Hydration and rheology control of concrete for digital fabrication: Potential admixtures and cement chemistry

By D. Marchon, S. Kawashima, H. Bessaies-Bey, S. Mantellato, S. Ng. Cement and Concrete Research, 2018

433 citations recorded by the source corpus.

Abstract Concrete digital fabrication is an innovative construction approach where infrastructural elements can be built additively without using formwork. This represents a significant advantage, but also introduces materials engineering challenges, as the requirements normally fulfilled by the formwork are now imposed on the concrete. In this paper, it is discussed how admixtures can be employed to achieve the rheological and hydration properties necessary for printable concrete. An overview of various admixtures currently implemented in standard practice is presented. Then, the main required concrete states for extrusion and deposition processes are analyzed with respect to required performances and potential admixtures. Finally, possible side effects and incompatibilities are discussed, as well as how they could be unconventionally used for printable concrete purposes. The main objective is to demonstrate how admixtures will be critical in the development of concrete systems to realize digital fabrication, and to ultimately motivate investigation in the key areas discussed.

Subfields: Automotive Engineering, Building and Construction

View Paper: https://www.semanticscholar.org/paper/050ddc25d4f0d92270bd798065d9083714cb7cec

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Citations in the corpus

Advances in characterizing and understanding the microstructure of cementitious materials (2019, background): “…the interaction between PCEs and ettringite precipitation occurs during the first minutes of hydration, the main consequences of the modification brought by the polymer have a negative influence on the rheological properties of the concrete and perturb the hydration kinetics [19,132,180–182].”
Improving printability of limestone-calcined clay-based cementitious materials by using viscosity-modifying admixture (2020, background): “Furthermore, admixtures, such as superplasticizers, viscosity modifiers, and accelerators, could be employed to tailor the rheological performance [36].”
3D printing using concrete extrusion: A roadmap for research (2018, background): “[50]discuss these issues in greater detail this issue.”