Application of modified-alginate encapsulated carbonate producing bacteria in concrete: a promising strategy for crack self-healing

Wang, Jianyun; Mignon, Arn; Snoeck, Didier; Wiktor, Virginie; Vliergerghe, Sandra Van; Boon, Nico; Belie, Nele De

doi:10.3389/fmicb.2015.01088

Cited by 166 publications

(88 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Wang et al have also considered a modified‐alginate biohydrogel containing around 4 × 10 9 spores g −1 of hydrogel . Palin et al applied alginate beads to encapsulate spores of an undisclosed bacterium .…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

A Review of Self‐Healing Concrete for Damage Management of Structures

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

Self Cite

492

278

View full text Add to dashboard Cite

The increasing concern for safety and sustainability of structures is calling for the development of smart self-healing materials and preventive repair methods. The appearance of small cracks (<300 µm in width) in concrete is almost unavoidable, not necessarily causing a risk of collapse for the structure, but surely impairing its functionality, accelerating its degradation, and diminishing its service life and sustainability. This review provides the state-ofthe-art of recent developments of self-healing concrete, covering autogenous or intrinsic healing of traditional concrete followed by stimulated autogenous healing via use of mineral additives, crystalline admixtures or (superabsorbent) polymers, and subsequently autonomous self-healing mechanisms, i.e. via, application of micro-, macro-, or vascular encapsulated polymers, minerals, or bacteria. The (stimulated) autogenous mechanisms are generally limited to healing crack widths of about 100-150 µm. In contrast, most autonomous self-healing mechanisms can heal cracks of 300 µm, even sometimes up to more than 1 mm, and usually act faster. After explaining the basic concept for each self-healing technique, the most recent advances are collected, explaining the progress and current limitations, to provide insights toward the future developments. This review addresses the research needs required to remove hindrances that limit market penetration of self-healing concrete technologies.

show abstract

Section: Self‐healing Bioconcretementioning

confidence: 99%

A Review of Self‐Healing Concrete for Damage Management of Structures

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

Self Cite

492

278

View full text Add to dashboard Cite

show abstract

“…This method has not been investigated for the production of microcapsules for construction and structural applications. However, recently some preliminary studies reported the use of alginate to encapsulate corrosion inhibitors [10] and bacteria for selfhealing concrete [23][24][25].…”

Section: +mentioning

confidence: 99%

Polymeric microcapsules with switchable mechanical properties for self-healing concrete: synthesis, characterisation and proof of concept

Kanellopoulos

Palmer²,

Kerr³

et al. 2017

Smart Mater. Struct.

123

View full text Add to dashboard Cite

Microcapsules, with sodium silicate solution as core, were produced using complex coacervation in a double, oil-in-water-in oil, emulsion system. The shell material was a gelatin-acacia gum crosslinked coacervate and the produced microcapsules had diameters ranging from 300 to 700 μm. The shell material designed with switchable mechanical properties. When it is hydrated exhibits soft and 'rubbery' behaviour and, when dried, transitions to a stiff and 'glassy' material. The microcapsules survived drying and rehydrating cycles and preserved their structural integrity when exposed to highly alkaline solutions that mimic the pH environment of concrete. Microscopy revealed that the shell thickness of the microcapsules varies across their perimeter from 5 to 20 μm. Thermal analysis showed that the produced microcapsules were very stable up to 190°C. Proof of concept investigation has demonstrated that the microcapsules successfully survive and function when exposed to a cement-based matrix. Observations showed that the microcapsules survive mixing with cement and rupture successfully upon crack formation releasing the encapsulated sodium silicate solution.

show abstract

“…For the same application, these alginates have also been tested with encapsulated carbonate producing bacteria [76]. To the best of our knowledge, the use of biopolymers for applications in mortar and concrete has only been reported scarcely.…”

Section: Superabsorbent Polymersmentioning

confidence: 99%

Crack Mitigation in Concrete: Superabsorbent Polymers as Key to Success?

et al. 2017

Self Cite

View full text Add to dashboard Cite

Cracking is a major concern in building applications. Cracks may arise from shrinkage, freeze/thawing and/or structural stresses, amongst others. Several solutions can be found but superabsorbent polymers (SAPs) seem to be interesting to counteract these problems. At an early age, the absorbed water by the SAPs may be used to mitigate autogenous and plastic shrinkage. The formed macro pores may increase the freeze/thaw resistance. The swelling upon water ingress may seal a crack from intruding fluids and may regain the overall water-tightness. The latter water may promote autogenous healing. The use of superabsorbent polymers is thus very interesting. This review paper summarizes the current research and gives a critical note towards the use of superabsorbent polymers in cementitious materials.

show abstract

Application of modified-alginate encapsulated carbonate producing bacteria in concrete: a promising strategy for crack self-healing

Cited by 166 publications

References 44 publications

A Review of Self‐Healing Concrete for Damage Management of Structures

A Review of Self‐Healing Concrete for Damage Management of Structures

Polymeric microcapsules with switchable mechanical properties for self-healing concrete: synthesis, characterisation and proof of concept

Crack Mitigation in Concrete: Superabsorbent Polymers as Key to Success?

Contact Info

Product

Resources

About