Analytical models for determining the dosage of capsules embedded in self-healing materials

Lv, Zhong; Chen, Huisu

doi:10.1016/j.commatsci.2012.09.032

Cited by 50 publications

(43 citation statements)

References 27 publications

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“…Additionally, a theoretical solution for determining the dosage of healing capsules was developed based on the concept of integral geometry in which capsules are randomly dispersed in the matrix and discrete cracks with a finite size are independently created [191]. The geometric probability that a crack encounters one or more capsules randomly embedded within a two-dimensional surface and a three-dimensional matrix was also considered.…”

Section: Microcapsule Content Required For Self-healingmentioning

confidence: 99%

“…[191]. The volume fraction of capsules required in self-healing materials was estimated for regular crack patterns in which the spacing was assumed to be either excessively large or larger than that of the pre-embedded capsules.…”

Section: Microcapsule Content Required For Self-healingmentioning

confidence: 99%

“…However, this finding contradicts that reported in ref. [191], probably because of the different boundary conditions applied. Regardless, the performance of the final material should be related to the probability of capsules colliding with crack.…”

mentioning

confidence: 96%

See 2 more Smart Citations

Self-healing polymeric materials based on microencapsulated healing agents: From design to preparation

Zhu

Rong

Zhang

2015

Progress in Polymer Science

489

235

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Section: Microcapsule Content Required For Self-healingmentioning

confidence: 99%

Section: Microcapsule Content Required For Self-healingmentioning

confidence: 99%

See 1 more Smart Citation

Self-healing polymeric materials based on microencapsulated healing agents: From design to preparation

Zhu

Rong

Zhang

2015

Progress in Polymer Science

489

235

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“…The mechanical properties of this interface have received less attention, and its properties have not been the main object of mechanical characterization. However, the current interest in this self-healing strategy is leading to an increase of theoretical and numerical works with the aim of getting a better understanding of its mechanisms and determining the key factors to improve efficiency and feasibility [8,[21][22][23][24][25][26][27]. These models assume either perfect bonding or a certain range of typical values of the interface properties, which are selected as a function of mechanical similarities given by composition or the degree of brittleness [28,29].…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Determination of strength and debonding energy of a glass-concrete interface for encapsulation-based self-healing concrete

Gilabert

Tittelboom

Tsangouri

et al. 2017

Cement and Concrete Composites

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This paper presents a combined experimental-numerical analysis to assess the strength and fracture toughness of a glass-concrete interface. This interface is present in encapsulation-based self-healing concrete. There is absence of published results of these two properties, despite their important role in the correct working of this self-healing strategy. Two setups are used: uniaxial tensile tests to assess the bonding strength and four point bending tests to get the interfacial energy. The complementary numerical models for each setup are conducted using the finite element method. Two approaches are used: cohesive zone model to study the interface strength and the virtual crack closure technique to analyze the interfacial toughness. The models are validated and used to verify the experimental interpretations. It is found that a glass-concrete interface can develop a maximum strength of approximately 1 N/mm 2 with fracture energy of 0.011 J/m 2 .

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“…The authors also presented the hitting probability model of a crack intersecting with capsules when cracks randomly occurred and capsules with healing agent were disorderly dispersed in the matrix (93). These theoretical mo dels and analytical solutions were expected to quantitatively characterize the self-healing efficiency of unhydrated cement nuclei or dosage of healing agent required and to be facilitating the experimental research.…”

Section: Modelling and Simulation Contributing To Self-healingmentioning

confidence: 99%

Overview of recent work on self-healing in cementitious materials

Lv¹,

Chen²

2014

Mater. construcc.

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ABSTRACT:Cracks, especially microcracks, in concrete are of paramount importance to the durability and the service life of cementitious composite. However, the self-healing technology, including autogenous healing and autonomous healing, is expected to be one of effective tools to overcome this boring problem. In this paper, we focus on the autogenous healing of concrete material and a few of recent works of autonomous healing are also mentioned. The durability and the mechanical properties improved by the self-healing phenomenon are reviewed from experimental investigation and practical experience. Several aspects of researches, such as autogenous healing capability of an innovative concrete incorporated geo-materials, self-healing of engineered cementitious composite and fire-damaged concrete, effect of mineral and admixtures on mechanism and efficiency of self-healing concrete are summarized to evaluate the presented progresses in the past several years and to outline the perspective for the further developments. Moreover, a special emphasis is given on the analytical models and computer simulation method of the researches of self-healing in cementitious materials. RESUMEN: Panorámica de trabajos recientes sobre materiales cementantes autorreparables.Las fisuras, y sobre todo las microfisuras, tienen una gran repercusión en la durabilidad y en la vida útil de los materiales cementantes. Ante este problema, la tecnología de la autorreparación, tanto autógena como autónoma, se presenta como una solución eficaz. El artículo se centra en la reparación autógena del hormigón, así como en algunos trabajos recientes sobre la reparación autónoma. Se describen las mejoras de las propiedades de durabilidad y de resistencia que proporciona la técnica del hormigón autorreparable, tanto desde el punto de vista de la investigación experimental como del de la experiencia práctica. A fin de evaluar los avances logrados en los últimos años y de trazar las grandes líneas de desarrollo futuro, se resumen varios de los aspectos investigados: capacidad de reparación de un hormigón innovador que incorpora geomateriales; autorreparabilidad tanto de los compuestos cementantes tecnológicos como de los hormigones que han sufrido daños por incendio; influencia de los aditivos minerales en el mecanismo y eficacia del hormigón autorreparable. Además, se destaca el papel de los modelos analíticos y los métodos de simulación informática en la investigación de los materiales cementantes autorreparables.

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Analytical models for determining the dosage of capsules embedded in self-healing materials

Cited by 50 publications

References 27 publications

Self-healing polymeric materials based on microencapsulated healing agents: From design to preparation

Self-healing polymeric materials based on microencapsulated healing agents: From design to preparation

Determination of strength and debonding energy of a glass-concrete interface for encapsulation-based self-healing concrete

Overview of recent work on self-healing in cementitious materials

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