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Experimental indication of imbibition during capillary water uptake in cementitious materials

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Abstract
Sorptivity describes the pore connectivity of cementitious materials. This property is widely used for the assessment of the resistance of concrete to the ingress of aggressive agents. However, anomalous behaviour of cementitious materials during water uptake is usually reported. This is possibly explained by the effect of the hygroscopic nature of cementitious materials on the dynamics of the process. Water affinity of C-S-H might turn it into an imbibant and cause swelling as the material is exposed to water. Development of swelling can cause a variable hydraulic diffusivity of the material with time, and this is consistent with the deviation from the progress of the water uptake with the square root of time in the short term usually reported in the literature for the particular case of cementitious materials. This paper provides experimental results in support of the occurrence of swelling during water uptake in mortar samples. Consequently, the term capillary imbibition instead of capillary absorption seems more appropriate for describing the water uptake by capillarity of cementitious materials, as imbibition is usually connected to swelling. The idea of cementitious materials as rigid materials during water uptake seems incomplete for a complete description of the process.

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Chicago
Alderete, Natalia Mariel, Yury A. Villagran Zaccardi, and Nele De Belie. 2018. “Experimental Indication of Imbibition During Capillary Water Uptake in Cementitious Materials.” In 4th International Conference on Service Life Design for Infrastructures (SLD4), ed. Guang Ye, Yong Yuan, Claudia Romero Rodriguez, and Hongzhi Zhang, RILEM PRO 125:231–236. Paris: RILEM Publications.
APA
Alderete, N. M., Villagran Zaccardi, Y. A., & De Belie, N. (2018). Experimental indication of imbibition during capillary water uptake in cementitious materials. In G. Ye, Y. Yuan, C. Romero Rodriguez, & H. Zhang (Eds.), 4th International Conference on Service Life Design for Infrastructures (SLD4) (Vol. RILEM PRO 125, pp. 231–236). Presented at the 4th International Conference on Service Life Design for Infrastructures (SLD4), Paris: RILEM Publications.
Vancouver
1.
Alderete NM, Villagran Zaccardi YA, De Belie N. Experimental indication of imbibition during capillary water uptake in cementitious materials. In: Ye G, Yuan Y, Romero Rodriguez C, Zhang H, editors. 4th International Conference on Service Life Design for Infrastructures (SLD4). Paris: RILEM Publications; 2018. p. 231–6.
MLA
Alderete, Natalia Mariel, Yury A. Villagran Zaccardi, and Nele De Belie. “Experimental Indication of Imbibition During Capillary Water Uptake in Cementitious Materials.” 4th International Conference on Service Life Design for Infrastructures (SLD4). Ed. Guang Ye et al. RILEM PRO 125. Paris: RILEM Publications, 2018. 231–236. Print.
@inproceedings{8598925,
  abstract     = {Sorptivity describes the pore connectivity of cementitious materials. This property is
widely used for the assessment of the resistance of concrete to the ingress of aggressive
agents. However, anomalous behaviour of cementitious materials during water uptake is
usually reported. This is possibly explained by the effect of the hygroscopic nature of
cementitious materials on the dynamics of the process. Water affinity of C-S-H might turn it
into an imbibant and cause swelling as the material is exposed to water. Development of
swelling can cause a variable hydraulic diffusivity of the material with time, and this is
consistent with the deviation from the progress of the water uptake with the square root of
time in the short term usually reported in the literature for the particular case of cementitious
materials. This paper provides experimental results in support of the occurrence of swelling
during water uptake in mortar samples. Consequently, the term capillary imbibition instead of
capillary absorption seems more appropriate for describing the water uptake by capillarity of
cementitious materials, as imbibition is usually connected to swelling. The idea of
cementitious materials as rigid materials during water uptake seems incomplete for a
complete description of the process.},
  author       = {Alderete, Natalia Mariel and Villagran Zaccardi, Yury A. and De Belie, Nele},
  booktitle    = {4th International Conference on Service Life Design for Infrastructures (SLD4)},
  editor       = {Ye, Guang and Yuan, Yong and Romero Rodriguez, Claudia and Zhang, Hongzhi},
  isbn         = {9782351582138},
  language     = {eng},
  location     = {Delft, Netherlands },
  pages        = {231--236},
  publisher    = {RILEM Publications},
  title        = {Experimental indication of imbibition during capillary water uptake in cementitious materials},
  volume       = {RILEM PRO 125},
  year         = {2018},
}