A review study on encapsulation‐based self‐healing for cementitious materials

Xue, Caihong; Li, Wengui; Li, Jianchun; Tam, Vivian W.Y.; Ye, Guang

doi:10.1002/suco.201800177

Cited by 76 publications

(29 citation statements)

References 104 publications

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“…This paper presents the results from a series of tests on an autonomic self-healing cementitious material (SHCM) system. The main motive for exploring such self-healing (SH) systems lies in the need to improve the durability of structures formed from cementitious materials [1], as elucidated in a number of recent review papers [2][3][4]. Much previous work on SHCMs has focussed on concrete, although SH systems have also been successfully applied to other cementitious materials such as mortar [5][6][7], fibre reinforced concrete [5,8] and engineered cementitious composites (ECCs) [9].…”

Section: Introductionmentioning

confidence: 99%

Mechanical response of a vascular self-healing cementitious material system under varying loading conditions

Selvarajoo

Davies

Freeman

et al. 2020

Construction and Building Materials

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The paper presents results from two groups of experimental tests on a pressurised vascular self-healing cementitious material system, in which low viscosity cyanoacrylate was employed as the healing-agent. The first group comprised three series of tests on plain concrete notched prismatic beams. These tests examined the effects on the mechanical response of varying the healing period, the rate of loading and the healingagent pressure. The second group involved two series of direct tension tests on doubly notched prismatic specimens, each of which had a different crack opening displacement during the healing period. In this second group of tests, healing was allowed to take place in cracks that were held stationary for a period of time, with the degree of mechanical healing being measured for different healing periods. The paper also presents a simplified damage-healing model that is used to interpret the test results and to bring clarity to the indices used to evaluate the degree of healing. The tests were designed to provide new data on simultaneous damage-healing behaviour as well as on the effects of varying pressure, static healing periods and cracking configurations on the mechanical response of this self-healing cementitious material (SHCM) system. These data have been used to guide the development of a new numerical model for SHCMs (reported elsewhere) and should be useful to others who are developing design procedures and/or computational models for similar material systems.

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Section: Introductionmentioning

confidence: 99%

Mechanical response of a vascular self-healing cementitious material system under varying loading conditions

Selvarajoo

Davies

Freeman

et al. 2020

Construction and Building Materials

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“…If subjected to concrete cracking, the embedded self-healing microcapsules tend to rupture, releasing the encapsulated healing agent. When the healing agent is exposed to the embedded catalyst, it polymerizes and works to seal and heal the cracks [ 98 ].…”

Section: Self-healing Polymers In Construction Applicationmentioning

confidence: 99%

“… Self-healing schematic concept for cementitious materials that are ( a ) crack forming, ( b ) healing agent releasing, and in ( c ) polymerization with catalysts [ 98 ]. Images obtained with permission from C. Xue, W. Li, J. Li, V.W.Y.…”

Section: Figurementioning

confidence: 99%

The Versatility of Polymeric Materials as Self-Healing Agents for Various Types of Applications: A Review

et al. 2021

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The versatility of polymeric materials as healing agents to prevent any structure failure and their ability to restore their initial mechanical properties has attracted interest from many researchers. Various applications of the self-healing polymeric materials are explored in this paper. The mechanism of self-healing, which includes the extrinsic and intrinsic approaches for each of the applications, is examined. The extrinsic mechanism involves the introduction of external healing agents such as microcapsules and vascular networks into the system. Meanwhile, the intrinsic mechanism refers to the inherent reversibility of the molecular interaction of the polymer matrix, which is triggered by the external stimuli. Both self-healing mechanisms have shown a significant impact on the cracked properties of the damaged sites. This paper also presents the different types of self-healing polymeric materials applied in various applications, which include electronics, coating, aerospace, medicals, and construction fields. It is expected that this review gives a significantly broader idea of self-healing polymeric materials and their healing mechanisms in various types of applications.

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“…Among the several techniques used to characterize the healing efficiency of a cementitious material, the recovery of the compressive strength, recovery of stiffness and the characterization of water absorption, water permeability and resistance to chloride penetration are the most widely studied (Huang et al 2016;Xue et al 2019;Amenta et al 2020bAmenta et al , 2021Van Mullem et al 2020). For maximizing the reliability of the results, microstructural analysis of the healing products formed inside the crack is considered useful.…”

Section: Large-scale Testsmentioning

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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A review study on encapsulation‐based self‐healing for cementitious materials

Cited by 76 publications

References 104 publications

Mechanical response of a vascular self-healing cementitious material system under varying loading conditions

Mechanical response of a vascular self-healing cementitious material system under varying loading conditions

The Versatility of Polymeric Materials as Self-Healing Agents for Various Types of Applications: A Review

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

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