Routes and mechanisms towards self healing behaviour in engineering materials

Zwaag, Sybrand van der

doi:10.2478/v10175-010-0022-6

Cited by 25 publications

(21 citation statements)

References 45 publications

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“…It is worth here remarking that a lot of studies in the last decade has been dedicated to the self-healing capacity of cement based materials [11,12] and several authors have investigated tailored additives or techniques purposely designed to enhance this capacity [13]. As a matter of fact the self-healing capacity depends on several factors, such as the mix composition of the matrix, the age of damage, the damage level, the external conditions (temperature, moisture) and the curing time [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of age and level of damage on the autogenous healing of lime mortars

Nardi

Cecchi

Ferrara

et al. 2017

Composites Part B: Engineering

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Natural hydraulic lime-based mortars are recommended for retrofitting operations in historical buildings, primarily because of their high chemical-physical and mechanical compatibility; moreover, because their autogenous and engineering self-healing capacities. This work proposes a methodology to quantify the autogenous self-healing in terms of recovery of the compression strength and ultrasonic pulse velocity in samples made of natural hydraulic lime mortars; specimens were pre-cracked at different ages (14 -84 days) and levels of damage (70% of the compression strength in pre-peak regime; 90% of the compression strength in post-peak regime), and then cured under water up to 28 days. The capacity of healing after two loading/healing cycles has been also investigated. An interdisciplinary approach has been pursued characterising the mechanical aspects of the healing and the chemical nature of the products via SEM/EDS analyses. The results have provided useful indication about the dependence of the self-healing capacity on the aforementioned variables. Keywordsautogenous self-healing, compressive strength, UPV, lime-based mortar Manuscript region of origin Europe Corresponding AuthorCristina De Nardi Authors, active in the self-healing materials fields, have been recently published in a proceedings conference, non-indexed periodical; however the authors ensure that no data or results in the manuscript has been published before in any form. Order of AuthorsIn this paper, we report on dependency of autogenous self-healing capacity of lime-based mortars on different variables: age and level of damage. An interdisciplinary approach has been pursued characterising the mechanical aspects of the healing and the chemical nature of the products via SEM/EDS analyses.It is authors' belief that only the analysis of the whole set of results, as presented in the manuscript we are submitting for publication, can allow a clear understanding of the autogenous healing phenomenon.Thank you for receiving our manuscript and considering it for review. We appreciate your time and look forward to your response.Yours sincerely Cristina De Nardi This work proposes a methodology to quantify the autogenous self-healing in terms of recovery of the compression strength and ultrasonic pulse velocity in samples made of natural hydraulic lime mortars; specimens were pre-cracked at different ages (14 -84 days) and levels of damage (70% of the compression strength in pre-peak regime; 90% of the compression strength in post-peak regime), and then cured under water up to 28 days.The capacity of healing after two loading/healing cycles has been also investigated.An interdisciplinary approach has been pursued characterising the mechanical aspects of the healing and the chemical nature of the products via SEM/EDS analyses.The results have provided useful indication about the dependence of the self-healing capacity on the aforementioned variables.

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Section: Introductionmentioning

confidence: 99%

Effect of age and level of damage on the autogenous healing of lime mortars

Nardi

Cecchi

Ferrara

et al. 2017

Composites Part B: Engineering

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“…Mendable polymers are an emerging family of resins that when damaged can be repaired simply and conveniently through the application of heat, irradiation or some other external stimuli [1][2][3][4]. When activated, a reversible chemical reaction or physical process forms new bonds that restore somewhat the properties of the damaged polymer.…”

Section: Introductionmentioning

confidence: 99%

An efficient healing agent for high temperature epoxy composites based upon tetra-glycidyl diamino diphenyl methane

Pingkarawat

Dell’Olio

Varley

et al. 2015

Composites Part A: Applied Science and Manufacturing

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“…Due to the attractive potential and practical value, self-healing materials have been intensely investigated over the last 10 years and a significant increase in the number of scientific publications was accompanied (17)(18)(19). Evidence of self-healing to material design was apparent at the first international conference on self-healing materials which was held in the Netherlands during April 2007.…”

Section: Introductionmentioning

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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Routes and mechanisms towards self healing behaviour in engineering materials

Cited by 25 publications

References 45 publications

Effect of age and level of damage on the autogenous healing of lime mortars

Effect of age and level of damage on the autogenous healing of lime mortars

An efficient healing agent for high temperature epoxy composites based upon tetra-glycidyl diamino diphenyl methane

Overview of recent work on self-healing in cementitious materials

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