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CFD implementation of time-dependent behaviour : application for concrete pumping

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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
De Schryver, Robin, Khadija El Cheikh, Karel Lesage, and Geert De Schutter. 2018. “CFD Implementation of Time-dependent Behaviour : Application for Concrete Pumping.” In Symposium on Concrete Modelling (CONMOD2018), ed. Erik Schlangen, Geert De Schutter, Branko Savija, Hongzhi Zhang, and Claudia Romero Rodriguez, RILEM PRO 127:122–130. Paris: RILEM Publications.
APA
De Schryver, R., El Cheikh, K., Lesage, K., & De Schutter, G. (2018). CFD implementation of time-dependent behaviour : application for concrete pumping. In E. Schlangen, G. De Schutter, B. Savija, H. Zhang, & C. Romero Rodriguez (Eds.), Symposium on Concrete Modelling (CONMOD2018) (Vol. RILEM PRO 127, pp. 122–130). Presented at the Symposium on Concrete Modelling (CONMOD2018), Paris: RILEM Publications.
Vancouver
1.
De Schryver R, El Cheikh K, Lesage K, De Schutter G. CFD implementation of time-dependent behaviour : application for concrete pumping. In: Schlangen E, De Schutter G, Savija B, Zhang H, Romero Rodriguez C, editors. Symposium on Concrete Modelling (CONMOD2018). Paris: RILEM Publications; 2018. p. 122–30.
MLA
De Schryver, Robin et al. “CFD Implementation of Time-dependent Behaviour : Application for Concrete Pumping.” Symposium on Concrete Modelling (CONMOD2018). Ed. Erik Schlangen et al. RILEM PRO 127. Paris: RILEM Publications, 2018. 122–130. Print.
@inproceedings{8598927,
  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       = {De Schryver, Robin and El Cheikh, Khadija and Lesage, Karel and De Schutter, Geert},
  booktitle    = {Symposium on Concrete Modelling (CONMOD2018)},
  editor       = {Schlangen, Erik and De Schutter, Geert and Savija, Branko and Zhang, Hongzhi and Romero Rodriguez, Claudia},
  isbn         = {9782351582169},
  language     = {eng},
  location     = {Delft, Netherlands },
  pages        = {122--130},
  publisher    = {RILEM Publications},
  title        = {CFD implementation of time-dependent behaviour : application for concrete pumping},
  volume       = {RILEM PRO 127},
  year         = {2018},
}