The relationship between the rheological behavior and interlayer bonding properties of 3D printing cementitious materials with the addition of attapulgite

The most active research area is nanotechnology in cementitious composites, which has a wide range of applications and has achieved popularity over the last three decades. Nanoparticles (NPs) have emerged as possible materials to be used in the field of civil engineering. Previous research has concentrated on evaluating the effect of different NPs in cementitious materials to alter material characteristics. In order to provide a broad understanding of how nanomaterials (NMs) can be used, this paper critically evaluates previous research on the influence of rheology, mechanical properties, durability, 3D printing, and microstructural performance on cementitious materials. The flow properties of fresh cementitious composites can be measured using rheology and slump. Mechanical properties such as compressive, flexural, and split tensile strength reveal hardened properties. The necessary tests for determining a NM’s durability in concrete are shrinkage, pore structure and porosity, and permeability. The advent of modern 3D printing technologies is suitable for structural printing, such as contour crafting and binder jetting. Three-dimensional (3D) printing has opened up new avenues for the building and construction industry to become more digital. Regardless of the material science, a range of problems must be tackled, including developing smart cementitious composites suitable for 3D structural printing. According to the scanning electron microscopy results, the addition of NMs to cementitious materials results in a denser and improved microstructure with more hydration products. This paper provides valuable information and details about the rheology, mechanical properties, durability, 3D printing, and microstructural performance of cementitious materials with NMs and encourages further research.

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3D printing of calcined clay-limestone-based cementitious materials

Cement and Concrete Research ◽

10.1016/j.cemconres.2021.106553 ◽

2021 ◽

Vol 149 ◽

pp. 106553

Author(s):

Yu Chen ◽

Shan He ◽

Yu Zhang ◽

Zhi Wan ◽

Oğuzhan Çopuroğlu ◽

...

Keyword(s):

3D Printing ◽

Cementitious Materials ◽

Calcined Clay

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The relationship between the rheological behavior of RBCs and angiogenesis in the morbidly obese

Clinical Hemorheology and Microcirculation ◽

10.3233/ch-180420 ◽

2019 ◽

Vol 71 (1) ◽

pp. 95-102 ◽

Cited By ~ 2

Author(s):

Jerzy Piecuch ◽

Anna Mertas ◽

Alicja Nowowiejska–Wiewiora ◽

Robert Zurawel ◽

Sławomir Gregorczyn ◽

...

Keyword(s):

Rheological Behavior ◽

Morbidly Obese ◽

The Relationship

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The relationship of rheological behavior of the vaginal fluid at the time of insemination to the pregnancy rate in dairy cows

Theriogenology ◽

10.1016/s0093-691x(97)00307-5 ◽

1997 ◽

Vol 48 (5) ◽

pp. 865-871 ◽

Cited By ~ 5

Author(s):

F. López-Gatius ◽

J. Labèrnia ◽

P. Santolaria ◽

J. Rutllant ◽

M. López-Béjar

Keyword(s):

Dairy Cows ◽

Pregnancy Rate ◽

Rheological Behavior ◽

Vaginal Fluid ◽

Relationship Of ◽

The Relationship

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Additive Manufacturing of Cementitious Materials by Selective Paste Intrusion: Numerical Modeling of the Flow Using a 2D Axisymmetric Phase Field Method

Materials ◽

10.3390/ma13215024 ◽

2020 ◽

Vol 13 (21) ◽

pp. 5024

Author(s):

Alexandre Pierre ◽

Daniel Weger ◽

Arnaud Perrot ◽

Dirk Lowke

Keyword(s):

Numerical Modeling ◽

3D Printing ◽

Cement Paste ◽

Phase Field ◽

Numerical Approach ◽

Cementitious Materials ◽

Field Method ◽

Phase Field Method ◽

Shape Accuracy ◽

Cement Pastes

The 3D printing of concrete has now entered a new era and a transformation of the construction sector is expected to reshape fabrication with concrete. This work focuses on the selective paste intrusion method, which consists of bonding dry particles of aggregate with a cement paste. This innovative technique could lead to the production of very precise component for specific applications. The main obstacle to tackle in order to reach a high shape accuracy of high mechanical performances of 3D printing elements by selectively activating the material is the control of the distribution of the cement paste through the particle bed. With the aim to better understand the path followed by the solution as it penetrates a cut-section of the granular packing, two-dimensional numerical modeling is carried out using Comsol software. A phase-field method combined with a continuous visco-plastic model has been used to study the influence of the average grain diameter, the contact angle, and the rheological properties of cement pastes on the penetration depth. We compare the numerical modeling results to existing experimental results from 3D experiments and a one-dimensional analytical model. We then highlight that the proposed numerical approach is reliable to predict the final penetration of the cement pastes.

