Effect of cement powder based self-healing solid capsule on the quality of mortar

Oh, Sung-Rok; Choi, Yun Wang; Kim, Yong Jic

doi:10.1016/j.conbuildmat.2019.04.123

Cited by 19 publications

(12 citation statements)

References 11 publications

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“…The manufacturing process of the SC consists of three steps: mixing healing materials ( Figure 1 a), granulating the healing materials ( Figure 1 b), and coating and drying SC ( Figure 1 c). The mixing ratio of CSA to CaSO 4 was 70:30, following the previous study [ 16 ], and SC ranging from 0.85 to 1.2 mm were used to produce the self-healing repair mortar [ 15 , 16 ]. The surface of SC was coated by spraying polyurethane to delay the reaction of the core material.…”

Section: Materials and Test Methodsmentioning

confidence: 99%

“…Self-healing technology using capsules, which can contain a large amount of self-healing substances, has the advantage of selectively reacting to cracks. Self-healing capsules can be classified into solid capsules (SC) coated with a film, which are made by agglomeration of the powdery material [ 15 , 16 ], and microcapsules or macrocapsules encapsulated by a chemical method [ 11 , 17 ]. Accordingly, the capsule utilization technology can provide self-healing performance by employing a different reaction mechanism depending on the target material, and an appropriate core material phase can be selected [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Oh¹,

Lee

Choi

et al. 2022

Materials

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Self-healing cement composites are generally produced by using materials such as inorganic powders, bacteria pellets, and microcapsules. Among them, inorganic powder-type healing materials tend to decrease in healing performance over time because they react relatively quickly. Accordingly, this study encapsulated self-healing inorganic reactive powders in solid capsules (SC) in order to delay their reaction. The capsule surface was coated with a membrane to prevent moisture from permeating it. SC were utilized to provide the self-healing effect to the repair mortar. SC were mixed at three rates (0%, 5%, and 10%) by the binder mass of the repair mortar. The fundamental properties, including rheology, table flow, strength, and length change, and the self-healing performance of the self-healing repair mortar mixes were investigated. It was found that the rheological and mechanical properties of the repair mortar decreased slightly as the amount of SC increased. On the other hand, for a crack width of 0.25 mm and crack inducing age of 28 days, the healing performance of repair mortar specimens containing SC was at least 20 pt% better than that of plain repair mortar after a healing period of 28 days.

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Section: Materials and Test Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Oh¹,

Lee

Choi

et al. 2022

Materials

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“…The dispersion coefficient α was calculated as an exponent of ( ) x ϕ − according to the following equation (Torigoe et al 2003;Oh et al 2019)…”

Section: Distribution Of Capsules In the Cement Matrixmentioning

confidence: 99%

Critical Aspects in the Development and Integration of Encapsulated Healing Agents in Cement and Concrete

Papaioannou

Amenta

Kilikoglou

et al. 2021

ACT

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“…[ 43] This work researched self-healing coatings for reinforcing steel to introduce an autonomous healing system for damaged coatings. [44] In this study self-healing solid capsules were produced using cement powder for the self-healing of cracks of concrete structure.…”

Section: [42]mentioning

confidence: 99%

Application of self-healing materials in architecture and construction industry: an exploratory review

2020

JXAT

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This work's aim was to perform a review of the scientific literature from the standpoint of both the architect and builder. In the first place, on which self-healing materials are currently available for construction industry; secondly, to acknowledge the main applications and the self-healing methods of each material. The review was largely carried out using the scientific database tool sciencedirect ® and other similar tools on the main applications of self-healing materials in construction industry. The results reveal that the main applications refer to the production of self-healing concretes and mortars by means of self-healing techniques, for example: insertion of microcapsules with various self-healing agents, followed by self-healing bacteria. It is concluded that with the use of these materials not only does the service life of structures of buildings improves, but also that of the entire building, increasing durability and noticeably decreasing maintenance and reparation costs.

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Effect of cement powder based self-healing solid capsule on the quality of mortar

Cited by 19 publications

References 11 publications

Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Critical Aspects in the Development and Integration of Encapsulated Healing Agents in Cement and Concrete

Application of self-healing materials in architecture and construction industry: an exploratory review

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