Role of temperature in 3D printed geopolymers: Evaluating rheology and buildability

Souza, Marcelo Tramontin; Simão, Lisandro; Moraes, Elisângela Guzi de; Senff, L.; Pessôa, José Renato de Castro; Ribeiro, M.J.; Oliveira, Antônio Pedro Novaes de

doi:10.1016/j.matlet.2021.129680

Cited by 27 publications

(14 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Romagnoli et al., 22 however, focused their experimental evaluations on, once again, a narrow temperature range, this time of 20°C–35°C, not fully exploring the influence of shearing time in combination with temperature. Lastly, Souza et al 23 . determined the advantages of preheating geopolymers before extrusion, obtaining more favorable buildability and extrudability 23 .…”

Section: Introductionmentioning

confidence: 99%

“…Lastly, Souza et al 23 . determined the advantages of preheating geopolymers before extrusion, obtaining more favorable buildability and extrudability 23 . However, it is worth noting that their research only involved heating the samples at 50°C, which is on the upper end of reasonable terrestrial printing temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Romagnoli et al, 22 however, focused their experimental evaluations on, once again, a narrow temperature range, this time of 20 • C-35 • C, not fully exploring the influence of shearing time in combination with temperature. Lastly, Souza et al 23 determined the advantages of preheating geopolymers before extrusion, obtaining more favorable buildability and extrudability. 23 However, it is worth noting that their research only involved heating the samples at 50 • C, which is on the upper end of reasonable terrestrial printing temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Lastly, Souza et al 23 determined the advantages of preheating geopolymers before extrusion, obtaining more favorable buildability and extrudability. 23 However, it is worth noting that their research only involved heating the samples at 50 • C, which is on the upper end of reasonable terrestrial printing temperatures. It is advantageous to have a full understanding of the influence of temperature on rheological properties as a function of temperature and shear time for large-scale 3D printing, likely to be conducted in non-temperature-controlled environments, which may impact viable printing times.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of temperature on rheological properties during early‐stage geopolymerization

Brandvold,

Kriven

2023

J Am Ceram Soc.

View full text Add to dashboard Cite

Metakaolin geopolymers have gained much interest as a large‐scale, 3D printable material. It is well known that increasing temperature can expedite the geopolymerization reaction, but little is known about how the temperature variability of the printing environment can influence the rheology of fresh geopolymer pastes. In this study, the influence of temperature on the viscosity of potassium geopolymer pastes was investigated under constant shearing at rates of 25, 50, or 100 s−1, yield stress measurements, and oscillatory motion. The temperature range examined was 5°C–55°C, in systematic 5°C increments. It was found that temperatures above 30°C resulted in lower starting viscosities compared to colder temperatures, but eventually exhibited an exponential increase in viscosity as the geopolymerization chemical reaction became dominate. In addition, a higher shear rate delayed, but did not stop, the exponential increase in viscosity from occurring. Yield stress values also reflected an upward trend with increasing temperatures after a 30‐min temperature soak. Lastly, oscillatory measurements indicated that viable printing times for 50°C or above were as little as 50–60 min total and were compared to Vicat needle testing. Overall, the influence of temperature on rheological properties could be used to manipulate the geopolymer viscosity for optimum printing conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of temperature on rheological properties during early‐stage geopolymerization

Brandvold,

Kriven

2023

J Am Ceram Soc.

View full text Add to dashboard Cite

show abstract

“…17,18 The superplasticizers are used to improve workability, and retarders are used to increase open time. 17,18 Le et al 19 used 1% superplasticiser and 0.5% retarder to the mix and achieved an optimal workability (0.55 kPa shear strength), and an optimal open time (up to 100 min), respectively. 19 Kazemian et al observed that using polycarboxylate-based high-range water-reducing admixture helped to achieve the requisite flowability and viscosity modifying admixture boosted the plasticity and cohesion of mix.…”

Section: Introductionmentioning

confidence: 99%

3D printable concrete without chemical admixtures: Fresh and hardened properties

Ingle,

Kaliyavaradhan,

Ambily

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

There are several significant advantages to 3D concrete printing (3DCP) over conventional concreting techniques. Structures are built by printing them one layer at a time. This study aimed to improve the usability and accessibility of this technology to solve on‐site issues, such as those caused by chemical admixture. In order to construct concrete that can be printed in three dimensions, researchers added many chemical admixtures in controlled quantities. This experiment's main goals were to prepare 3D printable concrete (3DPC) without chemical admixture and to evaluate fresh and hardened properties. Slump, flow, extrudability, buildability, open time, and penetrometer tests were carried out for fresh properties. Compressive, flexural, splitting tensile strength, and modulus of elasticity were evaluated for hardened properties. The printed specimens in the longitudinal direction exhibited higher compressive strength than in the downward and lateral directions. Similarly, higher flexural and splitting tensile strength in the longitudinal direction of printed specimens than in the downward and lateral direction. The results of developing 3DPC without chemical admixtures demonstrated good performance in fresh and hardened properties.

show abstract

Additive Manufacturing for Building and Constructions

Kakarla,

Kong,

Patel

2024

Additive Manufacturing With Novel Materials

View full text Add to dashboard Cite

Role of temperature in 3D printed geopolymers: Evaluating rheology and buildability

Cited by 27 publications

References 9 publications

Influence of temperature on rheological properties during early‐stage geopolymerization

Influence of temperature on rheological properties during early‐stage geopolymerization

3D printable concrete without chemical admixtures: Fresh and hardened properties

Additive Manufacturing for Building and Constructions

Contact Info

Product

Resources

About