Drawback of Concrete

Performance of S.H.C

Drawbacks of S.H.C

Preparation of Bacillus Subtilis

Production of Self Healing Concrete

Fracture Crack by 3-Point bending Test Crack-healingIncubation Flexural Strength Recover Evaluation

Although maximum 0.3mm-width crack gap can be sealed with calcite precipitation in 28days, the heal rate dropped dramatically with crack depth increasing. The indepth healing remains a challenge for the future researchers.

With B. subtilis M9, self-healing concrete was produced with flexural strength of 4.2MPa according to 3-point-bending test. After 28 days of self-healing, the sealed beam flexural strength subjected to second time bending was enhanced about average 14o/o strength recovery rate. Still the strength regain capability needs to be further improved for field study to achieve 50% strength recover by self-healing.