Introduction<br />In light of the challenges facing the construction industry, such as cracks that affect the durability of structures,<br /><br />self-healing concrete has emerged as a revolutionary solution. This concrete relies on innovative mechanisms to automatically repair cracks without the need for<br /><br />human intervention, which enhances the life of structures and reduces maintenance costs.<br /><br />What is self-healing concrete?<br /><br />It is a type of concrete that contains special additives, such as calcium-producing bacteria, or capsules filled with adhesives, which are automatically activated when cracks occur and interact with water or air.<br /><br />Self-healing mechanisms<br />The mechanisms for repairing self-healing concrete include the following:<br /><br />1. **Calcium-producing bacteria**: Inactive bacteria are introduced into the concrete, and when cracks form, they react with water<br /><br />and produce calcium carbonate, which seals the cracks.<br /><br />2. **Chemical capsules**: They contain adhesives that are released when a fracture occurs in the concrete, which fills the voids and prevents deterioration.<br />3. **Self-healing cement**: Special cement components are used that have the ability to react with moisture to form solid compounds that heal small cracks.<br />Advantages of self-healing concrete<br />Self-healing concrete provides many benefits, including:<br />- **Reducing maintenance costs**: It does not require frequent repairs, which reduces expenses in the long run.<br />- **Extending the life of structures**: Prevents small cracks from developing into major structural problems.<br />- **Improving sustainability**: It reduces the use of resources to repair concrete, which reduces the carbon footprint of buildings.<br />Applications of self-healing concrete<br />Due to its unique advantages, this concrete is used in many applications, including:<br />- **Bridges and roads**: To resist cracks resulting from repeated loads and environmental conditions.<br />- **Concrete buildings**: Especially in areas that suffer from severe climate changes.<br />- **Tunnels and underground facilities**: Where periodic maintenance is difficult to perform.<br />Conclusion<br />Self-healing concrete represents a significant development in the construction industry, providing smart and sustainable solutions to the problems of<br /><br />cracks and corrosion. As research continues, this technology is expected to become a standard in modern construction projects,<br /><br />contributing to building a more durable and efficient future.