TY - GEN
T1 - Compressive Strength Improvement and Water Permeability of Self-Healing Concrete Using Bacillus Subtilis Natto
AU - Huynh, Nguyen Ngoc Tri
AU - Imamoto, Kei Ichi
AU - Kiyohara, Chizuru
N1 - Publisher Copyright:
© The authors.
PY - 2020
Y1 - 2020
N2 - In recent years, many projects have been carried out to enhance the durability of concrete structure from the influence of cracks. Generally, managing cracks should be a rather preventative method for sustainable development. Based on that, Bacillus subtilis natto - a local bacterium in Japan was found to have the ability to form CaCO3, which can be used as healing materials for cracks in the concrete structure. The bacterial biomineralization immobilized in lightweight aggregate was studied to improve the compressive strength by healing the cracks and densifying the structure. Moreover, as an essential parameter for durability enhancement, the water permeability of self-healing concrete through a water-flow system was carried out. Experimental results on the behavior of the materials indicate that Bacillus subtilis natto could lead the compressive strength to 40 % higher than the controls. Promising result in preventing the water through the cracks confirmed the self-healing effect with more potential in larger-scale.
AB - In recent years, many projects have been carried out to enhance the durability of concrete structure from the influence of cracks. Generally, managing cracks should be a rather preventative method for sustainable development. Based on that, Bacillus subtilis natto - a local bacterium in Japan was found to have the ability to form CaCO3, which can be used as healing materials for cracks in the concrete structure. The bacterial biomineralization immobilized in lightweight aggregate was studied to improve the compressive strength by healing the cracks and densifying the structure. Moreover, as an essential parameter for durability enhancement, the water permeability of self-healing concrete through a water-flow system was carried out. Experimental results on the behavior of the materials indicate that Bacillus subtilis natto could lead the compressive strength to 40 % higher than the controls. Promising result in preventing the water through the cracks confirmed the self-healing effect with more potential in larger-scale.
KW - Bacillus Subtilis Natto
KW - Bacteria
KW - Calcium carbonate
KW - Crack
KW - Self-healing concrete
UR - http://www.scopus.com/inward/record.url?scp=85125815653&partnerID=8YFLogxK
U2 - 10.23967/dbmc.2020.024
DO - 10.23967/dbmc.2020.024
M3 - Conference contribution
AN - SCOPUS:85125815653
T3 - Current Topics and Trends on Durability of Building Materials and Components - Proceedings of the 15th International Conference on Durability of Building Materials and Components, DBMC 2020
SP - 113
EP - 120
BT - Current Topics and Trends on Durability of Building Materials and Components - Proceedings of the 15th International Conference on Durability of Building Materials and Components, DBMC 2020
A2 - Serrat, Carles
A2 - Casas, Joan Ramon
A2 - Gibert i Armengol, Vicente
PB - International Center for Numerical Methods in Engineering
T2 - 15th International Conference on Durability of Building Materials and Components, DBMC 2020
Y2 - 20 October 2020 through 23 October 2020
ER -