Limestone and Calcined Clay-Based Sustainable Cementitious Materials for 3D Concrete Printing: A Fundamental Study of Extrudability and Early-Age Strength Development

Chen, Y.; Li, Z.; Chaves Figueiredo, S.; Copuroglu, Oguzhan; Veer, F.A.; Schlangen, E.

doi:10.3390/app9091809

Limestone and Calcined Clay-Based Sustainable Cementitious Materials for 3D Concrete Printing

Title

Limestone and Calcined Clay-Based Sustainable Cementitious Materials for 3D Concrete Printing: A Fundamental Study of Extrudability and Early-Age Strength Development

Author

Chen, Y. (TU Delft Materials and Environment)
Li, Z. (TU Delft Materials and Environment)
Chaves Figueiredo, S. (TU Delft Materials and Environment)
Copuroglu, Oguzhan (TU Delft Materials and Environment)
Veer, F.A. (TU Delft Structural Design & Mechanics)
Schlangen, E. (TU Delft Materials and Environment)

Date

2019

Abstract

The goal of this study is to investigate the effects of different grades of calcined clay on the extrudability and early-age strength development under ambient conditions. Four mix designs were proposed. Three of them contained high, medium, and low grades of calcined clay, respectively, and one was the reference without calcined clay. In terms of extrudability, an extrusion test method based on the ram extruder was introduced to observe the quality of extruded material filaments, and to determine the extrusion pressure of tested materials at different ages. For evaluating the very early-age strength development, the penetration resistance test, the green strength test, and the ultrasonic pulse velocity test were applied. Furthermore, the mechanical properties of the developed mix designs were determined by the compressive strength test at 1, 7 and 28 days. Finally, the main finding of this study was that increasing the metakaolin content in calcined clay could significantly increase the extrusion pressures and green strength, shorten the initial setting time and enhance the compressive strength at 1, 7, and 28 days.

Subject

3D concrete printing
Early-age strength
Extrudability
Limestone and calcined clay
Sustainable

To reference this document use:

http://resolver.tudelft.nl/uuid:5f6fbf00-a54b-4f18-9af6-a2269745b24e

DOI

https://doi.org/10.3390/app9091809

Source

Applied Sciences, 9 (9)

Bibliographical note

Part of the Special Issue Low Binder Concrete and Mortars

Part of collection

Institutional Repository