohammed Abid; Ali, Amal Mohamed Ahmed; Al-Shwaiter, Abdullah; Tangchirapat, Weerachart

doi:10.1016/j.conbuildmat.2020.120878

Cited by 28 publications

(9 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As the density of the concrete sample increases, the damping coefcient should also increase. Te relationship between the damping coefcient and the density is expressed as a linear regression relationship [34,35]. In the present study, the reason for the increase in density is the substitution of lead slag and serpentine aggregates.…”

Section: Resultsmentioning

confidence: 71%

Mechanical, Durability, and Gamma Ray Shielding Characteristics of Heavyweight Concrete Containing Serpentine Aggregates and Lead Waste Slag

Sayyadi

Mohammadi

Adlparvar

2023

Advances in Civil Engineering

View full text Add to dashboard Cite

Heavyweight concrete is used to prevent harmful radiation for the construction of hospital, military, and nuclear power plants and also to increase the durability for the construction of marine concrete structures. In this research, using a combination of serpentine aggregates and lead slag, the mechanical, durability, impact resistance, and shielding properties of heavyweight concrete were examined. The variables included fine and coarse serpentine aggregates, which were replaced with normal fine and coarse aggregates in amounts of 0, 25, 50, and 100 percent, respectively. The lead slag in all samples was considered constant. Slump, compressive strength, flexural strength, water penetration depth, impact resistance (drop hammer), and gamma ray attenuation coefficient tests were conducted. The chemical composition of serpentine aggregates and lead slag were evaluated by X-ray powder diffraction. The results showed that the density and linear attenuation coefficient (LAC) increased with the increase of fine and coarse serpentine aggregates in heavyweight concrete containing lead slag. The highest density and LAC were obtained in a sample in which 100% fine serpentine aggregates and 100% coarse serpentine aggregates were used. Using 25% of serpentine fine aggregates and 25% of serpentine coarse aggregates in heavyweight concrete samples containing lead slag has achieved the highest compressive strength and flexural strength. But with the increase of fine and coarse serpentine aggregates to more than 25%, the upward trend of increasing compressive strength decreased. Silica constitutes a large part of the chemical structure of serpentine aggregates (about 42%). Increasing the amount of serpentine aggregates in concrete mixes leads to excessive release of calcium hydroxide in concrete. This issue can lead to the formation of a weak zone in concrete and decrease the compressive and impact resistance.

show abstract

Section: Resultsmentioning

confidence: 71%

Mechanical, Durability, and Gamma Ray Shielding Characteristics of Heavyweight Concrete Containing Serpentine Aggregates and Lead Waste Slag

Sayyadi

Mohammadi

Adlparvar

2023

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…It has much higher surface areas to be wetted by the mixing water, thereby leaving less free water that will contribute to the flowability of the fresh mix. [68][69][70] 3.2 | Mechanical properties and 90 days. The result of the concrete mixture containing (SS as a coarse aggregate, sand as a fine aggregate, and 3% NS) achieved higher compressive strength up to 103.1 MPa at test ages of 28 days.…”

Section: Workabilitymentioning

confidence: 99%

Effects of nano titanium and nano silica on high‐strength concrete properties incorporating heavyweight aggregate

Abu el‐Hassan,

Hakeem,

Amin

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

This investigation aims to study the effect of replacing 100% of fine and coarse aggregates with heavyweight aggregates and adding nano titanium (NT) and nano silica (NS) on shielding against radiation and on the mechanical and transport properties of heavyweight high‐strength concrete (HWHSC). In this study, 20 mixes were prepared that included the use of hematite and steel slag (SS) aggregate with NS or NT used as additions to mixes by the ratio 1% and 3% from cement weight. To study the effect of the total replacement of aggregates and the addition of nanomaterials (NMs) on the properties of HWHSC, to study engineering properties the slump, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity were applied. Density, chloride permeability, sorptivity coefficient, water permeability, and microstructure tests were also performed. To study the efficiency of shielding against radiation, linear attenuation coefficient, mass attenuation coefficient, mean‐free path, half‐value layer, and tenth‐value layer of different gamma‐ray sources of radiation 137Cs 662 (keV) and 60Co 1332 (keV) were applied. The results showed that the 100% SS and hematite replacement as coarse and fine aggregates with 3% (NS or NT) achieved the best mechanical and transport properties compared to other mixtures. While the highest density of the string containing hematite and SS was achieved with 3% of NT, with a density of 3384 kg/m3. The highest compressive strength of more than 116 MPa was achieved for the included mixture of 3% NS. The highest attenuation of gamma‐ray radiation was achieved with the application of hematite and SS aggregates with 3% of NT.

