Mechanical Behavior of Hardened Printed Concrete and the Effect of Cold Joints
Author Information
Author(s): Glotz Theresa, Rasehorn Inken Jette, Petryna Yuri
Primary Institution: Technische Universität Berlin
Hypothesis
This study investigates the influence of interlayer orientation and the presence of cold joints on the mechanical properties of hardened printed concrete.
Conclusion
The study found that layer orientation significantly affects the mechanical properties of printed concrete, with cold joints influencing crack development.
Supporting Evidence
- Specimens with interlayers aligned parallel to the loading direction exhibit significantly inferior mechanical properties compared to other orientations.
- The presence of cold joints considerably influences the progression of crack formation.
- Statistically significant differences in mechanical properties were observed based on layer orientation.
Takeaway
This study looks at how the way concrete is printed affects its strength and how cracks form, especially when there are gaps between the layers.
Methodology
The study used three-point bending tests and optical measurement techniques to analyze the mechanical properties of printed concrete specimens with different layer orientations and cold joints.
Limitations
The study's findings are based on a limited number of specimens and may not fully represent all possible configurations of printed concrete.
Statistical Information
P-Value
p=0.0227 for Fcr,norm and p=0.0020 for βF
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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