Self-healing concrete-What Is it Good For?

Roig-Flores, Marta; Formagini, Sidiclei; Ros, Pedro Serna

doi:10.3989/mc.2021.07320

Cited by 17 publications

(4 citation statements)

References 130 publications

(241 reference statements)

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“…Thus, concrete used for the construction of bridges, roads or buildings is prone to cracking during the lifetime of these structures [12]. Equipping concrete with a self-healing function is one way to ensure the structural integrity of buildings without costly and time-consuming maintenance and repair, as the material is able to close the damage zone without external intervention [13]. Here, it should be noted that cementitious materials-without a particular modification-can autonomously heal cracks, albeit at a limited crack size (<50 µm) [14].…”

Section: Self-healing Concretementioning

confidence: 99%

Smart Materials for Green(er) Cities, a Short Review

et al. 2023

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The transition to sustainable or green(er) cities requires the development and implementation of many innovative technologies. It is vital to ensure that these technologies are themselves as sustainable and green as possible. In this context, smart materials offer excellent prospects for application. They are capable of performing a number of tasks (e.g., repair, opening/closing, temperature measurement, storage and release of thermal energy) without embedded electronics or power supplies. In this short review paper, we present some of the most promising smart material-based technologies for sustainable or green(er) cities. We will briefly present the state-of-the-art in smart concrete for the structural health monitoring and self-healing of civil engineering structures, phase-change materials (PCM) for passive air-conditioning, shape-memory materials (SMA) for various green applications, and meta-surfaces for green acoustics. To better illustrate the potential of some of the solutions discussed in the paper, we present, where appropriate, our most recent experimental results (e.g., embedded SAW sensors for the Structural Health Monitoring of concrete structures). The main aim of this paper is to promote green solutions based on smart materials to engineers and scientists involved in R&D projects for green(er) cities.

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Section: Self-healing Concretementioning

confidence: 99%

Smart Materials for Green(er) Cities, a Short Review

et al. 2023

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“…Con relación a la durabilidad de la edificaciones, hoy en día muchos reglamentos o códigos establecen periodos mínimos de 50 años para la vida útil de la estructuras, sin embargo un incidente común es que cuando los elementos estructurales resultan agrietados por causas diversas, la vida útil o de servicio se ve reducida por el ingreso de agentes exógenos que pueden propiciar el inicio de la corrosión del acero de refuerzo y si no se genera el debido mantenimiento con ello conducir a una falla del elemento estructural, en ese sentido nuevos materiales como el concreto auto-reparable tiene como principal función el de auto-reparar fisuras con aberturas de alrededor de 0.9 mm (Wang, 2014), en este caso el mecanismo de auto-reparación involucra la hidratación continua de la matriz cementante o también la carbonatación mediante la cual los cristales de carbonato de calcio precipitan sobre la superficies de las fisuras como resultado de las reacciones químicas entre los iones calcio (Ca 2+ ) y el dióxido de carbono (CO2) que se encuentra disponible en el agua alojada en el interior de la fisura (Roig , 2021, Magdalena , 2019. Ver figura 1.…”

Section: Concretos Autoreparablesunclassified

Estado del desarrollo y aplicaciones de la tecnología del concreto

Yépez

Herrera

Aviña

2022

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El concreto es uno de los materiales más utilizados en la industria de la construcción esto debido a la fácil consecución de los materiales que lo conforman y a su facilidad de fabricación. El estado actual de la tecnología de este material se ha podido alcanzar por la gran cantidad de trabajos que se han desarrollado previamente en los diferentes materiales que lo integran, lo que ha permitido entender el funcionamiento de dichos componentes cuando al combinarse producen el concreto que se conoce hoy en día, en ese sentido en este trabajo se muestra la evolución del avance de los materiales con los cuales se fabrica el material hasta llegar a las características y aplicaciones de los concretos especiales que se usan actualmente.

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“…In the literature there are concretes with different characteristics from the classical ones, namely concretes with different self-healing mechanisms [7]. Depending on the mechanisms of self-healing of the concrete, represented schematically in Fig.…”

Section: Introductionmentioning

confidence: 99%

Research on the production of cement composites with autonomous self-healing performance

Panfil Toader,

Mircea,

Hegyi

et al. 2022

MATEC Web Conf.

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In a time when the attention paid to identifying the possibilities of reducing problems due to urban pollution is increasing, the construction industry has a lot to gain if it aligns itself with the new trends of sustainable development in the field. In this context, the objective of obtaining a concrete with self-healing properties of cracks is more than appropriate, becoming a sustainable alternative for reducing the maintenance costs of transport infrastructure by increasing their operating time and by decreasing the need for the volume of repair and maintenance works, thus indirectly contributing to the reduction of environmental pollution. Preliminary results obtained using a cementitious composite with waterproofing admixture content by mass crystallization are encouraging by identifying the existence of an autonomous healing degree (closure of cracks with average opening 20-40 µm) in a proportion of at least 65% after only 96 hours of exposure in a wet-dry environment, respectively and of at least 96% after 480 hours of conditioning. The degree of novelty and value of this research is mainly due to the approach of this type of composite produced by adapting the general principles to local raw materials, including the use of specific industrial waste and by-products available in Romania (fly ash and limestone slurry).

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Self-healing concrete-What Is it Good For?

Cited by 17 publications

References 130 publications

Smart Materials for Green(er) Cities, a Short Review

Smart Materials for Green(er) Cities, a Short Review

Estado del desarrollo y aplicaciones de la tecnología del concreto

Research on the production of cement composites with autonomous self-healing performance

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