Hydration behavior and performance of montmorillonite-modified natural hydraulic lime for internal curing

doi:10.11835/j.issn.1000.582X.2024.10.012

Home > Archive>Volume 47, Issue 10, 2024 >162-171. DOI:10.11835/j.issn.1000.582X.2024.10.012

Hydration behavior and performance of montmorillonite-modified natural hydraulic lime for internal curing
DOI:
                        10.11835/j.issn.1000.582X.2024.10.012
                    
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                        ZHANG Biao1ZHANG Biao
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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QI Nan1QI Nan
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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GUAN Xuan1GUAN Xuan
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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WANG Wenke1WANG Wenke
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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SHI Pei1SHI Pei
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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HE Jing1HE Jing
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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MA Tao1,2MA Tao
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China;Key Scientific Research Base of Conservation for Brick and Stone Cultural Relics(National Cultural Heritage Administation), Shaanxi Institute for the Preservation of Cultural Heritage, Xi’an710075, P. R. China
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LUO Hongjie1,3LUO Hongjie
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China;School of Cultural Heritage and Information Management; 3b. Key Laboratory of Silicate Cultural Relics Conservation, Ministry ofEducation, Shanghai University, Shanghai200444, P. R. China
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ZHU Jianfeng1ZHU Jianfeng
a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China
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Affiliation:1.a. School of Material Science and Engineering; 1b. School of Conservation Science and Technology for Cultural Heritage; 1c. Key Laboratory of Underground Cultural Relics Conservation Materials and Technology, Ministry of Education, Shaanxi University of Science and Technology, Xi’an710021, P. R. China;2.Key Scientific Research Base of Conservation for Brick and Stone Cultural Relics(National Cultural Heritage Administation), Shaanxi Institute for the Preservation of Cultural Heritage, Xi’an710075, P. R. China;3.School of Cultural Heritage and Information Management; 3b. Key Laboratory of Silicate Cultural Relics Conservation, Ministry ofEducation, Shanghai University, Shanghai200444, P. R. China
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Fund Project:Supported by National Natural Science Foundation of China(52102108, 52102026, 52272020), China Postdoctoral Science Foundation(2021M691997), Key Scientific Research Program of Education Department of Shaanxi Provincial Government(22JY009, 22JY010) ,and the Project of Key Laboratory of Silicate Cultural Relics Conservation (Shanghai University), Ministry of Education (SCRC2024KF10YQ).

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Abstract:

Cave temples, a unique type of cultural relics in China, possess extremely important historical, artistic and scientific value. Cracks are the main cause of instability, seepage,weathering and other forms of damage in these structures. Conventional external curing grouts and reinforcement methods are ineffective in addressing shrinkage cracking and insufficient strength caused by water shortages in deep cracks during the later curing stages. This study prepares montmorillonite (MMT)-modified natural hydraulic lime (NHL) for internal curing through a one-step in situ polymerization process and systematically evaluates the hydration behavior and performance of the modified NHL during curing. Results show that the internal curing effect of NHL is optimal at a 2% MMT content. After 7 days of curing, the autogenous shrinkage of the modified sample is only 56.70% of that of the blank sample, demonstrating excellent water retention. Moreover, the compressive strength of the modified NHL after 28 days of curing increased by 22.03% compared with the blank sample. This improvement is attributed to MMT’s ability to continuously release interlayer-adsorbed water under the sample’s internal humidity gradient during the entire curing process, promoting the hydration reaction of NHL, reducing autogenous shrinkage, and improving the internal curing effect. This study provides an important theoretical and practical foundation for the development of internal curing grouts and reinforcement techniques for cracks in cave temples.

Key words:natural hydraulic lime;montmorillonite;internal curing;autogenous shrinkage;grouting reinforcement

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张彪,齐南,管璇,王文科,施佩,何静,马涛,罗宏杰,朱建锋.蒙脱土内养护天然水硬性石灰的水化行为及使用性能研究[J].重庆大学学报,2024,47(10):162~171

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Received:December 31,2023
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Online: November 14,2024
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