التفاصيل البيبلوغرافية
| العنوان: |
Influence of pozzolanic addition on strength and microstructure of metakaolin-based concrete. |
| المؤلفون: |
Bansal, Manisha, Bansal, Manjeet, Bahrami, Alireza, Krishan, Bal, Garg, Rishav, Özkılıç, Yasin Onuralp, Althaqafi, Essam |
| المصدر: |
PLoS ONE; 4/10/2024, Vol. 19 Issue 4, p1-21, 21p |
| مصطلحات موضوعية: |
PORTLAND cement, CONCRETE, MICROSTRUCTURE, SCANNING electron microscopy, X-ray microscopy, POZZUOLANAS |
| مستخلص: |
The intent of this study is to explore the physical properties and long-term performance of concrete made with metakaolin (MK) as a binder, using microsilica (MS) and nanosilica (NS) as substitutes for a portion of the ordinary Portland cement (OPC) content. The dosage of MS was varied from 5% to 15% for OPC-MK-MS blends, and the dosage of NS was varied from 0.5% to 1.5% for OPC-MK-NS blends. Incorporation of these pozzolans accelerated the hardening process and reduced the flowability, consistency, and setting time of the cement paste. In addition, it produced a denser matrix, improving the strength of the concrete matrix, as confirmed by scanning electron microscopy and X-ray diffraction analysis. The use of MS enhanced the strength by 10.37%, and the utilization of NS increased the strength by 11.48% at 28 days. It also reduced the penetrability of the matrix with a maximum reduction in the water absorption (35.82%) and improved the resistance to the sulfate attack for specimens containing 1% NS in the presence of 10% MK. Based on these results, NS in the presence of MK can be used to obtain cementitious structures with the enhanced strength and durability. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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