Jonkers et al. (2010) — Application of Bacteria as Self-Healing Agent for the Development of Sustainable Concrete
Citation
Jonkers, H. M., Thijssen, A., Muyzer, G., Copuroglu, O., & Schlangen, E. (2010). Application of bacteria as self-healing agent for the development of sustainable concrete. Ecological Engineering, 36(2), 230–235.
- DOI:
10.1016/j.ecoleng.2008.12.036 - Atlas layer: foundational
- Related Victor Li book chapter: Chapter 10: Long-Term Durability and Self-Healing (Autonomous Bio-Mineralization & Microbial Healing)
- Source PDF:
jonkers-2010-application-of-bacteria-as-self-healing.pdf - Extracted text:
full_text/jonkers-2010-application-of-bacteria-as-self-healing_full_text.md - Source note:
source_notes/jonkers-2010-application-of-bacteria-as-self-healing_source_note.md
Why this paper matters
The landmark pioneer paper on microbial self-healing concrete from TU Delft. Introduces the concept of embedding alkali-resistant endospores (Bacillus pseudofirmus and Bacillus cohnii) and organic nutrient substrates into cementitious matrices to trigger autonomous metabolic precipitation of calcium carbonate ($\text{CaCO}_3$) upon crack formation and water ingress.
Main contribution
- Demonstrates for the first time that endospores of alkali-resistant aerobic bacteria (Bacillus pseudofirmus DSM 8715 and Bacillus cohnii DSM 6307) can be directly embedded into high-pH cement paste ($\text{pH} = 11\text{--}13$) and remain viable for up to 4 months.
- Formulates the metabolic biomineralization pathway using organic calcium lactate: $\text{Ca(C}_3\text{H}_5\text{O}_3)_2 + 5\text{O}_2 \rightarrow \text{CaCO}_3 + 5\text{CO}_2 + 5\text{H}_2\text{O}$, where released $\text{CO}_2$ subsequently reacts with matrix portlandite $\text{Ca(OH)}_2 + \text{CO}_2 \rightarrow \text{CaCO}_3$.
- Identifies that continuous pore refinement during cement hydration ($< 1\ \mu\text{m}$) compresses bacterial cells, necessitating protective encapsulation carriers for long-term spore survival.
- Proves that bio-cement specimens produce substantially higher volumes of crack-plugging calcite crystals than abiotic control specimens, establishing the foundation for autonomous self-healing civil materials.
Evidence summary
- Bacterial Strains: Spore-forming alkaliphilic bacteria (Bacillus pseudofirmus and Bacillus cohnii), capable of growth and mineral precipitation at $\text{pH } 10\text{--}11$.
- Metabolic Pathway: Non-ureolytic oxidation of calcium lactate avoiding ammonium ion production, precipitating $\text{CaCO}_3$ calcite minerals.
- Viability & Spore Survival: Spores survived intact in young cement paste for 4 months; pore size reduction below $1\ \mu\text{m}$ during matrix densification identified as the main factor limiting long-term unencapsulated viability.
- Crack Healing Performance: Bio-mineral specimens exhibited robust precipitation of crystalline calcium carbonate layers across crack surfaces upon water exposure, sealing ingress pathways.
Linked Atlas nodes
04_material_systems/green_ecc.md04_material_systems/self_healing_ecc.md05_experiments/self_healing_evaluation.md02_concepts/life_cycle_analysis.md
Relationship to Victor Li book
- Serves as the foundational biological reference cited in Victor Li (2019) Chapter 10 (Self-Healing ECC, pp. 267–305).
- Provides the microbial bio-mineralization mechanism that complements ECC's intrinsic crack width control: while ECC micromechanically restricts crack widths strictly below $50\ \mu\text{m}$, bacterial spores autonomously precipitate calcite to completely seal the cracks, eliminating permeability and extending infrastructure service life.
Claim-evidence rows to add
| Atlas node | Claim | Evidence summary | Page/Figure/Table | Status |
|---|---|---|---|---|
04_material_systems/self_healing_ecc.md |
Alkali-resistant Bacillus spores metabolize calcium lactate to precipitate crack-sealing CaCO3 minerals in cement paste | Microbiological viability assays and SEM mineral precipitation analysis in hardened paste | Section 2.1 & 3, Fig. 1-4 | verified_from_pdf |
04_material_systems/self_healing_ecc.md |
Unencapsulated bacterial spores survive in high-pH cement paste (pH 11–13) for up to 4 months | Most probable number (MPN) microbiological viability counts over 4-month hydration periods | Section 3.1 & 3.2, Fig. 2 | verified_from_pdf |
Verification status
- PDF preserved: yes (
jonkers-2010-application-of-bacteria-as-self-healing.pdf) - Text extracted: yes (
full_text/jonkers-2010-application-of-bacteria-as-self-healing_full_text.md) - DOI verified: yes (
10.1016/j.ecoleng.2008.12.036) - Metadata verified: yes (Ecological Engineering, Vol. 36, No. 2, pp. 230–235, 2010)
- Claim-evidence matrix ready: yes
Cautions
- Unprotected direct mixing of spores limits long-term viability as pore diameters drop below 1 $\mu\text{m}$; subsequent studies by Jonkers' team introduced porous expanded clay/glass encapsulation.
- Does not contain synthetic ductile fibers (unreinforced cement paste/stone).