Fracture and Structural Integrity e-ISSN 1971-8993 Open access
Fracture Vol. 16, No. 59 (2022)

Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks.

Author and affiliation details
DOI
10.3221/IGF-ESIS.59.32
Pages
486-513
Published
Licence
CC BY 4.0
Published inVol. 16, No. 59 (2022)Go to the issue

Abstract

The creation of cracks, which are the most common cause of structural failure, has a significant impact on the structure's strength and durability. As a result, effective repair and maintenance are vital and unavoidable for treating any of these issues. Self-healing mortar holds promising benefits for reducing the cost of repair as cracks are autonomously repaired without any human intervention. This study investigated the effect of bacteria type, bacteria content, bacteria concentration, and nutrient type on the properties of the self-healing mortar. Three types of bacteria, Bacillus sphaericus, Bacillus Megaterium, and Bacillus subtilis encapsulated in calcium alginate beads, were introduced into the mortar. Two concentrations of bacteria, 2× 108 and   2× 109 Colony Forming Units per milliliter, and different percentages of bacteria of cement weight were selected for the study. In addition, calcium lactate and calcium acetate were used at 0.5% of cement weight as nutrition for bacteria. Tests were performed for compressive strength, bending strength, SEM, EDX, and TGA/DTG. The results show a significant development in the mechanical behaviour of mortar, especially with Bacillus Megaterium using a 2.5% bacterial proportion with a concentration 2× 109 CFU/ml. This can be related to the filling of voids and cracks in microbial mortar by calcite, which was confirmed by SEM and EDX.

Keywords

Article history

  1. ReceivedUntil the next stage: 37 days
  2. RevisedUntil the next stage: 1 day
  3. AcceptedUntil the next stage: 17 days
  4. Published

How to cite

APA

Ahmed Refat El-Mahdy, M., ELShami, A., Yousry Elshikh, M., & Saleh Elsayed Ahmad, S. (2021). Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks. Fracture and Structural Integrity, 16(59), 486–513. https://doi.org/10.3221/IGF-ESIS.59.32

IEEE

M. Ahmed Refat El-Mahdy, A. ELShami, M. Yousry Elshikh, and S. Saleh Elsayed Ahmad, “Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks.,” Fracture and Structural Integrity, vol. 16, no. 59, pp. 486–513, 2021, doi: 10.3221/IGF-ESIS.59.32.

MLA

Ahmed Refat El-Mahdy, Mohamed, et al. “Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks.” Fracture and Structural Integrity, vol. 16, no. 59, 2021, pp. 486–513. https://doi.org/10.3221/IGF-ESIS.59.32.

Chicago

Ahmed Refat El-Mahdy, Mohamed, Ahmed ELShami, Mohamed Yousry Elshikh, and Seleem Saleh Elsayed Ahmad. 2021. “Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks.” Fracture and Structural Integrity 16 (59): 486–513. https://doi.org/10.3221/IGF-ESIS.59.32.

Harvard

Ahmed Refat El-Mahdy, M., ELShami, A., Yousry Elshikh, M. and Saleh Elsayed Ahmad, S. (2021) ‘Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks.’, Fracture and Structural Integrity, 16(59), pp. 486–513. doi: 10.3221/IGF-ESIS.59.32.

Vancouver

Ahmed Refat El-Mahdy M, ELShami A, Yousry Elshikh M, Saleh Elsayed Ahmad S. Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks. Fracture and Structural Integrity. 2021;16(59):486-513. doi:10.3221/IGF-ESIS.59.32

BibTeX

@article{ahmedrefatelmahdy2021, author = {Ahmed Refat El-Mahdy, Mohamed and ELShami, Ahmed and Yousry Elshikh, Mohamed and Saleh Elsayed Ahmad, Seleem}, title = {Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks.}, journal = {Fracture and Structural Integrity}, year = {2021}, volume = {16}, number = {59}, pages = {486--513}, doi = {10.3221/IGF-ESIS.59.32}, url = {https://doi.org/10.3221/IGF-ESIS.59.32}, issn = {1971-8993} }

RIS

TY - JOUR AU - Ahmed Refat El-Mahdy, Mohamed AU - ELShami, Ahmed AU - Yousry Elshikh, Mohamed AU - Saleh Elsayed Ahmad, Seleem TI - Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks. JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2021 DA - 2021/12/22 VL - 16 IS - 59 SP - 486 EP - 513 DO - 10.3221/IGF-ESIS.59.32 UR - https://doi.org/10.3221/IGF-ESIS.59.32 SN - 1971-8993 ER -

Licence

Creative Commons Attribution 4.0 International

May be shared and adapted, provided appropriate credit is given. Copyright © 2021 Mohamed.A.R. Elmahdy, A.A. ELShami, El-Shikh M. Yousry, Seleem S. E. Ahmad.

Copyright 
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.  

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