Bond Modification of Carbon Rovings through Profiling

Area of Science:

• Materials Science
• Civil Engineering
• Composite Materials

Background:

• Composite performance relies heavily on component bonding.
• While bond mechanisms in traditional reinforced concrete are understood, carbon and textile reinforced concrete require further research due to numerous influencing factors.
• The varying contributions of adhesive, frictional, and shear bond depend on fiber type, yarn processing, impregnation, geometry, and concrete properties.

Purpose of the Study:

• To investigate the influence of yarn profiling on the bond and tensile behavior of composites.
• To explore the potential of defined yarn profiling to increase shear bond (form fit) and control bond resistance.
• To introduce a novel profiling technique for creating defined tetrahedral profiles on yarns.

Main Methods:

• Development and application of a new profiling technique to create defined tetrahedral yarn profiles.
• Conducting tensile and bond tests on yarns with varying profile characteristics, impregnation, and consolidation parameters.
• Performing micrographic analysis of profiled yarns.

Main Results:

• Profiled yarns exhibit superior bond properties compared to conventional smooth yarns.
• A defined modification of bond properties is achievable by altering profile geometry, impregnation, and consolidation parameters.
• The study demonstrates the effectiveness of the developed profiling technique.

Conclusions:

• Defined yarn profiling significantly enhances bond properties in textile and carbon reinforced concrete.
• The novel profiling technique offers a reliable method for controlling and improving composite performance.
• Further research into optimizing profiling parameters can lead to advanced composite materials.