Case Studies in Construction Materials, Год журнала: 2024, Номер 21, С. e03994 - e03994
Опубликована: Ноя. 17, 2024
Язык: Английский
Engineering Structures, Год журнала: 2024, Номер 303, С. 117516 - 117516
Опубликована: Янв. 23, 2024
Язык: Английский
Процитировано
31
Journal of Building Engineering, Год журнала: 2024, Номер 86, С. 108758 - 108758
Опубликована: Фев. 6, 2024
Recycled glass can be ground into different particle sizes to partially replace cement or aggregates, which is important for developing sustainable concrete production. In this study, a total of 16 mixes containing powder (GP), silica fume (SF) and sand (GS) were designed investigate the fresh harden material properties at ambient temperature, heat transfer mechanism temperature development, mass loss, apparent change surface texture as well residual compressive strength elastic modulus after exposure elevated temperatures (400–1000 °C). Results show that possesses larger slump flow suffers less loss are believed caused by improved wet packing density (WPD) existence more abundant excess water. Besides, replacing with GP up 15% and/or SF 10% would enhance 11.6% 4.7% respectively 4.5% 5.3% concrete. At temperatures, core was lower, indicating could provide an effective solution in improving concrete's heat-insulation capacity due enhanced WPD. After 400, 600, 800 1000 °C, incorporation enhancing maximum 15.2%, 38.3%, 9.1% 37.5% 7.5%, 17.3%, 19.4% 19.5%, WPD re-solidification GP/GS its molten state strengthened interface transition zone.
Язык: Английский
Процитировано
25
Case Studies in Construction Materials, Год журнала: 2024, Номер 20, С. e02946 - e02946
Опубликована: Фев. 5, 2024
Owing to the higher strength-to-weight ratio and elastic modulus as well more cost-effective, high-strength concrete (HSC) is now becoming increasing popular. However, huge demand of HSC results in over-exploitation river sand (RS) other raw materials, which impairs environment. Steel slag, a waste by-product steel-making process, has been reported be great substitute for RS. up now, relatively few research studies investigated post-fire behavior steel slag fine aggregate (SSFA) HSC. To promote practical application SSFA RS HSC, its at ambient after exposure elevated temperatures should studied thoroughly. Thus, 27 mixtures with different / or silica fume (SF) volumetric replacement ratios, amounts superplasticizer (SP) were designed series experimental tests conducted, including slump-flow, wet packing density (WPD), X-ray diffraction, compressive strength heating target 600, 800and 1000°C. Results revealed that physical chemical characteristics could enhance but impair flowability, mitigated by adding suitable amount SF SP. Besides, may disadvantageous owing enhanced WPD, whose relative index was reduced from 0.185~0.199 0.084~0.127 fully replacing upon
Язык: Английский
Процитировано
13
Engineering Structures, Год журнала: 2024, Номер 305, С. 117673 - 117673
Опубликована: Фев. 28, 2024
Язык: Английский
Процитировано
11
Journal of Building Engineering, Год журнала: 2024, Номер 86, С. 108809 - 108809
Опубликована: Фев. 16, 2024
Язык: Английский
Процитировано
9
Construction and Building Materials, Год журнала: 2024, Номер 425, С. 136073 - 136073
Опубликована: Апрель 1, 2024
Язык: Английский
Процитировано
9
Journal of Constructional Steel Research, Год журнала: 2024, Номер 218, С. 108714 - 108714
Опубликована: Апрель 26, 2024
Язык: Английский
Процитировано
9
Thin-Walled Structures, Год журнала: 2024, Номер 198, С. 111714 - 111714
Опубликована: Фев. 15, 2024
Язык: Английский
Процитировано
8
Construction and Building Materials, Год журнала: 2024, Номер 435, С. 136728 - 136728
Опубликована: Май 28, 2024
Heavy-weight concrete (HWC) is currently the most widely used radiation shielding material in nuclear industry. However, pre- and post-fire mechanical behavior of HWC containing Iron sand (IS) and/or fly ash (FA) not thoroughly studied. This paper fills research gap by testing 12 mixes, which replaced river (RS) with 50% or 100% IS ordinary Portland cement (OPC) 15%, 25% 35% FA volume. The temperature-time curve, mass loss, surface change, onset spalling, failure modes, residual compressive strength, elastic modulus stress-strain curve after having exposed to 400, 600, 800 1000°C were investigated. Additionally, chemical compositions analyzed X-ray diffraction. Results demonstrated that flowability increased / replacement ratio due more spherical shape improved packing structure. Replacing RS 15% OPC could effectively enhance thermal insulation capacity, strength (increased 9.5% at 25°C 400°C, 12.9% 600°C, 46.0% 800°C 63.6% compared normal concrete) 26.3% 25°C, 17.5% 20.5% 120% HWC. Lastly, all obtained results suggested characteristic explicable/predictable theory wet density.
Язык: Английский
Процитировано
8
Magazine of Concrete Research, Год журнала: 2024, Номер unknown, С. 1 - 13
Опубликована: Июнь 11, 2024
Heavy-weight concrete (HWC) is a widely adopted radiation shielding material in the nuclear industry. In this study, two kinds of high-density aggregate, namely, iron sand (IS) and steel slag coarse aggregate (SSCA), were to fully replace river natural respectively, producing ultra-heavy-weight (UHWC) with unit weight >3800 kg/m 3 , ensure excellent performance. However, IS SSCA seriously impaired passing ability UHWC as cement paste could not hold firmly aggregates, owing their high density. To overcome this, rheology should be optimised by partially replacing superfine silica fume (SSF) using suitable amount superplasticiser (SP) enhance wet packing density (WPD). A total 28 mixes different replacement ratios SSF SP dosages tested for segregation width, flowability, L-box ability, WPD. Results revealed that incorporating an appropriate quantity improved WPD UHWC, resulting resistance, enhanced increased higher weight. Lastly, there positive correlation between
Язык: Английский
Процитировано
8