Crack Width Estimation of Mortar Specimen Using Gas Diffusion Experiment.

Area of Science:

• Materials Science
• Civil Engineering
• Concrete Technology

Background:

• Self-healing concrete technologies are advancing for structural maintenance.
• Current methods for evaluating self-healing performance, like water permeability tests, face reliability issues due to water viscosity and material elution.
• A robust and reliable evaluation method for self-healing concrete is needed.

Purpose of the Study:

• To propose and validate a novel gas diffusion test for assessing self-healing concrete.
• To establish a method for estimating crack width in self-healing concrete.
• To provide a reliable alternative for evaluating the self-healing performance of concrete structures.

Main Methods:

• Development of a gas diffusion test protocol.
• Application of the gas diffusion test to specimens with varying crack widths.
• Verification of the correlation between gas diffusion measurements and crack width.

Main Results:

• The proposed gas diffusion test accurately estimates crack width in concrete.
• The method demonstrates effectiveness in quantifying crack dimensions relevant to self-healing.
• Gas diffusion measurements provide a reliable indicator of crack characteristics.

Conclusions:

• The gas diffusion test is a viable and effective method for estimating crack width in self-healing concrete.
• This technique offers improved reliability over traditional water permeability tests.
• The gas diffusion test can be applied to evaluate the overall self-healing performance of concrete.