Time gap effect on bond strength of 3D-printed concrete

By Y. Tay, G. Ting, Ye Qian, Biranchi Narayan Panda, Lewei He, M. Tan. Virtual and Physical Prototyping, 2018

267 citations recorded by the source corpus.

ABSTRACT An advancing technology that combines the concrete extrusion with a motion control to create structures with complex geometrical shapes without the need for formwork is known as 3D concrete printing. Since this technique prints layer by layer, the time taken to reach the same position in the subsequent layer is important as it will create an anisotropic property that has a weaker tensile strength at the bond interface of the two printed filaments. Through rheological measurement, which reveals the material deformation and flow behaviour, it is possible to examine the material structural build-up due to time-gap effect by measuring at different time delay. This paper focuses on investigating the time-gap effect on the printed filament with rheological and observation at macroscopic-scale to understand the material behaviour of the initial and subsequent printed layer during its fresh phase. Rheological experiment findings reveal that the tensile strength of the printed specimen is correlated to the material modulus at the initial layer.

Subfields: Automotive Engineering, Building and Construction

View Paper: https://www.semanticscholar.org/paper/a957dafda9b2487498eefbbd0a9f588fd6294b20

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Citations in the corpus

Improving printability of limestone-calcined clay-based cementitious materials by using viscosity-modifying admixture (2020, background): “Many studies [54,61,73,74] have already reported the reduction of interlayer strength due to the prolonged time gap.”
Effect of printing parameters on interlayer bond strength of 3D printed limestone-calcined clay-based cementitious materials: An experimental and numerical study (2020, methodology): “[31] provided a good example for determining the tensile bond strength between two layers with short-time intervals ranging from 1 min to 20 min by using a direct tensile test.”