Title:Rheology Assessment of Mortar Materials for Additive Manufacturing
Volume: 17
Issue: 4
Author(s): Ana Pedrosa*Florindo Gaspar
Affiliation:
- Research Grant, Centre for Rapid and Sustainable Product Development, Polytechnic of Leiria, Portugal
Keywords:
3D printing, construction, yield stress, flow table test, rheometer, direct shear test, unconfined uniaxial compression test, penetration test.
Abstract: This review article discusses the relevant rheological tests to evaluate the properties of
compositions applied to the 3D printing of concrete (3DCP). These materials must rapidly develop
rigidity and resistance, avoiding the collapse of the printed structure, with suitable buildability
and other state properties, such as extrudability. A good balance must be maintained between
properties and rheological parameters, such as yield stress and viscosity. Cohesion, Young's
modulus, and thixotropy are also among the parameters used in these evaluations. The rheological
tests addressed are the rheometer, direct shear test, uniaxial unconfined compression test, and
penetration test. Their limitations must be taken into account to obtain accurate values of the rheological
parameters. It was found that the most used test is the rheometer, and the test that needs
to be further studied is the penetration test. Hence, it is recommended to search for a more expeditious
method related to the rheological assessment to facilitate obtaining the associated parameters
in a simple way.