Experience in Online Modification of Rheology and Strength Acquisition of 3D Printable Mortars

Criteria development for sustainable construction manufacturing in Construction Industry 4.0

“…Many recent studies have recommended this technology to be used for larger-scale production in construction (Tay et al, 2017) and also suggested as one of required technologies of Construction Industry 4.0 (Dilberoglu et al, 2017;Tjahjono et al, 2017;Cakmakci, 2019;Schmidt et al, 2019;Sheladiya et al, 2019). Recent literature introduced several innovative concepts and 3DPs such as CONPrint3D (Mechtcherine et al, 2019) and HINDCON (Hybrid INDustrial CONstruction) (Esnault et al, 2019). At the same time, some others suggested this technology can significantly improve sustainability in construction by the use of recycled waste materials and increase net saving (Tay et al, 2017).…”

“…The papers showed a successful practice; however, the barrier of size rate of the 3DP to the building object still remains as the main barrier of 3DSP adoption. While technology adoption is investigated as series of activities taken by an organisation to make a decision to use a new technology (Sepasgozar et al, 2016;Sepasgozar and Davis, 2018;Sepasgozar et al, 2018aSepasgozar et al, , 2018b, specific barriers of 3DP adoption are also discussed in the literature (Buswell et al, 2018;Esnault et al, 2019). Motion planning is another major barrier of 3DSP is programming the machine in an efficient way.…”

3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

“…These voids would have a significant effect on flexural strength after the hardening of concrete [ 60 ]. Esnault et al [ 89 ] introduced a different approach to reducing the extrudability requirements of concrete. Their method involves the use of fluid concrete to reduce the pumping pressure requirements and the addition of appropriate accelerator dosage at the nozzle part of the printer to accelerate the structuration of concrete and enable it to sustain self-load.…”

Computational and empirical modeling of additive manufacturing processes

“…Cement-based materials used in AM applications are subject to a complex set of technical requirements; the most important of these requirements are based on the workability of the materials [223]. Workability is a measure of how easy or difficult it is to place, consolidate, and finish a concrete mix [269].…”

“…In the work of Gosselin et al [222], a procedure that enables the modification of the material properties of the mix along its way to the nozzle is presented. The same technique is investigated by Esnault et al [223], in which a special additive is injected to the mix before it reaches the nozzle that leads to an increase in its viscosity. This technique improves both the printability of concrete materials, while simultaneously enabling them to retain their cohesion, which is an important challenge in cement-based AM [224].…”