show abstract

“…Jest on zwykle wykonywany z kruszyw ciężkich i stosowany jako osłona przed promieniowaniem (1)(2)(3). Gęstość betonu ciężkiego wynosi od 3500 do 6000 kg/cm 3 , czyli około 1,5-2,5 razy więcej, niż typowego betonu (4)(5)(6)(7). Wraz z postępem nauki, inżynierowie budownictwa jądrowego oraz lądowego i wodnego zawsze starali się projektować materiały wykorzystujące kruszywa, które mogą odgrywać rolę ochronną przed promieniowaniem X i gamma.…”

Section: Wprowadzenieunclassified

“…[ACI], heavy-mass concrete is defi ned as concrete with a specifi c gravity higher than that of concrete made of typical aggregates, which is usually prepared by heavy-mass aggregates and applied as a shield against radiation (1)(2)(3). The specifi c gravity of heavy--mass concrete is approximately 3500-6000 kg/cm 3 , which is approximately 1.5-2.5 times higher than that of typical concrete (4)(5)(6)(7). With the progress of science, nuclear and civil engineers have always tried to design materials using aggregates, which can play a protective role against radiation such as X and gamma rays.…”

Section: Metody Doświadczalne 1 Introductionmentioning

confidence: 99%

Ferrophosphorus aggregates shielding properties on heavy concrete exposed to gamma-rays, cesium-137 source

2021

View full text Add to dashboard Cite

This study aims to investigate the linear attenuation coefficient and density of samples made of ferrophosphorus and typical aggregates, steel powder, and nanosilica powder in different ratios. Therefore, 60 concrete samples with dimensions of 15×15×15 cm and different contents of the mentioned materials were prepared. After the density was measured, the linear attenuation coefficients of the samples were measured by gamma radiation emitted from the cesium-137 source. The results showed that ferrophosphorus was the most effective factor in increasing the linear attenuation coefficient and the density of the concrete. After ferrophosphorus, steel and nanosilica powder – although much less than ferrophosphorus – increased the density and linear attenuation coefficient. The sample made of 100% ferrophosphorus aggregate and 20% steel powder without nanosilica powder had the highest density of 4395 kg/m3, and the sample made of 100% typical aggregate and 10% steel powder, without nanosilica powder, had the lowest density equal to 2269 kg/m3. The highest linear attenuation coefficient – 0.295 was related to the sample made of 100% ferrophosphorus, 30% steel powder, and 5% nanosilica powder. The lowest linear attenuation coefficient – 0.151 was related to the sample made of 8% nanosilica, without the ferrophosphorus and steel powder. The results indicated that the concrete density was directly correlated with the linear attenuation coefficient.

show abstract

Engineering and gamma-ray attenuation properties of steel furnace slag heavyweight concrete with nano calcium carbonate and silica

Cited by 28 publications

References 67 publications

Mechanical, Durability, and Gamma Ray Shielding Characteristics of Heavyweight Concrete Containing Serpentine Aggregates and Lead Waste Slag

Mechanical, Durability, and Gamma Ray Shielding Characteristics of Heavyweight Concrete Containing Serpentine Aggregates and Lead Waste Slag

Effects of nano titanium and nano silica on high‐strength concrete properties incorporating heavyweight aggregate

Ferrophosphorus aggregates shielding properties on heavy concrete exposed to gamma-rays, cesium-137 source

Contact Info

Product

Resources

About