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Monitoring the early-age shrinkage cracking of concrete with superabsorbent polymers by means of optical fiber (SOFO) sensors

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Abstract
Concrete structures are subjected to shrinkage since the moment when the water makes contact with the cement. From that moment on, depending on the concrete composition and its curing conditions, chemical, autogenous and drying shrinkage might increase the risk of early-age cracking. Once a crack is formed, it may become the preferential path for the ingress of many aggressive agents inside the structure increasing the probability of damage due to corrosion, carbonation and other mechanisms.The use of superabsorbent polymers (SAPs) has been extensively studied to reduce the shrinkage cracking risk in mortar specimens by acting as internal curing agent to mitigate autogenous shrinkage. In this paper, a commercially available SAP was investigated as shrinkage reducing agentby means of internal curing in concrete specimens. The shrinkage of the concrete was monitored for 28 days with both a demountable mechanical strain gauge (DEMEC) and optical fiber sensors (SOFO).The SAP-containing concrete showed a complete mitigation of autogenous shrinkage during 28 days of measurement, for both methods. The SOFO sensors showed the occurrence of cracks after 7 days for the reference mixture, while for the SAP containing mixture, no crack was identified during the 28 days of measurements.
Keywords
Early-Age Cracking, Superabsorbent Polymers, Internal Curing, SOFO Sensors

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MLA
Tenório Filho, José Roberto, et al. “Monitoring the Early-Age Shrinkage Cracking of Concrete with Superabsorbent Polymers by Means of Optical Fiber (SOFO) Sensors.” XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, edited by Carles Serrat et al., International Center for Numerical Methods in Engineering (CIMNE), 2020, pp. 1527–34, doi:10.23967/dbmc.2020.099.
APA
Tenório Filho, J. R., Snoeck, D., & De Belie, N. (2020). Monitoring the early-age shrinkage cracking of concrete with superabsorbent polymers by means of optical fiber (SOFO) sensors. In C. Serrat, J. R. Casas, & V. Gilbert (Eds.), XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings (pp. 1527–1534). Barcelona: International Center for Numerical Methods in Engineering (CIMNE). https://doi.org/10.23967/dbmc.2020.099
Chicago author-date
Tenório Filho, José Roberto, Didier Snoeck, and Nele De Belie. 2020. “Monitoring the Early-Age Shrinkage Cracking of Concrete with Superabsorbent Polymers by Means of Optical Fiber (SOFO) Sensors.” In XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, edited by Carles Serrat, Joan Ramon Casas, and Vicente Gilbert, 1527–34. Barcelona: International Center for Numerical Methods in Engineering (CIMNE). https://doi.org/10.23967/dbmc.2020.099.
Chicago author-date (all authors)
Tenório Filho, José Roberto, Didier Snoeck, and Nele De Belie. 2020. “Monitoring the Early-Age Shrinkage Cracking of Concrete with Superabsorbent Polymers by Means of Optical Fiber (SOFO) Sensors.” In XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, ed by. Carles Serrat, Joan Ramon Casas, and Vicente Gilbert, 1527–1534. Barcelona: International Center for Numerical Methods in Engineering (CIMNE). doi:10.23967/dbmc.2020.099.
Vancouver
1.
Tenório Filho JR, Snoeck D, De Belie N. Monitoring the early-age shrinkage cracking of concrete with superabsorbent polymers by means of optical fiber (SOFO) sensors. In: Serrat C, Casas JR, Gilbert V, editors. XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings. Barcelona: International Center for Numerical Methods in Engineering (CIMNE); 2020. p. 1527–34.
IEEE
[1]
J. R. Tenório Filho, D. Snoeck, and N. De Belie, “Monitoring the early-age shrinkage cracking of concrete with superabsorbent polymers by means of optical fiber (SOFO) sensors,” in XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, Barcelona, Spain, 2020, pp. 1527–1534.
@inproceedings{8678501,
  abstract     = {Concrete structures are subjected to shrinkage since the moment when the water makes contact with the cement. From that moment on, depending on the concrete composition and its curing conditions, chemical, autogenous and drying shrinkage might increase the risk of early-age cracking. Once a crack is formed, it may become the preferential path for the ingress of many aggressive agents inside the structure increasing the probability of damage due to corrosion, carbonation and other mechanisms.The use of superabsorbent polymers (SAPs) has been extensively studied to reduce the shrinkage cracking risk in mortar specimens by acting as internal curing agent to mitigate autogenous shrinkage. In this paper, a commercially available SAP was investigated as shrinkage reducing agentby means of internal curing in concrete specimens. The shrinkage of the concrete was monitored for 28 days with both a demountable mechanical strain gauge (DEMEC) and optical fiber sensors (SOFO).The SAP-containing concrete showed a complete mitigation of autogenous shrinkage during 28 days of measurement, for both methods. The SOFO sensors showed the occurrence of cracks after 7 days for the reference mixture, while for the SAP containing mixture, no crack was identified during the 28 days of measurements.},
  author       = {Tenório Filho, José Roberto and Snoeck, Didier and De Belie, Nele},
  booktitle    = {XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings},
  editor       = {Serrat, Carles and Casas, Joan Ramon and Gilbert, Vicente},
  isbn         = {9788412110180},
  keywords     = {Early-Age Cracking,Superabsorbent Polymers,Internal Curing,SOFO Sensors},
  language     = {eng},
  location     = {Barcelona, Spain},
  pages        = {1527--1534},
  publisher    = {International Center for Numerical Methods in Engineering (CIMNE)},
  title        = {Monitoring the early-age shrinkage cracking of concrete with superabsorbent polymers by means of optical fiber (SOFO) sensors},
  url          = {http://dx.doi.org/10.23967/dbmc.2020.099},
  year         = {2020},
}

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