A waste-derived nanocomposite sealant for repairing micro-cracks in concrete

Kannan, Uthradevi; Gafoor, Shibil Abdul; Srivastava, Sonali; Nithyadharan, M.; Gupta, Soujit Sen; Maliyekkal, Shihabudheen M.

doi:10.1016/j.jobe.2021.103965

Cited by 8 publications

(4 citation statements)

References 20 publications

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“… GO assists crack repair and heat dissipation in concrete [ 86 , 87 ]. ( a ) Principle of GO crack repair; ( b ) comparison of temperature nephogram of concrete mixed with RGO.…”

Section: Figurementioning

confidence: 99%

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Zhao

Zhang

2023

Materials

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Graphene, with its excellent properties and unique structure, has been extensively studied in the context of modifiable cement-based materials. However, a systematic summary of the status of numerous experimental results and applications is lacking. Therefore, this paper reviews the graphene materials that improve the properties of cement-based materials, including workability, mechanical properties, and durability. The influence of graphene material properties, mass ratio, and curing time on the mechanical properties and durability of concrete is discussed. Furthermore, graphene’s applications in improving interfacial adhesion, enhancing electrical and thermal conductivity of concrete, absorbing heavy metal ions, and collecting building energy are introduced. Finally, the existing issues in current study are analyzed, and the future development trends are foreseen.

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“… GO assists crack repair and heat dissipation in concrete [ 86 , 87 ]. ( a ) Principle of GO crack repair; ( b ) comparison of temperature nephogram of concrete mixed with RGO.…”

Section: Figurementioning

confidence: 99%

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Zhao

Zhang

2023

Materials

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“…A superfície da quitosana contém um grande número de grupos amino e hidroxila, que podem ser facilmente modificados para produzir uma resposta a diferentes comportamentos [27]. Aliado ao seu baixo custo, sua utilização tem sido bastante investigada no meio científico ao longo dos anos, e não só na área da construção civil em compósitos cimentícios [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43], como também em outras aplicações, tais como, na medicina [44,45], na agricultura [46,47] e cosméticos [48,49].…”

Section: Introductionunclassified

Concreto de cimento Portland dopado com quitosana: propriedades mecânicas e microestrutural

Silva

et al. 2023

Matéria (Rio J.)

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RESUMO A construção civil exerce função importante no consumo de energia em todo o mundo e influência, de forma significativa, o consumo total de recursos naturais e as emissões de CO2. A utilização de materiais renováveis está intrinsecamente relacionada à pesquisa e à inovação. A reutilização, a reciclagem, bem como o desenvolvimento de novos materiais e a descoberta de novas aplicações para materiais renováveis já conhecidos, podem contribuir de maneira expressiva para o desenvolvimento sustentável. A quitosana (CS) é um biopolímero com uma estrutura química e características únicas aliadas à sua farta disponibilidade como derivado da quitina, fazem com que suas possibilidades de aplicação nos mais diferentes campos tecnológicos, tenha se expandido consideravelmente. No presente trabalho, a utilização da quitosana para produção de concretos por meio de teores ótimos é investigada. Os valores de quitosana incorporados na dosagem foram 0,1%; 0,3% e 0,4%, com relação à massa de cimento. Os diferentes concretos obtidos foram submetidos a ensaios de propriedades mecânicas e microestrutural. Os resultados mostraram que a microestrutura foi favorecida com a utilização da quitosana. Bem como, apresentaram resultados favoráveis à incorporação dos teores utilizados de quitosana (se desatacando as amostras com 0,1% de substituição), sendo positivos quanto às propriedades mecânicas para a maioria das técnicas utilizadas, o que indica fortemente que a quitosana pode ser considerada como material promissor a ser incorporado na produção de concreto.

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“…There are many methods to repair the damage of concrete structures [ 7 ], including a replacement method [ 8 ], surface sealing method [ 9 ], plugging method [ 10 ], and electrochemical method [ 11 ]. These methods are traditional methods to repair cracks in engineering; they play an important role in practical engineering and reduce the loss caused by cracks.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on High-Temperature Damage Repair of Concrete by Soybean Urease Induced Carbonate Precipitation

et al. 2022

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In this study, the effects of soybean-urease-induced carbonate precipitation on a high-temperature damage repair of concrete were explored. C50 concrete specimens were exposed to high temperatures from 300 to 600 °C, then cooled to an ambient temperature and repaired by two different methods. The influences of the damage temperature and repair methods on surface film thickness, average infrared temperature increase, water absorption, and compressive strength were investigated. Scanning electron microscopy (SEM) images were carried out to further study the mechanism involved. The results revealed that the white sediments on the surface of the repaired specimens were calcium carbonate (CaCO3) and calcium oxalate (CaC2O4). The surface film thickness reached up to 1.94 mm after repair. The average infrared temperature increase in the repaired specimens at different damage temperatures was averagely reduced by about 80% compared with that before the repair. It showed more obvious repair effects at higher temperatures in water absorption and compressive strength tests; the compressive strength of repaired specimens was 194% higher than that before repairs at 600 °C. A negative pressure method was found to be more effective than an immersion method. This study revealed the utilization of SICP on repairing high-temperature damage of concrete is feasible theoretically.

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A waste-derived nanocomposite sealant for repairing micro-cracks in concrete

Cited by 8 publications

References 20 publications

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Concreto de cimento Portland dopado com quitosana: propriedades mecânicas e microestrutural

Experimental Study on High-Temperature Damage Repair of Concrete by Soybean Urease Induced Carbonate Precipitation

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