Encapsulation of expansive powder minerals within a concentric glass capsule system for self-healing concrete

Qureshi, Tanvir; Kanellopoulos, Antonios; Al‐Tabbaa, Abir

doi:10.1016/j.conbuildmat.2016.06.030

Cited by 137 publications

(54 citation statements)

References 39 publications

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“…When bacteria are used to heal cracks in cementitious materials, the crystal growth and crack width reduction can be monitored in time by using microscopic analysis . Also when crystalline admixtures, expansive agents, autogenous healing, promoted and stimulated autogenous healing with SAPs, microcapsules with bacteria and other healing agents, the combination of bacteria and SAPs, and sodium‐silicate saturated lightweight aggregates are studied, microscopic analysis can be used.…”

Section: Healing Efficiencymentioning

confidence: 99%

“…The composition and the elemental analysis can state something about the usefulness of the different types of bacteria studied. Studying the precipitated healing products with SEM/EDX was applied for crystalline admixtures and geomaterials, for autogenous healing, healing of lime mortars, healing through embedded microcapsules, healing by porous silica or lightweight aggregates as a capsule or carrier for chemical or biological healing agents, SAPs and expansive powder minerals, among others. All these healing techniques result in different products, being formed and/or precipitated.…”

Section: Healing Efficiencymentioning

confidence: 99%

“…This gives information about the constitutional elements of the material studied, i.e., the formed healing crystals. If a small powder sample can be extracted, X‐ray diffraction and/or Fourier transform infrared spectroscopy (FTIR) is also an option to study the formed healing products in autogenous healing and bacterial healing, as well as attenuated total reflectance (ATR) FTIR . XRD measures the angles and intensities of diffracted incident X‐ray beams to determine the molecular structure of a crystal.…”

Section: Healing Efficiencymentioning

confidence: 99%

See 2 more Smart Citations

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Snoeck

Malm

Cnudde

et al. 2018

Adv Materials Inter

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When studying the self‐healing properties of construction materials, a plethora of destructive and nondestructive testing (NDT) techniques can be used. In this review, the applicability of different nondestructive test methods is discussed in detail. The methods can be categorized whether they are used to study the encapsulation and/or protection mechanism of the healing agent, the sequestered healing agent itself, the distribution of healing agents, the trigger mechanism for healing, the healing efficiency, or healing performance. Based on this categorization, nondestructive techniques found in literature are discussed. In this way, a robust understanding of the different techniques can be used for future research on self‐healing construction materials.

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Section: Healing Efficiencymentioning

confidence: 99%

Section: Healing Efficiencymentioning

confidence: 99%

Section: Healing Efficiencymentioning

confidence: 99%

See 1 more Smart Citation

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Snoeck

Malm

Cnudde

et al. 2018

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…To compensate this drawback, adding mineral admixtures in cementitious materials seems to be a good option to promote the autogenous self-healing performances. Till now, the effect of various mineral additives i.e., silicabased materials [27], calcium sulfoaluminate based expansive agents [28] and crystalline components [29] on promoting the autogenous self-healing of cementitious has been investigated. For example, the maximum crack width of around 400µm found to be healed with expansive powder minerals contained glass capsule system.…”

Section: Mineral Mixture Based Self-healingmentioning

confidence: 99%

“…The expansive powder minerals are positioned in first layer of capsules, water is positioned in inner capsules. When the concentric glass macrocapsules are cracked, the released healing agent will interacts with [28] water and CO 2 and then different hydrated and carbonated products are formed, to seal and heal the cracks. The result shows that the addition of mineral admixture can promote the effect of autogenous self-healing in cementitious materials.…”

Section: Mineral Mixture Based Self-healingmentioning

confidence: 99%

A Review: Novel Routes towards the Realization of Self-Healing Function in Cementitious Materials

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Cementitious materials are the fundamental element in the field of civil construction. While due to its brittle nature, cracking of cementitious material at multi-scales could pose a threaten to the safety and durability of concrete structure. To solve this congenital problem, bio-mimic self-healing in cementitious materials was proposed and gradually demonstrated its great potential. In this review, two big categories of self-healing, autonomous and autogenous self-heaing, with its corresponding up-to-date healing stratergies were introduced. The merits and limits of different healing strategies were concluded. It is believed that this review could shed light to the realization of practical application self-healing concept in cementitious materials.

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Recent Advances in Intrinsic Self‐Healing Cementitious Materials

et al. 2018

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Self-healing is a natural phenomenon whereby living organisms respond to damage. Recently, considerable research efforts have been invested in self-healing cementitious materials that are capable of restoring structural integrity and mechanical properties after being damaged. Inspired by nature, a variety of creative approaches are explored here based on the intrinsic or extrinsic healing mechanism. Research on new intrinsic self-healing cementitious materials with biomimetic features is on the forefront of material science, which provides a promising way to construct resilient and sustainable concrete infrastructures. Here, the current advances in the development of the intrinsic healing cementitious materials are described, and a new definition of intrinsic self-healing discussed. The methods to assess the efficiency of different healing mechanisms are briefly summarized. The critical insights are emphasized to guide the future research on the development of new self-healing cementitious materials.

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Encapsulation of expansive powder minerals within a concentric glass capsule system for self-healing concrete

Cited by 137 publications

References 39 publications

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

A Review: Novel Routes towards the Realization of Self-Healing Function in Cementitious Materials

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

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