دورية أكاديمية
Mechanical Behavior and Microstructure Evaluation of Quicklime-Activated Cement Kiln Dust-Slag Binder Pastes
| العنوان: | Mechanical Behavior and Microstructure Evaluation of Quicklime-Activated Cement Kiln Dust-Slag Binder Pastes |
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| المؤلفون: | Minhui Hu, Tianwen Dong, Zhenglong Cui, Zhuo Li |
| المصدر: | Materials, Vol 17, Iss 6, p 1253 (2024) |
| بيانات النشر: | MDPI AG, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Technology LCC:Electrical engineering. Electronics. Nuclear engineering LCC:Engineering (General). Civil engineering (General) LCC:Microscopy LCC:Descriptive and experimental mechanics |
| مصطلحات موضوعية: | cement kiln dust, quicklime, mechanical behavior, microstructure, sustainable material, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85 |
| الوصف: | Cement kiln dust (CKD) is a by-product of cement production, which has the shortcomings of low utilization and high-temperature activation. This study combined CKD and slag as precursors for preparing pastes through quicklime activation under ambient conditions. The effects of quicklime and CKD content on the workability (flowability and setting time), macro-mechanical properties, and micro-structure of the CKD-slag binders were analyzed. The experimental results showed that the rapid precipitation of Ca2+, Si4+, and Al3+ ions from the CKD provided more nucleation sites for the formation of calcium aluminosilicate hydrate (C-(A)-S-H) gel and enhanced the reactivity of the binder system under the influence of the activator (CaO). The specimens had the highest unconfined compressive strength (UCS) (24.6 MPa) after 28 days with 10% quicklime content and 60% CKD content; scanning electron microscopy with energy-dispersive X-ray (SEM-EDX) analysis showed that the Ca/Si ratio of the C-(A)-S-H gel was minimized, leading to a denser microstructure and better binding ability under this mixing proportion. Therefore, this study may provide novel binder materials with a high proportion of CKD under ambient conditions. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 17061253 1996-1944 |
| Relation: | https://www.mdpi.com/1996-1944/17/6/1253; https://doaj.org/toc/1996-1944 |
| DOI: | 10.3390/ma17061253 |
| URL الوصول: | https://doaj.org/article/602c8ac6626b45cd93b8044da46a6d0d |
| رقم الأكسشن: | edsdoj.602c8ac6626b45cd93b8044da46a6d0d |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 17061253 19961944 |
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| DOI: | 10.3390/ma17061253 |