New Test Method for Additive Manufacturing - Determination of interlayer Bond Strength of Additively Constructed Concrete and Mortar by Splitting Tensile Method
1. Scope
1. This test method covers the procedures for the determination of flexural strength for samples extracted from additively constructed concrete and additively constructed mortar components.
2. This test method provides description of the sample size based on aggrgates and bead dimensions and the number of samples.
2. This test method provides description of the testing apperatus to be used for each procedure.
3. This practice addresses the performance of additively constructed concrete and mortar samples by means of mechanical testing.
Keywords
additive construction; three-dimensional printing; concrete coring; concrete sawing, compressive strength, flexural strength
Rationale
It is proposed to develop a test method for determining the bond strength of samples extracted from additively constructed concrete components. In practice there is a significant difference between the behavior of cast components and additively constructed components using cementitious materials. The mechanical properties obtained from samples extracted from components built using additive construction are significantly different from their traditionally cast counterparts. Additionally, the complexities of variable geometries due to the layer-by-layer process, conventional concrete and mortar test methods may lead to conflicting results. There are no known similar test methods for any other material that translates to this need. This test method will provide a universal procedure for testing laboratories to determine the representative bond capacity under tension. This test method will allow architects, engineers and approval agencies a means to define the mechanical performance of building components produced through additive construction and help develop correlations between the mechanical performances of additively constructed concrete and mortars with design values of their cast counterparts.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 06-06-2025
Technical Contact: Shawn Platt
Item: 000
Ballot:
Status: