3D printable strain hardening cementitious composites (3DP-SHCC), tailoring fresh and hardened state properties

van Overmeir, A.L.; Šavija, B.; Bos, F.P.; Schlangen, E.

doi:10.1016/j.conbuildmat.2023.132924

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…This small increase in compressive strength between cast and printed composites is commonly encountered in the context of 3DP-SHCC, as documented in previous research [8,9,11,19,21,49]. However, these outcomes are in contrast with the prevailing consensus for "plain" printable mortars, for which it is often reported that printed specimens exhibit reduced compressive strength compared to their cast counterparts [14,15,18].…”

Section: Compression Testsupporting

confidence: 51%

“…For this study, we used Mix D, which was developed previously by van Overmeir et al [19]. The mix is composed of the following raw materials: CEM I 42.5 N, silica fume (SF), blast furnace slag (BFS), limestone powder (LS), river sand (Sand), superplasticiser (SP), and viscosity modifying agent (VMA).…”

Section: Methodsmentioning

confidence: 99%

“…For materials with deflection hardening, the flexural toughness signifies the deformation energy (J) stored within the test volume of the specimen (m 3 ). The flexural toughness is quantified by the area underneath the load-deflection (N*mm) curve [19,47]. The load was normalised for the standard specimen test volume of (30 × 8 × 120 m 3 (bxhxl)).…”

Section: Four-point Bending Testmentioning

confidence: 99%

“…These differences seem to be even more pronounced when using SHCC for 3D concrete printing, as multiple researchers have reported high deviations in flexural and tensile deformation capacity between cast and printed specimens [9,11,[19][20][21], with reductions of 25% to 38% in tensile strain capacity.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of 3D Concrete Printing Phases on the Mechanical Performance of Printable Strain-Hardening Cementitious Composites

van Overmeir,

Šavija,

Bos

et al. 2023

Buildings

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Several studies have shown the potential of strain-hardening cementitious composites (SHCC) as a self-reinforcing printable mortar. However, papers published on the development of three-dimensional printable SHCC (3DP-SHCC) often report a discrepancy between the mechanical properties of the cast and printed specimens. This paper evaluates the effect of each successive phase of the printing process on the mechanical properties of the composite. To this end, materials were collected at three different stages in the printing process, i.e., after each of mixing, pumping, and extruding. The collected 3DP-SHCC materials were then cast in specimen moulds and their mechanical properties after curing were obtained. The resulting findings were juxtaposed with the mechanical properties of the specimens derived from a fully printed 3DP-SHCC element, and our findings indicate that while the density and the compressive strength are not significantly influenced by the printing process, the flexural and tensile strength, along with their associated deflection and strain, are strongly affected. Additionally, this research identifies the pumping phase as the primary phase influencing the mechanical properties during the printing process.

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