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Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks
Faculty
Engineering
Year:
2022
Type of Publication:
ZU Hosted
Pages:
Authors:
Selem Saleh Elsayed Ahmed Dawod
Staff Zu Site
Abstract In Staff Site
Journal:
Frattura ed Integrità Strutturale Frattura ed Integrità Strutturale, 59 (2022) 486-513.
Volume:
Keywords :
Self-healing mortar using different types, content,
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 (CFU/ml), 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 behavior 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
Author Related Publications
Selem Saleh Elsayed Ahmed Dawod, "Mechanical properties of sustainable concrete comprising various wastes", Springer, 2023
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Selem Saleh Elsayed Ahmed Dawod, "Mechanical behavior of concrete at different levels of compressive strength", Fourth International Conference On Civil And Architecture Engineering, 2002
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Selem Saleh Elsayed Ahmed Dawod, "Correlation the effect of beam size and crack-depth ratio in concrete by using a modified stress intensity factor", Al-Mansoura Engineering International Conference, --- , Sharm Elsheikh, EGYP, 2003
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Selem Saleh Elsayed Ahmed Dawod, "Mechanical behavior of high strength concrete reinforced by different types of fibers", Al-Azhar Engineering Seven International Conference, April 2003, Cairo, EGYPT., 2003
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Selem Saleh Elsayed Ahmed Dawod, "Sulfate attack on concrete from mixing and curing water", Al-Azhar Engineering Seven International Conference, April 2003, Cairo, EGYPT., 2004
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Department Related Publications
Ibrahim Attia Abdelmegeed Abdelgawad, "An experimental study of different factors affecting the bond of NSM FRP bars in concrete", ScienceDirect, 2013
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Mohamed Abdallah Hussin Elmenyawy, ""Positron annihilation spectroscopy and mechanical properties studies for epoxy matrices reinforced with different nanoparticles"", Journal of Polymer Research ( J Polym Res ), 2016
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Amal Abdelwahab Mohamed Badawy, "Effect of Sand Aggregate Ratio and Type of Coarse Aggregate on the Properties of Self Compacting Concrete", Engineering Research Journal, Faculty of Engineering Minoufiya University, 2006
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Amal Abdelwahab Mohamed Badawy, "Flexural Behavior of Strengthened Steel-Concrete Composite Beams by Various Plating Methods", Journal of Constructional Steel Research, 2010
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