Rheological parameters and building time of 3D printing sulphoaluminate cement paste modified by retarder and diatomite

Chen, Mingxu; Li, Laibo; Wang, Jiaao; Huang, Yongbo; Wang, Shoude; Zhao, Piqi; Lu, Lingchao; Cheng, Xin

doi:10.1016/j.conbuildmat.2019.117391

Cited by 82 publications

(16 citation statements)

References 38 publications

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“…For the same matrix system with similar HPMC-and PCEcontents, a prolongation of the setting time was achieved applying tartaric acid without compromising clearly the mechanical properties of 3D-printed specimen (Chen et al 2018a). The reduction in the mechanical properties was more obvious using boric acid or sodium gluconate (Chen et al 2020a). However, this could be compromised or even significantly improved by applying additional diatomite to the SAC pastes (Fig.…”

Section: Polymeric Admixtures In 3d Printable Cementitious Matricesmentioning

confidence: 93%

“…13 3D-printed SAC pastes with different dosages of boric acid (BA), sodium gluconate (SG) and diatomite. Reprinted from Chen et al (2020a), with permission of Elsevier, 2020 most effective ones. Wang et al (2020) investigated polymer-modified mortars as interlayer reinforcement materials and found a superior interlayer bonding for the epoxybased system compared to the chloroprene latex-mixtures.…”

Section: Polymeric Admixtures In 3d Printable Cementitious Matricesmentioning

confidence: 99%

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The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

et al. 2021

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Additive manufacturing (AM), also referred as 3D printing, is a technology that enables building automated three-dimensional objects in a layer-by-layer manner. AM of cement-based and alkali-activated composites has gathered attention over the last decade and is one of the most rapidly developing civil engineering fields. Development of proper mixture compositions which are suitable in fresh and hardened state is one of the key challenges of AM technology in construction. As the behaviour of cement-based materials (CBM) and alkali-activated materials (AAM) is determined by chemical and physical processes at the nano-level, incorporation of nano- and micro-sized admixtures has great influence on the performance of printable composites. These modifications are attributed to the unique reactivity of nanoparticles associated with their small size and large surface area. This review paper summarizes recent developments in the application of nano- and micro-particles on 3D printable cementitious composites and how they influence the performance of 3D-printed construction materials. The research progress on nano-engineered CBM and AAM is reviewed from the view of fresh and hardened properties. Moreover, comparison between nano- and micro-sized admixtures including nanosilica, graphene-based materials, and clay nanoparticles as well as chemical admixtures such as viscosity-modifying admixtures and superplasticizers is presented. Finally, the existing problems in current research and future perspectives are summarized. This review provides useful recommendations toward the significant influence of nano- and micro-sized admixtures on the performance of 3D printable CBMs.

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Section: Polymeric Admixtures In 3d Printable Cementitious Matricesmentioning

confidence: 93%

Section: Polymeric Admixtures In 3d Printable Cementitious Matricesmentioning

confidence: 99%

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

et al. 2021

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“…On the contrary, if stiff concrete with high yield stress and viscosity is used for attaining shape retention and high buildability, then it will increase the required pumping power, and extrusion through the nozzle will be difficult [ 49 ]. Table 1 summarizes the range of static yield stress, and Table 2 summarizes the range of dynamic yield stress and plastic viscosity values for various printable concrete mixes reported in the literature [ 29 , 36 , 38 , 40 , 44 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ]. Table 1 shows that reported values of static yield stress for printable mixes lie as low as 0.16 kPa for calcium sulfoaluminate cement paste ink [ 54 ] and as high as 6.8 kPa for stiff mixes of nano-clay containing high volume fly ash mortar [ 56 ].…”

Section: Rheologymentioning

confidence: 99%

“… A comparison of rheographs of 3D-printable concrete and self-compacting concrete (SCC) [ 44 , 54 , 58 , 60 , 61 , 62 , 67 , 68 , 69 , 70 , 71 , 72 ]. …”

Section: Figurementioning

confidence: 99%

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

2021

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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.

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“…These latter are used for structural features or as decorative utensils alike. Currently, the construction industries are also more and more interested by 3D printing since it will permit to include oriented mechanical properties and complex geometries [6][7][8].…”

Section: Introduction and Contextmentioning

confidence: 99%

Skeleton Based Perpendicularly Scanning - A New Scanning Strategy for Additive Manufacturing: Modeling and Optimization

Jai

Akhrif

Saidou

2020

Preprint

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In this paper, the authors propose a novel strategy of 2D scanning that might be adapted for any additive manufacturing process. The featured novelty corresponds to a Skeleton Based Perpendicularly (SBP) of the 2D shape of each slice. Thus, it is proposed to minimize the total production time of a given layer under some constraints. In other word, it is proposed to study the competitiveness conditions of the new scanning technique regarding the classical chess scanning strategy from a productivity perspective. In order to introduce this new technique, the paper treats the case of a rectangular layer. The competitiveness of the proposed technique was discussed according to chess decomposition parameters, the hatch space distance, and the dimensions of the primitive rectangle layer to analyze. The indicators introduced corresponds to “the gain of production time” and “the specific gain of production time per surface unit”; then, these latter were computed and discussed in two separated cases of study. The findings show that, by the adoption of the SBP technique instead the chess scanning strategy, it is possible to save about 3% to 45% of production time gain for the first case of study. The gain of production time per surface unit was analyzed in the second case of study. The correspondent analysis permitted to highlight the percentage of gain of time related to the area to scan. Indeed, the gain per surface unit varies between 4.32×10-6%/mm2 and 6.96×10-05%/mm2. In one hand, these indicators depend linearly on the decomposition strategy of the central area of the SBP technique and also according to the rectangle dimensions. In addition, for the lowest values of hatch space, around 25µm, the two techniques in competition present quasi-similar production time, where the variations between them is minimal. Nevertheless, starting from 65µm, the SBP scanning strategy present considerable less time of production judged as exponentially decreasing according to the hatch space distance. Finally, one can see that the scanning model proposed could present major contributions in other scientific and technical fields that use surface control as territorial security, water adduction and distribution, telecommunication, etc. by varying and adapting the decision variables according to each field of study.

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Rheological parameters and building time of 3D printing sulphoaluminate cement paste modified by retarder and diatomite

Cited by 82 publications

References 38 publications

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

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

Skeleton Based Perpendicularly Scanning - A New Scanning Strategy for Additive Manufacturing: Modeling and Optimization

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Rheological parameters and building time of 3D printing sulphoaluminate cement paste modified by retarder and diatomite

Cited by 82 publications

References 38 publications

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

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

Skeleton Based Perpendicularly Scanning -&nbsp;A New Scanning Strategy for Additive Manufacturing: Modeling and Optimization

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Skeleton Based Perpendicularly Scanning - A New Scanning Strategy for Additive Manufacturing: Modeling and Optimization