Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite
This study investigates the durability enhancement of recycled concrete aggregates (RCA) through the application of nano-montmorillonite (NMT), aiming to address their inferior durability compared to natural aggregates. Utilizing RCA sourced from demolished structures aged 10–30 years and NMT with a...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-04-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016825001504 |
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| author | Wei Yuan Jie Li Ziwei Cai |
| author_facet | Wei Yuan Jie Li Ziwei Cai |
| author_sort | Wei Yuan |
| collection | DOAJ |
| description | This study investigates the durability enhancement of recycled concrete aggregates (RCA) through the application of nano-montmorillonite (NMT), aiming to address their inferior durability compared to natural aggregates. Utilizing RCA sourced from demolished structures aged 10–30 years and NMT with a particle size of 70–100 nm, five concrete mix proportions were prepared, including a control mix with 100 % natural aggregates and four mixes with 60 % RCA replacement, varying in NMT content (1 %, 3 %, 5 % by weight). The optimal NMT dosage was identified as 3 %, where it significantly improved durability indicators. At this dosage, the 28-day compressive strength of RCA concrete was only 3–4 % lower than the control mix, and at 90 days, it matched or exceeded the control by 1–2 %. Carbonation depth reduced by 49 %, drying shrinkage by 46 %, and chloride ion ingress showed over 51 % reduction compared to the RCA mix without NMT. Electrical resistivity improved by 63 %, underscoring NMT's effectiveness in enhancing RCA concrete's durability, crucial for sustainable construction practices. |
| format | Article |
| id | doaj-art-d747ec2d2c324d7fa66e726c204ae204 |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-d747ec2d2c324d7fa66e726c204ae2042025-01-31T05:10:12ZengElsevierAlexandria Engineering Journal1110-01682025-04-01118692699Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorilloniteWei Yuan0Jie Li1Ziwei Cai2School of Architecture, Henan University of Technology, Zhengzhou, Henan 450001, ChinaSchool of Architecture, Tianjin University, Tianjin, 300072, China; Corresponding author.China Southwest Architectural Design and Research Institute Corp. Ltd, Chengdu, Sichuan 610000, ChinaThis study investigates the durability enhancement of recycled concrete aggregates (RCA) through the application of nano-montmorillonite (NMT), aiming to address their inferior durability compared to natural aggregates. Utilizing RCA sourced from demolished structures aged 10–30 years and NMT with a particle size of 70–100 nm, five concrete mix proportions were prepared, including a control mix with 100 % natural aggregates and four mixes with 60 % RCA replacement, varying in NMT content (1 %, 3 %, 5 % by weight). The optimal NMT dosage was identified as 3 %, where it significantly improved durability indicators. At this dosage, the 28-day compressive strength of RCA concrete was only 3–4 % lower than the control mix, and at 90 days, it matched or exceeded the control by 1–2 %. Carbonation depth reduced by 49 %, drying shrinkage by 46 %, and chloride ion ingress showed over 51 % reduction compared to the RCA mix without NMT. Electrical resistivity improved by 63 %, underscoring NMT's effectiveness in enhancing RCA concrete's durability, crucial for sustainable construction practices.http://www.sciencedirect.com/science/article/pii/S1110016825001504Sustainable constructionNanotechnologyDurability indicatorsRecycled aggregatesChloride ion ingressElectrical resistivity |
| spellingShingle | Wei Yuan Jie Li Ziwei Cai Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite Alexandria Engineering Journal Sustainable construction Nanotechnology Durability indicators Recycled aggregates Chloride ion ingress Electrical resistivity |
| title | Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite |
| title_full | Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite |
| title_fullStr | Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite |
| title_full_unstemmed | Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite |
| title_short | Investigating the durability enhancement of recycled construction concrete through the application of nano-montmorillonite |
| title_sort | investigating the durability enhancement of recycled construction concrete through the application of nano montmorillonite |
| topic | Sustainable construction Nanotechnology Durability indicators Recycled aggregates Chloride ion ingress Electrical resistivity |
| url | http://www.sciencedirect.com/science/article/pii/S1110016825001504 |
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