Print Email Facebook Twitter Effect of curing methods during a long time gap between two printing sessions on the interlayer bonding of 3D printed cementitious materials Title Effect of curing methods during a long time gap between two printing sessions on the interlayer bonding of 3D printed cementitious materials Author Chen, Y. (TU Delft Materials and Environment) Chang, Z. (TU Delft Materials and Environment) He, S. (TU Delft Materials and Environment) Copuroglu, Oguzhan (TU Delft Materials and Environment) Šavija, B. (TU Delft Materials and Environment) Schlangen, E. (TU Delft Materials and Environment) Date 2022 Abstract A good bond between the layers of 3D printed cementitious materials is a prerequisite for having high structural rigidity for the printed elements. However, the influence of printing process on an interlayer bond is still not well understood. This study investigates the influence of curing methods (i.e., air curing, plastic film covering, wet towel covering and water mist-30 min/-60 min) on the interlayer bonding characteristics of 3D printed cementitious materials for a long time interval between two printing sessions. Results showed that the interlayer bonding could be improved by covering the substrate with a plastic film or a wet towel. However, applying water mist every 60 min/30 min on the deposited layer was detrimental to the interlayer bonding. Furthermore, the interlayer bond strength of studied specimens appeared to be dominated by the mechanical strength of the cementitious matrix at the interface rather than its air void structure. Therefore, covering unfinished printed elements with plastic film or wet towels can be a practical solution to maintain a sufficiently humid environment during long waiting periods, which is vital for its interlayer adhesion. Subject 3D concrete printingCuring methodsInterlayer bond strengthLong time intervalsMicrostructure To reference this document use: http://resolver.tudelft.nl/uuid:9af7d90e-cbe5-4d45-b538-42e4af78d7ff DOI https://doi.org/10.1016/j.conbuildmat.2022.127394 ISSN 0950-0618 Source Construction and Building Materials, 332, 1-18 Part of collection Institutional Repository Document type journal article Rights © 2022 Y. Chen, Z. Chang, S. He, Oguzhan Copuroglu, B. Šavija, E. Schlangen Files PDF 1_s2.0_S0950061822010716_main.pdf 22.48 MB Close viewer /islandora/object/uuid:9af7d90e-cbe5-4d45-b538-42e4af78d7ff/datastream/OBJ/view