Densifying hydration products of alite by a bio-inspired admixture
A bio-inspired, plant-derived polyphenol, tannic acid (TA) was identified as a renewable admixture to improve the compressive strength of concretes. Aiming to understand the underlying mechanism responsible for this strength improvement, this study examines how TA mediates the hydration of tricalciu...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-01-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522011133 |
| _version_ | 1828051341903134720 |
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| author | Yi Fang Jialai Wang Liang Wang Xin Qian Xiaodong Wang Wenyu Liao Peiyuan Chen Hongyan Ma |
| author_facet | Yi Fang Jialai Wang Liang Wang Xin Qian Xiaodong Wang Wenyu Liao Peiyuan Chen Hongyan Ma |
| author_sort | Yi Fang |
| collection | DOAJ |
| description | A bio-inspired, plant-derived polyphenol, tannic acid (TA) was identified as a renewable admixture to improve the compressive strength of concretes. Aiming to understand the underlying mechanism responsible for this strength improvement, this study examines how TA mediates the hydration of tricalcium silicate (alite). Experimental study shows that TA can form complex with calcium ions through chelating, retarding the hydration of the alite and changing of the hydration products. Particularly, X-ray diffraction analysis shows that TA makes calcium hydroxide preferentially grow on the [001] face. Fourier-transform infrared spectroscopy and 29Si MAS NMR results reveal that the mean chain length of calcium silicate hydrate (CSH) is reduced by TA. More importantly, mercury intrusion porosimetry testing reveals that pores with size near 30 nm was almost eliminated by adding TA, leading to higher elastic modulus of the produced CSH and higher compressive strength of the produced concrete. |
| first_indexed | 2024-04-10T19:36:15Z |
| format | Article |
| id | doaj.art-1405d3791ed04d9cb55f6121335d7bbb |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-10T19:36:15Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-1405d3791ed04d9cb55f6121335d7bbb2023-01-30T04:12:13ZengElsevierMaterials & Design0264-12752023-01-01225111490Densifying hydration products of alite by a bio-inspired admixtureYi Fang0Jialai Wang1Liang Wang2Xin Qian3Xiaodong Wang4Wenyu Liao5Peiyuan Chen6Hongyan Ma7College of Mechanics and Materials, Hohai University, Nanjing, Jiangsu 211100, PR China; Department of Civil, Construction, and Environmental Engineering, The University of Alabama, Tuscaloosa, AL 35487, United StatesDepartment of Civil, Construction, and Environmental Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States; Corresponding authors.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, PR ChinaKey Laboratory of Infrastructure Durability and Operation Safety in Airfield of CAAC, Tongji University, Shanghai 201804, PR China; Corresponding authors.Department of Civil, Construction, and Environmental Engineering, The University of Alabama, Tuscaloosa, AL 35487, United StatesDepartment of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65401, United StatesSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, PR ChinaDepartment of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65401, United StatesA bio-inspired, plant-derived polyphenol, tannic acid (TA) was identified as a renewable admixture to improve the compressive strength of concretes. Aiming to understand the underlying mechanism responsible for this strength improvement, this study examines how TA mediates the hydration of tricalcium silicate (alite). Experimental study shows that TA can form complex with calcium ions through chelating, retarding the hydration of the alite and changing of the hydration products. Particularly, X-ray diffraction analysis shows that TA makes calcium hydroxide preferentially grow on the [001] face. Fourier-transform infrared spectroscopy and 29Si MAS NMR results reveal that the mean chain length of calcium silicate hydrate (CSH) is reduced by TA. More importantly, mercury intrusion porosimetry testing reveals that pores with size near 30 nm was almost eliminated by adding TA, leading to higher elastic modulus of the produced CSH and higher compressive strength of the produced concrete.http://www.sciencedirect.com/science/article/pii/S0264127522011133Tricalcium silicateTannic acidBioinspirationAdmixtureCSH |
| spellingShingle | Yi Fang Jialai Wang Liang Wang Xin Qian Xiaodong Wang Wenyu Liao Peiyuan Chen Hongyan Ma Densifying hydration products of alite by a bio-inspired admixture Materials & Design Tricalcium silicate Tannic acid Bioinspiration Admixture CSH |
| title | Densifying hydration products of alite by a bio-inspired admixture |
| title_full | Densifying hydration products of alite by a bio-inspired admixture |
| title_fullStr | Densifying hydration products of alite by a bio-inspired admixture |
| title_full_unstemmed | Densifying hydration products of alite by a bio-inspired admixture |
| title_short | Densifying hydration products of alite by a bio-inspired admixture |
| title_sort | densifying hydration products of alite by a bio inspired admixture |
| topic | Tricalcium silicate Tannic acid Bioinspiration Admixture CSH |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522011133 |
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