Experience in Online Modification of Rheology and Strength Acquisition of 3D Printable Mortars

  • V. EsnaultEmail author
  • A. Labyad
  • M. Chantin
  • F. Toussaint
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 19)


This study focus on the early age properties of two mortar formulations designed for a 3D printing extrusion process. They follow a new design and process strategy, which consists in formulating a mortar to be self-levelling, to optimize pumpability, and then incorporating an additive in the extrusion nozzle to modify rheology properties and setting properties to adapt it to the requirement of the printing process (self-sustaining as soon as the material exits the nozzle, and fast strength acquisition). Two types of additives are considered: an alkali-free shotcrete accelerator and a starch ether based VMA. Compression and shear strength measurements from 2 min to 4 h after the incorporation of the additive demonstrate the capacity of the method to create mortars with strength acquisition vastly superior to results from the literature. Lab-scale extrusion and operational feedback from 3D printing customers demonstrate the feasibility at operational scale. The variety of properties obtainable by playing with different types of additives is also discussed.


3D printing Formulation Extrusion process 



The resulted presented in this study are originated in the research project HINDCON (Hybrid INDustrial CONstruction) funded by the European Commission (Grant Agreement n°723611).


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Copyright information

© RILEM 2019

Authors and Affiliations

  • V. Esnault
    • 1
    Email author
  • A. Labyad
    • 1
  • M. Chantin
    • 1
  • F. Toussaint
    • 1
  1. 1.Lafarge Centre de RechercheSaint Quentin FallavierFrance

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