Three-part methylmethacrylate adhesive system as an internal delivery system for smart responsive concrete

Dry, Carolyn; McMillan, William

doi:10.1088/0964-1726/5/3/007

Cited by 170 publications

(84 citation statements)

References 5 publications

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“…Where the composite was not notched, the fiber remained intact and could be filled with peroxide. On the side, where the filling with peroxide was executed, the composite plate was not notched (4). The preparation of the specimens begun with saw-cutting yielding the "notches", so unnotched sections remained (4).…”

Section: Filling Of the Hollow Glass Fiber Reinforced Composites Withmentioning

confidence: 99%

“…On the side, where the filling with peroxide was executed, the composite plate was not notched (4). The preparation of the specimens begun with saw-cutting yielding the "notches", so unnotched sections remained (4). The width of each unnotched section was 3 mm and the distance between them was 22 mm.…”

Section: Filling Of the Hollow Glass Fiber Reinforced Composites Withmentioning

confidence: 99%

“…The healing liquid flows into the crack and restores the connection between the broken parts [2]. Selfrepair and damage assessment are of interest for concrete parts [3,4], polymers [5,6] and 3 related composites, as well [7][8][9][10]. Hollow fibers may also contain different "indicator" liquids, which can help us to detect the damage development.…”

Section: Introductionmentioning

confidence: 99%

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Damage detection and self-repair in hollow glass fiber fabric-reinforced epoxy composites via fiber filling

Kling

Czigány

2014

Composites Science and Technology

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2Hollow glass fiber reinforced epoxy matrix composites were produced to study whether the damage development can be followed and the self-repair can triggered by filling the fibers with suitable additives. Composite plates were manufactured by the hand layup and vacuum assisted resin transfer molding techniques. To detect subcritical transverse impact damage, hollow fibers were filled with an ultraviolet fluorescent dye, whereas for selfrepair, they were filled with a polyester resin along with the corresponding accelerator. The healing process was induced at different temperatures and continued for different durations. It was demonstrated that the targeted damage detection and self-repair can be achieved using thin (10-13 µm outer diameter) reinforcing hollow fibers. The selfrepairing ability was demonstrated in three point bending tests and the healing was confirmed by inspection with scanning electron microscopy.

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Section: Filling Of the Hollow Glass Fiber Reinforced Composites Withmentioning

confidence: 99%

Section: Filling Of the Hollow Glass Fiber Reinforced Composites Withmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Damage detection and self-repair in hollow glass fiber fabric-reinforced epoxy composites via fiber filling

Kling

Czigány

2014

Composites Science and Technology

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“…Within this research area, different mechanisms are under development. The most common ones use encapsulated polymers (Dry and McMillan 1996;Thao et al 2009;Van Tittelboom et al 2011), calcium carbonate precipitating bacteria (Wiktor and Jonkers 2011;Van Tittelboom et al 2010;Wang et al 2012), or embedded hydrogels (Dennis Lee et al 2010;Kim and Schlangen 2010;Snoeck et al 2013) as healing/sealing agents. The current paper describes a preliminary study to evaluate whether alkaline activators can be used as healing agents in order to obtain self-healing in special types of concrete such as those containing large amounts of unhydrated fly ash (FA) or blast-furnace slag (BFS) particles.…”

Section: Introductionmentioning

confidence: 99%

Activation of Pozzolanic and Latent-Hydraulic Reactions by Alkalis in Order to Repair Concrete Cracks

Gruyaert

Tittelboom

Rahier

et al. 2015

J. Mater. Civ. Eng.

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Abstract:The low degree of hydration of fly ash (FA) and slag (BFS) particles in high-volume FA and BFS concrete offers the possibility to activate the unreacted particles upon crack formation to close the crack. In this paper, a preliminary study is performed to evaluate the use of alkaline activators to stimulate the formation of reaction products in the crack. First, the reaction rates of crushed pastes mixed with alkaline solutions or water were monitored by calorimetry. These tests showed that alkaline activators stimulate the reactions more than water. Secondly, cracked mortar beams were stored in different alkaline solutions or water and the crack self-closing ratio was calculated after microscopic investigation at different time intervals. The results indicated that reference mixes, containing only ordinary portland cement as binder, heal very well autogenously, while a solution of CaðOHÞ 2 þNa 2 CO 3 seems to be the most suitable activator to stimulate crack closing of BFS concrete. Thirdly, the regain in strength due to healing of the cracks was determined. Compared to other self-healing techniques, strength regain is limited (about 10-40%).

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“…For autonomous healing in a composite material self-healing capabilities are achieved by the release of encapsulated repair-agent as a result of cracking from the onset of damage. When cracks happen, the capsules containing self-healing compounds within the concrete material break and the healing agent is released to heal the cracks (10)(11)(12)(13)(14)(15). Generally, autogenous healing has more advantages than autonomous healing, like economics which is extremely important for the highly cost-sensitive construction industry (4,16).…”

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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Three-part methylmethacrylate adhesive system as an internal delivery system for smart responsive concrete

Cited by 170 publications

References 5 publications

Damage detection and self-repair in hollow glass fiber fabric-reinforced epoxy composites via fiber filling

Damage detection and self-repair in hollow glass fiber fabric-reinforced epoxy composites via fiber filling

Activation of Pozzolanic and Latent-Hydraulic Reactions by Alkalis in Order to Repair Concrete Cracks

Overview of recent work on self-healing in cementitious materials

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