The motivation for choosing this topic is the growing number of buildings, structures, and bridges that are reaching or have exceeded their expected life cycle. Therefore, service life estimation and extension is an area of increasing importance in civil and structural engineering. CSHM-4 will bring together outstanding civil engineers, academics, designers, construction compa-nies, product and monitoring system managers as well as responsible persons from government, road/highway, waterways and other authorities from all over the world who have an interest in improving the service life, safety and reliability of civil engineering structures.