1. Presented by,
Name : K PALLAVI
USN : 4VP21CV406
VIVEKANANDA COLLEGE OF ENGINEERING AND TECHNOLOGY
[A UNIT OF VIVEKANANDA VIDYAVARDHAKA SANGHA PUTTUR ®]
Affiliated to Visvesvaraya Technological University
Approved by AICTE New Delhi & Recognized by Govt. of Karnataka
DEPARTMENT OF CIVIL ENGINEERING
2023-2024
Under the guidance of:
Prof. SUREKHA T
(Assistant Professor, Department of Civil Engineering)
NEHRU NAGAR, PUTTUR – 574203, D.K, KARNATAKA, INDIA.
1
TECHNICAL SEMINAR
ON
“BACTERIAL CONCRETE”
2. CONTENTS
1. INTRODUCTION
2. BACTERIAL CONCRETE
3. CLASSIFICATION OF BACTERIA
4. PREPARATION OF SELF-HEALING CONCRETE
5. MECHANISM OF BACTERIA IN CONCRETE
6. TESTS ON BACTERIAL CONCRETE
7. ADVANTAGES AND DISADVANTAGES
8. APPLICATIONS
9. CASE STUDY
10. SUMMARY
11. REFERENCE
2
3. 1. INTRODUCTION
3
• Concrete is a vital building material that is an absolutely essential component of public
infrastructure and most buildings.
• It is most effective when reinforced by steel rebar, mainly because its tensile strength without
reinforcement is considerably lower relative to compressive strength.
• But drawback of these materials is it cracks under sustained loading and due to aggressive
environmental agents which ultimately reduces the life of the structure which are built using
these materials.
CONCRETE
4. 1. INTRODUCTION
4
• Cracking of concrete is a common phenomenon.
• Without immediate and proper treatment, cracks in concrete structures tend to expand further and
eventually require costly repairs.
• Synthetic materials like epoxies are used for remediation. But they are costly, reduce aesthetic
appearance and need constant maintenance.
• Thus, there is a material called “Self-Healing Concrete” in development, that can solve many of the
problems commonly associated with standard concrete.
5. 2. BACTERIAL CONCRETE
5
• It is a special type of concrete invented by a group of
microbiology researchers under the head of Henk
Jonkers.
• Filling of the cracks is a biological reaction or in other
words, limestone is produced within the concrete with
the help of bacteria and after hardening it fills the crack
known as self healing of concrete. It is also known as
Bio Concrete or Bacterial Concrete. SELF-HEALING BACTERIAL CONCRETE
6. 2. BACTERIAL CONCRETE
6
• The bacteria which is present inside the concrete will be in a dormant state for over 200 years
under dry conditions and when there will be a crack, moisture enters inside the concrete, and
bacteria act as a catalyst in the process of crack healing.
• The cracks which are in the range of 0.05 to 0.1 mm are completely sealed in repetitive dry and
wet cycles.
• Thus it is specially made to increase the lifespan or durability of concrete structure by the self-
healing action of the concrete.
7. 3. CLASSIFICATION OF BACTERIA
7
The Bacteria can be classified based on three categories:
1. Based on shape
• Bacilli
• Spirilla
• Cocci
2. Based on gram strain
• Gram positive
• Gram negative
3. Based on survival in atmosphere
• Aerobic
• Anaerobic
8. 3. CLASSIFICATION OF BACTERIA
8
Based on Shape Based on Survival in Atmosphere
Based on Gram Strain
9. 9. CASE STUDY
• Chintalapudi Kartik et al., (2016) conducted a study on “Properties of Bacterial Based Self Healing
Concrete.”
• In this case study it was discussed that, the addition of urease producing bacteria along with calcium
source results in calcite precipitation in concrete.
• The ureolytic bacteria "Bacillus pasteurii" which can produce urea is added along with the healing
agent to seal the freshly formed micro-cracks by calcium carbonate precipitation.
• Experiments showed that the cell concentrations of 106 cells/ml of water in the cement paste and
mortar specimens has higher compressive strength gain was up to 39.8%, 33.07% and 50%, 28.2%
respectively.
9
10. 7. CONCLUSION
10
1. Rich Learning Experience: The internship at Medini Technologies from August to September
2023 was enriching, offering valuable insights and knowledge.
2. Professional Growth: It helped in discovering potential, shaping professional life, and fostering
personal development.
3. Skills Enhancement: Handling challenges and engaging in projects improved skills significantly.
4. Academic-Industry Connection: It bridged the gap between academic studies and practical work
environments.
5. Communication and Collaboration: Communication skills were improved and understanding of
organizational dynamics was broadened.
6. Overall Learning Experience: Observing and implementing various theories contributed to a
valuable learning journey at Medini Technologies.
![Presented by,
Name : K PALLAVI
USN : 4VP21CV406
VIVEKANANDA COLLEGE OF ENGINEERING AND TECHNOLOGY
[A UNIT OF VIVEKANANDA VIDYAVARDHAKA SANGHA PUTTUR ®]
Affiliated to Visvesvaraya Technological University
Approved by AICTE New Delhi & Recognized by Govt. of Karnataka
DEPARTMENT OF CIVIL ENGINEERING
2023-2024
Under the guidance of:
Prof. SUREKHA T
(Assistant Professor, Department of Civil Engineering)
NEHRU NAGAR, PUTTUR – 574203, D.K, KARNATAKA, INDIA.
1
TECHNICAL SEMINAR
ON
“BACTERIAL CONCRETE”](https://image.slidesharecdn.com/seminarpresentation-240403081632-22430491/85/seminar-PRESENTATION-pptx1seminar-PRESENTATION-pptxseminar-PRESENTATION-pptx-1-320.jpg)
