Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin
Pozzolans such as fly ash (FA) and nano-metakaolin (MK) are the two industrial wastes that have attracted the attention of researchers due to their pozzolanic action that improves the performance of cementitious materials in an aggressive environment and can reduce global cement demand and lessen th...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522009287 |
| _version_ | 1797798995271090176 |
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| author | Rishav Garg Rajni Garg Nnabuk Okon Eddy Mohd. Amir Khan Afzal Husain Khan Thamer Alomayri Parveen Berwal |
| author_facet | Rishav Garg Rajni Garg Nnabuk Okon Eddy Mohd. Amir Khan Afzal Husain Khan Thamer Alomayri Parveen Berwal |
| author_sort | Rishav Garg |
| collection | DOAJ |
| description | Pozzolans such as fly ash (FA) and nano-metakaolin (MK) are the two industrial wastes that have attracted the attention of researchers due to their pozzolanic action that improves the performance of cementitious materials in an aggressive environment and can reduce global cement demand and lessen the emission of greenhouse gases. This study analyzes the strength and durability properties of cement mortar with partial substitution of cement with MK in the presence of FA. The effect of substitution of MK in binary and ternary blends on strength and durability has been studied by varying the dosage of FA (5‐20%) as well as MK (2.5‐10%) and optimization of MK content has been carried out. A comparative analysis of beneficial aspects of FA and MK, along with their combination in optimized content at a fixed water/binder ratio of 0.5, has also been performed in terms of corrosion resistance through electrical resistivity and half-cell potential measurements. Further, the results have been correlated by microstructural analysis. The study reveals a significant increase in strength and durability of mortar at a dosage of 10% FA+7.5% MK with an increase in chloride, sulfate and corrosion resistance due to improved microstructure owed to the better pozzolanic action of the substituents with synergistic action. Thus, the partial substitution of cement with optimized content of MK (7.5%) in the presence of FA (10%) can not only help in solid waste management but can also reduce the cement consumption leading to sustainable construction. |
| first_indexed | 2024-03-13T04:12:18Z |
| format | Article |
| id | doaj.art-27d0a859023e42a5b891240620ebed85 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:18Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-27d0a859023e42a5b891240620ebed852023-06-21T06:53:15ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e01796Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolinRishav Garg0Rajni Garg1Nnabuk Okon Eddy2Mohd. Amir Khan3Afzal Husain Khan4Thamer Alomayri5Parveen Berwal6Department of Civil Engineering, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh 201310, IndiaDepartment of Applied Sciences, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh 201310, India; Corresponding authors.Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, NigeriaDepartment of Civil Engineering, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh 201310, IndiaDepartment of Civil Engineering, College of Engineering, Jazan University, PO Box. 706, Jazan 45142, Saudi Arabia; Corresponding authors.Department of Physics, Faculty of Applied Science, Umm Al-Qura University, Makkah 21955, Saudi ArabiaDepartment of Civil Engineering, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh 201310, IndiaPozzolans such as fly ash (FA) and nano-metakaolin (MK) are the two industrial wastes that have attracted the attention of researchers due to their pozzolanic action that improves the performance of cementitious materials in an aggressive environment and can reduce global cement demand and lessen the emission of greenhouse gases. This study analyzes the strength and durability properties of cement mortar with partial substitution of cement with MK in the presence of FA. The effect of substitution of MK in binary and ternary blends on strength and durability has been studied by varying the dosage of FA (5‐20%) as well as MK (2.5‐10%) and optimization of MK content has been carried out. A comparative analysis of beneficial aspects of FA and MK, along with their combination in optimized content at a fixed water/binder ratio of 0.5, has also been performed in terms of corrosion resistance through electrical resistivity and half-cell potential measurements. Further, the results have been correlated by microstructural analysis. The study reveals a significant increase in strength and durability of mortar at a dosage of 10% FA+7.5% MK with an increase in chloride, sulfate and corrosion resistance due to improved microstructure owed to the better pozzolanic action of the substituents with synergistic action. Thus, the partial substitution of cement with optimized content of MK (7.5%) in the presence of FA (10%) can not only help in solid waste management but can also reduce the cement consumption leading to sustainable construction.http://www.sciencedirect.com/science/article/pii/S2214509522009287Mechanical propertiesFly ashNano-metakaolinDurabilityMicrostructure |
| spellingShingle | Rishav Garg Rajni Garg Nnabuk Okon Eddy Mohd. Amir Khan Afzal Husain Khan Thamer Alomayri Parveen Berwal Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin Case Studies in Construction Materials Mechanical properties Fly ash Nano-metakaolin Durability Microstructure |
| title | Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin |
| title_full | Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin |
| title_fullStr | Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin |
| title_full_unstemmed | Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin |
| title_short | Mechanical strength and durability analysis of mortars prepared with fly ash and nano-metakaolin |
| title_sort | mechanical strength and durability analysis of mortars prepared with fly ash and nano metakaolin |
| topic | Mechanical properties Fly ash Nano-metakaolin Durability Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522009287 |
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