Journal ArticleDOI
Influence of curing condition and precracking time on the self-healing behavior of Engineered Cementitious Composites
TLDR
In this article, the authors investigated the self-healing behavior of Engineered Cementitious Composites (ECC) with focus on the influence of curing condition and precracking time.Abstract:
This paper investigates the self-healing behavior of Engineered Cementitious Composites (ECC) with focus on the influence of curing condition and precracking time. Four-point bending tests were used to precrack ECC beams at different age, followed by different curing conditions, including air curing, 3% CO 2 concentration curing, cyclic wet/dry (dry under 3% CO 2 concentration) curing and water curing. For all curing conditions, deflection capacity after self-healing can recover or even exceed that from virgin samples with almost all precracking ages. After self-healing, flexural stiffness was also retained significantly compared with that from virgin samples, even though the level of retaining decreases with the increase of precracking time. The flexural strength increases for samples pre-cracked at the age of 14 days and 28 days, presumably due to continuous hydration of cementitious materials afterwards. Furthermore, it is promising to utilize nanoclay as distributed internal water reservoirs to promote self-healing behavior within ECC without relying on external water supply.read more
Citations
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Journal ArticleDOI
Quantification of crack-healing in novel bacteria-based self-healing concrete
Virginie Wiktor,Henk M. Jonkers +1 more
TL;DR: In this article, a two-component bio-chemical self-healing agent consisting of bacterial spores and calcium lactate is released from the particle by crack ingress water, which results in physical closure of micro cracks.
Journal ArticleDOI
Self-Healing in Cementitious Materials—A Review
Kim Van Tittelboom,Nele De Belie +1 more
TL;DR: A review of self-healing in concrete can be found in this article, where the types of healing agents and capsules used are evaluated based on the trigger mechanism used and attention has been paid to the properties regained due to selfhealing.
Journal ArticleDOI
A review : Self-healing in cementitious materials and engineered cementitious composite as a self-healing material
TL;DR: In this paper, a review of the possible mechanisms for self-healing phenomenon in cementitious materials, which are summarized based on substantial experimental studies and practical experience, are reviewed.
Journal ArticleDOI
Self-healing of surface cracks in mortars with expansive additive and crystalline additive
TL;DR: In this paper, the authors studied the self-healing potential of cement-based materials incorporating calcium sulfoaluminate based expansive additive (CSA) and crystalline additive (CA).
Journal ArticleDOI
A self-healing cementitious composite using oil core/silica gel shell microcapsules
TL;DR: In this article, a new family of self-healing materials that hold promise for crack-free concrete or other cementitious composites is presented. And the selfhealing effect is evaluated using permeability measurements along with a fatigue test under uniaxial compression cyclic loading and further confirmed by surface analytical tools including optical microscope and field emission scanning electron microscope coupled with energy-dispersive X-ray analyzer (FESEM/EDX).
References
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Journal ArticleDOI
On Engineered Cementitious Composites (ECC)
TL;DR: A survey of the research and development of Engineered Cementitious Composites (ECC) over the last decade since its invention in the early 1990's is presented in this paper.
Journal ArticleDOI
Self‐Healing Materials
TL;DR: In this article, the design and generic principles of self-healing materials through a wide range of different material classes including metals, ceramics, concrete, and polymers are discussed and evaluated.
Journal ArticleDOI
Water Permeability and Autogenous Healing of Cracks in Concrete
TL;DR: In this paper, the authors investigated the effect of self-healing in cracks on the functional reliability of structures subjected to water-pressure loads and showed that the formation of calcite in the crack is almost the sole cause for the autogenous healing.
Journal ArticleDOI
Autogenous healing of engineered cementitious composites under wet–dry cycles
TL;DR: In this article, the authors investigated self-healing of Engineered Cementitious Composites (ECC) subjected to two different cyclic wetting and drying regimes and found that ECC recovered 76% to 100% of its initial resonant frequency value and attained a distinct rebound in stiffness.
Journal ArticleDOI
Durability properties of micro-cracked ECC containing high volumes fly ash
Mustafa Şahmaran,Victor C. Li +1 more
TL;DR: In this article, the effect of FA on the durability of Engineered Cementitious Composites (ECC) was evaluated after 28 days of curing and accelerated aging, and direct tensile tests were performed to evaluate the impact of deterioration on the tensile strength, tensile strain capacity and crack width.
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