الفهرس 
Literature Review of Polymeric and Bacterial Concrete.Only 14 pages are availabe for public view
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Abstract
Concrete cracks are one of the most important problems that affect the
sustainability of concrete structures. Researchers have developed many
different techniques to repair the damaged concrete structures. However,
these techniques require enormous human efforts and resources to complete
the restoration of concrete structures.
Therefore, many alternative methods have been developed to provide inexpensive solutions for concrete crack remediation. The self-healing phenomenon is one of the popular solutions that can be integrated to the construction industry. Self-healing concrete is defined as the concrete that can heal the cracks inside of the concrete structure without direct human intervention. Researchers have worked on developing many different types of self-healing concrete materials using different sub-materials and techniques.
This research used a technique to evaluate damage level and the self-healing degree of the used samples by a device called Ultrasonic Pulse Velocity
(UPV) .This paper presents experimental results of self-healing process of concrete damaged at different ages. Essentially, the self-healing of damaged concrete is processes of crack closing with re-hydration products of un-hydrated or insufficiently-hydrated cementitious particles for the polymeric samples in damaged regions or by producing healed material fills the cracks that‘s for the bacterial sales.
Damage degree was measured from decrease in Ultrasonic Pulse Velocity (UPV) before and after loading, and the self-healing effect was deduced from the strength increment after self-healing by calculating a self-healing degree.
where two polymeric materials (Styrene Butadiene Rubber-Polyethylene Glycol- 400) and three different types of bacteria (Bacillus-Pasturii, Bacillus- Megatruim and Bacillus-Sphericus) were used for the healing process.the damage level of samples after loading was calculated then the pulse velocity was determined after (20-40 and 60) days then the healing ratio was determined.