Attentive monitoring and regular repair of concrete cracks are necessary to avoid further durability problems. As an alternative to current maintenance methods, intrinsic repair systems which enable self-healing of cracks have been investigated. Exploiting microbial induced CaCO3 precipitation (MICP) using (protected) axenic cultures is one of the proposed methods. Yet, only a few of the sugges...

Concrete is very sensitive to crack formation. As wide cracks endanger the durability, repair may be required. However, these repair works raise the life-cycle cost of concrete as they are labor intensive and because the structure becomes in disuse during repair. In 1994, C. Dry was the first who proposed the intentional introduction of self-healing properties in concrete. In the following year...

We have developed a concrete material exhibiting self-healing properties and corrosion inhibition. This system involves a sodium silicate solution stored in polyurethane microcapsules present in the concrete matrix. The sodium silicate, released when the capsules are ruptured by propagating cracks, reacts with the calcium hydroxide in cement and produces a C-S-H gel that partially heals the cra...

Crack formation is common among concrete used for all different types of construction. While cracking is inevitable in concrete, it can create instabilities that can compromise an entire building’s structural integrity. New advancements are being made in the biological and engineering fields that are providing a solution to this problem. Certain bacteria and chemicals when mixed provide a react...

Concrete is the most widely used material in civil engineering, but due to its inherent brittleness, generation of cracks easily occurs. Crack healing an effective method for restoring mechanical properties concrete and improving durability. Of all current crack methods, microbial-induced calcium carbonate precipitation technology incredibly promising self-healing strategy that has received wid...

Self-healing materials are smart materials with the capability to repair itself autonomously after being damaged. Since cracks commonly occur in structures consisting of materials like concrete, polymers, etc., a self-healing mechanism is crucial for the durability of the material. In this research, we present a two-dimensional mathematical model of the self-healing process in concrete. This mo...