A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of testing procedures on buildability properties of 3D-printable concrete
https://orcid.org/0000-0002-5691-0113
Highlights The concrete age affects the early-age mechanical response. Referred to the reference mix, varying the quantity of superplasticizer appeared to lower the strengths and the stiffness of the sample, increasing the experimental scatter. The use of an external membrane improved the repeatability of the test, and the failure prediction was more reliable. The displacement rate affects the stress-strain response at different concrete ages. The overall effect of the various testing procedures may lead to a failure prediction variability in the range of 30–40%.
Abstract Digital fabrication with concrete enables the efficient and quick creation of architectural/structural elements without formworks. This technology does, however, introduce new challenges, especially concerning the mechanical requirements of printable materials. Consequently, the mechanical characterisation of early-age printable mortar is essential for designing, controlling and modelling the printing process, but no standardised testing procedures are currently available. In this paper, the results of uniaxial compressive tests performed on cylindrical samples are compared by varying the testing procedures, with the ultimate goal being to investigate their effect on the time-dependent mechanical properties of printable mortar. Finally, the results are used to predict failure during the printing process due to self-buckling or excessive compression on the first mortar layer. The outcomes highlight the role of specimen preparation, as well as the displacement rate on the predicted critical number of layers.
Effect of testing procedures on buildability properties of 3D-printable concrete
https://orcid.org/0000-0002-5691-0113
Highlights The concrete age affects the early-age mechanical response. Referred to the reference mix, varying the quantity of superplasticizer appeared to lower the strengths and the stiffness of the sample, increasing the experimental scatter. The use of an external membrane improved the repeatability of the test, and the failure prediction was more reliable. The displacement rate affects the stress-strain response at different concrete ages. The overall effect of the various testing procedures may lead to a failure prediction variability in the range of 30–40%.
Abstract Digital fabrication with concrete enables the efficient and quick creation of architectural/structural elements without formworks. This technology does, however, introduce new challenges, especially concerning the mechanical requirements of printable materials. Consequently, the mechanical characterisation of early-age printable mortar is essential for designing, controlling and modelling the printing process, but no standardised testing procedures are currently available. In this paper, the results of uniaxial compressive tests performed on cylindrical samples are compared by varying the testing procedures, with the ultimate goal being to investigate their effect on the time-dependent mechanical properties of printable mortar. Finally, the results are used to predict failure during the printing process due to self-buckling or excessive compression on the first mortar layer. The outcomes highlight the role of specimen preparation, as well as the displacement rate on the predicted critical number of layers.
Effect of testing procedures on buildability properties of 3D-printable concrete
https://orcid.org/0000-0002-5691-0113
Highlights The concrete age affects the early-age mechanical response. Referred to the reference mix, varying the quantity of superplasticizer appeared to lower the strengths and the stiffness of the sample, increasing the experimental scatter. The use of an external membrane improved the repeatability of the test, and the failure prediction was more reliable. The displacement rate affects the stress-strain response at different concrete ages. The overall effect of the various testing procedures may lead to a failure prediction variability in the range of 30–40%.
Abstract Digital fabrication with concrete enables the efficient and quick creation of architectural/structural elements without formworks. This technology does, however, introduce new challenges, especially concerning the mechanical requirements of printable materials. Consequently, the mechanical characterisation of early-age printable mortar is essential for designing, controlling and modelling the printing process, but no standardised testing procedures are currently available. In this paper, the results of uniaxial compressive tests performed on cylindrical samples are compared by varying the testing procedures, with the ultimate goal being to investigate their effect on the time-dependent mechanical properties of printable mortar. Finally, the results are used to predict failure during the printing process due to self-buckling or excessive compression on the first mortar layer. The outcomes highlight the role of specimen preparation, as well as the displacement rate on the predicted critical number of layers.
Effect of testing procedures on buildability properties of 3D-printable concrete
Casagrande, Lorenzo (author) / Esposito, Laura (author) / Menna, Costantino (author) / Asprone, Domenico (author) / Auricchio, Ferdinando (author)
2020-01-25
Article (Journal)
Electronic Resource
English
Enhancing Buildability of 3D Printable Concrete by Spraying of Accelerating Admixture on Surface
| Springer Verlag | 2020
| UB Braunschweig | 1989