3D printable lightweight cementitious composites with incorporated waste glass aggregates and expanded microspheres – Rheological, thermal and mechanical properties

Cuevas, Karla; Chougan, Mehdi; Martin, Falk; Ghaffar, Seyed Hamidreza; Stephan, Dietmar; Sikora, Paweł

doi:10.1016/j.jobe.2021.102718

Cited by 50 publications

(21 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Moreover, Craveiro et al [33] experimentally analyzed the structural and thermal performances of several printable materials, including normal concrete, concrete mixed with cork, and concrete mix with expanded clay. Furthermore, Cuevas et al [16] developed a 3D-printed lightweight concrete mixture with waste glass as an aggregate with lower density, and achieved a 40% reduction in thermal conductivity. Al-Ghamdi [7] conducted a detailed experimental study to examine the effects of different printing parameters to lower the energy consumption and printing period, and to ensure lightweight construction of acrylonitrile butadiene styrene (ABS) components through extrusion-based 3D printing.…”

Section: Energy Efficiency Of 3d-printed Concrete Structuresmentioning

confidence: 99%

“…In addition to conventional building components, entirely unique and complex configurations, which are not viable with conventional formwork, can be constructed using 3DPC [10,[12][13][14][15]. In addition, 3DPC provides lesser self-weight structures with topology optimization, and further reduction of weight and enhanced thermal insulation properties could be achieved by developing mix designs using materials with low thermal conductivity [16,17]. While 3DPC is regarded as a revolutionizing and innovative manufacturing technology, the creative conception and application of such a technology is still underexplored.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy Performance of 3D-Printed Concrete Walls: A Numerical Study

et al. 2021

View full text Add to dashboard Cite

Three-dimensional-printed concrete (3DPC), which is also termed as digital fabrication of concrete, offers potential development towards a sustainable built environment. This novel technique clearly reveals its development towards construction application with various global achievements, including structures such as bridges, houses, office buildings, and emergency shelters. However, despite the enormous efforts of academia and industry in the recent past, the application of the 3DPC method is still challenging, as existing knowledge about its performance is limited. The construction industry and building sectors have a significant share of the total energy consumed globally, and building thermal efficiency has become one of the main driving forces within the industry. Hence, it is important to study the thermal energy performance of the structures developed using the innovative 3DPC technique. Thermal characterization of walls is fundamental for the assessment of the energy performance, and thermal insulation plays an important role in performance enhancements. Therefore, in this study, different wall configurations were examined, and the conclusions were drawn based on their relative energy performance. The thermal performance of 32 different 3DPC wall configurations with and without cavity insulation were traced using validated finite element models by measuring the thermal transmittance value (U-value). Our study found that the considered 3DPC cavity walls had a low energy performance, as the U-values did not satisfy the standard regulations. Thus, their performance was improved with cavity insulation. The simulation resulted in a minimum thermal transmittance value of 0.34 W/m2·K. Additionally, a suitable equation was proposed to find the U-values of 100 mm-thick cavity wall panels with different configurations. Furthermore, this study highlights the importance of analytical and experimental solutions as an outline for further research

show abstract

Section: Energy Efficiency Of 3d-printed Concrete Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy Performance of 3D-Printed Concrete Walls: A Numerical Study

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The study assumes a constant slump flow of 160 ± 10 mm at 15 min after adding the water, as shown in standard [ 50 ]. This is one of the basic criteria for printed mixes (proposed in other studies [ 6 , 13 , 14 , 32 , 51 , 52 ]. In addition, each mix was pumped through the printing system and then printed, confirming its suitability for the task ( Section 3.1 ).…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…Another very important factor for both printed and ordinary concretes is environmental impact [ 24 , 25 , 26 , 27 , 28 ]. The mixes used for 3D printing usually contain large amounts of binder [ 1 , 29 , 30 , 31 , 32 ]. In general, the concrete industry consumes huge amounts of sand and gravel per year.…”

Section: Introductionmentioning

confidence: 99%

Early-Age Mechanical Properties of 3D-Printed Mortar with Spent Garnet

et al. 2021

View full text Add to dashboard Cite

This study determines the effect of spent garnet as a replacement for natural sand in 3D-printed mortar at early ages. Five mixes with different spent garnet amounts were prepared (0%, 25%, 50%, 75% and 100% by volume). The ratio of binder to aggregate remained unchanged. In all mixes the water/binder ratio was assumed as a constant value of 0.375. Tests were performed to confirm the printability of the mix (a path quality test using a gantry robot with an extruder). Determinations of key buildability properties of the mix (green strength and Young’s Modulus) during uniaxial compressive strength at 15 min, 30 min and 45 min after adding water were conducted. A hydraulic press and the GOM ARAMIS precision image analysis system were used to conduct the study. The results showed that an increase in spent garnet content caused a decrease in green strength and Young’s Modulus (up to 69.91% and 80.37%, respectively). It was found that to maintain proper buildability, the recommended maximum replacement rate of natural sand with garnet is 50%. This research contributes new knowledge in terms of using recycled waste in the 3D printing technology of cementitious materials.

show abstract

“…Further increase in the amount of lightweight aggregate caused segregation during concrete extrusion. Cuevas et al [153] produced lightweight printable concrete mixtures by using waste glass and expanded thermoplastic microspheres. The addition of waste glass aggregate resulted in reduced setting time at earlier ages and decreased thermal conductivity in hardened printed composites.…”

Section: Aggregatementioning

confidence: 99%

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

2021

View full text Add to dashboard Cite

This paper provides a state-of-the-art report on the up-to-date research on the emerging 3D concrete printing technology from the concrete materials perspective. It reviews the recent research focused on understanding and characterizing the rheological necessities of the concrete printing process and discusses how the researchers are tailoring compatible mix proportions for the 3D concrete printing process by using eco-friendly binders, waste aggregates, chemical admixtures, and nano-additives. This paper systematically evaluates anisotropic behavior in the mechanical properties of printed concrete and establishes an order for anisotropic behavior in the compressive, flexural, and tensile strengths along three different axes (X, Y, and Z axes) of printed concrete. It evaluates the ratio of flexural strength to the compressive strength of printed concrete along the above three axes. This article explains the influence of variation of printing process parameters on the mechanical properties and discusses reinforcement approaches used for increasing structural performance. The microstructure at the interface of adjacent layers and also at the interface of the reinforcement-cement matrix is discussed. The recent research on the durability performance of printed concrete is critically discussed and future research needs for 3D concrete printing are identified in this paper.

show abstract

3D printable lightweight cementitious composites with incorporated waste glass aggregates and expanded microspheres – Rheological, thermal and mechanical properties

Cited by 50 publications

References 65 publications

Energy Performance of 3D-Printed Concrete Walls: A Numerical Study

Energy Performance of 3D-Printed Concrete Walls: A Numerical Study

Early-Age Mechanical Properties of 3D-Printed Mortar with Spent Garnet

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

Contact Info

Product

Resources

About