سحر محمد ابراهيم عبد الحميد
مدرس
Fabricated CeO2/ZrO2 nanocomposite to improve thermal resistance, mechanical characteristics, microstructure and gamma radiation shielding of OPC composite cement pastes
Construction and Building Materials • 2023
معلومات البحث
المؤلفون
Sahar M Ibrahim a
, Mohamed Heikal a,*
, Nesreen R. Abdelwahab b
, O.A. Mohamed c,*
الكلمات المفتاحية
CeO2/ZrO2 nanocomposite
Gamma rays shielding
OPC composite pastes
Thermal resistance
Physico-mechanical properties
المجلة العلمية
Construction and Building Materials
الناشر
Not Available
المجلد
Not Available
العدد
Not Available
الصفحات
Not Available
publication.type
International
رابط البحث
Open Link
المواد المرفقة
Not Available
الملخص
The main objective of this study is to utilize the synthesized CeO2/ZrO2 nanocomposite (CZ-NPs) in different
concentrations (0.25, 0.5, 0.75, 1, and 1.5%) for improving the mechanical characteristics, microstructural
properties, thermal resistance, and gamma radiation shielding of hardened ordinary Portland cement (OPC)
composites. CZ-NPs were fabricated via the precipitation method. Various analytical techniques in addition to Xray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), and
Scanning electron microscopy (SEM) analysis were used to investigate the fabricated CZ-NPs and hardened
composite pastes. The physico-mechanical features, thermal stability, and radiation resistivity of different OPCCZ-NPs composite pastes were investigated. The results showed that the composite CZNP1 containing 0.25% CZNPs is the best choice for mechanical performance and has the highest gamma-ray shielding efficiency, as it can
attenuate 50–90% respectively of gamma rays with energy 660Kev at distances 4 cm and 13 cm, respectively.
Also, the composite accommodating of 0.5% CZ-NPs motivates the thermal resistance at 400 ◦C.
concentrations (0.25, 0.5, 0.75, 1, and 1.5%) for improving the mechanical characteristics, microstructural
properties, thermal resistance, and gamma radiation shielding of hardened ordinary Portland cement (OPC)
composites. CZ-NPs were fabricated via the precipitation method. Various analytical techniques in addition to Xray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), and
Scanning electron microscopy (SEM) analysis were used to investigate the fabricated CZ-NPs and hardened
composite pastes. The physico-mechanical features, thermal stability, and radiation resistivity of different OPCCZ-NPs composite pastes were investigated. The results showed that the composite CZNP1 containing 0.25% CZNPs is the best choice for mechanical performance and has the highest gamma-ray shielding efficiency, as it can
attenuate 50–90% respectively of gamma rays with energy 660Kev at distances 4 cm and 13 cm, respectively.
Also, the composite accommodating of 0.5% CZ-NPs motivates the thermal resistance at 400 ◦C.