Improving printability of limestone-calcined clay-based cementitious materials by using viscosity-modifying admixture

By Yu Chen, S. Figueiredo, Zhenming Li, Ze Chang, K. Jansen, O. Çopuroğlu, Erik Schlangen. Cement and Concrete Research, 2020

254 citations recorded by the source corpus.

In 3D concrete printing (3DCP), it is necessary to meet contradicting rheological requirements: high fluidity during pumping and extrusion, and high stability and viscosity at rest to build the layered structure. In this paper, the impact of the hydroxypropyl methylcellulose (HPMC)-based viscosity-modifying admixture (VMA) on the 3D printability and mechanical performance of a limestone and calcined clay based cementitious material is investigated. A combination of VMA and superplasticizer was used for that purpose. In this case, controlling the competitive effects between VMA and superplasticizer becomes critical. The main strategy for 3D printing in this study was to add an optimal dosage of VMA in the solid suspension that was already mixed with water and superplasticizer. A lab-scale 3DCP setup was developed and demonstrated as well. A series of tests was performed to characterize the effects of VMA on flowability, extrudability, open time, buildability, green strength, hydration, compressive strength, and air void content and distribution. Experiments performed in this study showed that the mixture containing 0.24% (of the binder mass) of VMA exhibited satisfactory 3D printability and optimal mechanical performance. Finally, the results, limitations, and perspectives of the current research were discussed.

Subfields: Automotive Engineering, Building and Construction, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/8d316dd3014fbeab0aea1064dd97e234d8c32546

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Automotive Engineering

1. K. Jansen
2. O. Çopuroğlu
3. Yu Chen
4. Erik Schlangen

In Building and Construction

1. C. Romero Rodriguez
2. K. Jansen
3. O. Çopuroğlu
4. Yu Chen
5. Erik Schlangen

In Civil and Structural Engineering

1. O. Çopuroğlu
2. K. Jansen
3. Yu Chen
4. Erik Schlangen
5. Abhijit Mukherjee
6. V. Achal

Citations in the corpus

• Effect of printing parameters on interlayer bond strength of 3D printed limestone-calcined clay-based cementitious materials: An experimental and numerical study (2020, methodology): “The samples were printed by the 3DCP setup of Delft University of Technology (TU Delft), which has been introduced by [22,23].”