Compressive Strength Improvement and Water Permeability of Self-Healing Concrete Using Bacillus Subtilis Natto

Nguyen Ngoc Tri Huynh, Kei Ichi Imamoto, Chizuru Kiyohara

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationCurrent 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
EditorsCarles Serrat, Joan Ramon Casas, Vicente Gibert i Armengol
PublisherInternational Center for Numerical Methods in Engineering
Pages113-120
Number of pages8
ISBN (Electronic)9788412110180
DOIs
Publication statusPublished - 2020
Event15th International Conference on Durability of Building Materials and Components, DBMC 2020 - Virtual, Online, Spain
Duration: 20 Oct 202023 Oct 2020

Publication series

NameCurrent 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

Conference

Conference15th International Conference on Durability of Building Materials and Components, DBMC 2020
Country/TerritorySpain
CityVirtual, Online
Period20/10/2023/10/20

Keywords

  • Bacillus Subtilis Natto
  • Bacteria
  • Calcium carbonate
  • Crack
  • Self-healing concrete

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