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The Design and Development of an Extrusion System for 3D Printing Cementitious Materials

2019 3rd International Symposium on Multidisciplinary Studies and Innovative Technologies (ISMSIT) ◽

10.1109/ismsit.2019.8932771 ◽

2019 ◽

Author(s):

Abdulrahman Albar ◽

Mohammad Rafiq Swash ◽

Seyed Ghaffar

Keyword(s):

3D Printing ◽

Cementitious Materials ◽

Design And Development

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Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Sustainability ◽

10.3390/su12145628 ◽

2020 ◽

Vol 12 (14) ◽

pp. 5628

Author(s):

Zhanzhao Li ◽

Maryam Hojati ◽

Zhengyu Wu ◽

Jonathon Piasente ◽

Negar Ashrafi ◽

...

Keyword(s):

3D Printing ◽

Experimental Testing ◽

Design Procedure ◽

Cementitious Materials ◽

Material Point ◽

Point Of View ◽

Open Time ◽

Potential Benefits ◽

3D Printed ◽

Hardened Properties

3D-printing of cementitious materials is an innovative construction approach with which building elements can be constructed without the use of formwork. Despite potential benefits in the construction industry, it introduces various engineering challenges from the material point of view. This paper reviews the properties of extrusion-based 3D-printed cementitious materials in both fresh and hardened states. Four main properties of fresh-state printing materials are addressed: flowability, extrudability, buildability, and open time, along with hardened properties, including density, compressive strength, flexural strength, tensile bond strength, shrinkage, and cracking. Experimental testing and effective factors of each property are covered, and a mix design procedure is proposed. The main objective of this paper is to provide an overview of the recent development in 3D-printing of cementitious materials and to identify the research gaps that need further investigation.

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Ultra-High Early Strength Cementitious Grout Suitable for Additive Manufacturing Applications Fabricated by Using Graphene Oxide and Viscosity Modifying Agents

Polymers ◽

10.3390/polym12122900 ◽

2020 ◽

Vol 12 (12) ◽

pp. 2900

Author(s):

Alyaa Mohammed ◽

Nihad Tareq Khshain Al-Saadi

Keyword(s):

Graphene Oxide ◽

Additive Manufacturing ◽

3D Printing ◽

Design Method ◽

Three Dimensional ◽

Cementitious Materials ◽

Fresh Properties ◽

Manufacturing Applications ◽

Mechanical Strengths ◽

The Impact

One of the considerable challenges in the design of cementitious mixtures for additive manufacturing/three-dimensional (3D) printing applications is achieving both suitable fresh properties and significant mechanical strengths. This paper presents the use of graphene oxide (GO) as a promising nano reinforcement material with the potential to improve the printing feasibility and quality of a 3D printed cementitious matrix. Additionally, in this study, a viscosity modifying agent (VMA) was employed as a chemical additive to attain the required consistency and flow. The printed mixture was fabricated using various cementitious materials and waste materials. This study investigated the impact of GO and VMA on the enhancement of the 3D printing of cementitious composites through several tests. A flow test was conducted using the flow table test. The results showed a high fluidity and practical consistency, which are essential for nozzle pumping and accurateness in printed shapes. Furthermore, the bleeding test showed minimal bleeding up to hardening, and a considerable self-cleaning ability was noted during handling when conducting examinations of fresh properties. For hardened properties, the mechanical strengths were exceptionally high, especially at early ages, which is crucial for the stability of sequence layers of printed composites. The tensile strengths were 3.77, 10.5, 13.35, and 18.83 MPa at 1, 3, 7, and 28 days, respectively, and the compressive strengths were 25.1, 68.4, 85.6, and 125.4 MPa at 1, 3, 7, and 28 days, respectively. The test results showed the effectiveness of the fabricated cementitious mixture design method for meeting the requirements for 3D concrete printing applications.

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Apparent Viscosity and Rheological Behavior of Aluminum-Alloy Slurry Containing Nano-Sized SiC Particles

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.285.391 ◽

2019 ◽

Vol 285 ◽

pp. 391-397

Author(s):

Kang Lu ◽

Shu Sen Wu ◽

Shu Lin Lü ◽

Chong Lin

Keyword(s):

Aluminum Alloy ◽

Rheological Behavior ◽

Apparent Viscosity ◽

Mass Fraction ◽

Matrix Alloy ◽

Rotating Cylinder ◽

Viscous Force ◽

Semi Solid ◽

The Relationship ◽

Cylinder Viscometer

The apparent viscosity and rheological behavior of nanoSiCP/Al-5Cu composites were studied by using a high temperature coaxial rotating cylinder viscometer. The results show that mass fraction of nanoSiCP is an important factor for apparent viscosity of the nanoSiCP/Al-5Cu composites, and there is a great enhancement of apparent viscosity of the slurry with the increase of nanoSiCp content. It can attribute to the viscous force between nanoSiCp and matrix alloy melt above the liquidus. The increased amplitude of apparent viscosity in semi-solid state is far less than those in liquid state with the increase of mass fraction of nanoSiCp. The apparent viscosities of the composites reinforced with 0.5%, 1%, 1.5% and 2% nanoSiCp at 700°C were 24.78%, 95.25%, 160.29% and 228.62% higher than that of Al-5Cu alloy, respectively. Besides, the rheological model of nanoSiCP/Al-5Cu composites was established based on the fitting curve, which can precisely describe the relationship between the apparent viscosity of nanocomposites slurry and nanoSiCp mass fraction.

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