Past and present techniques of self-healing in cementitious materials: A critical review on efficiency of implemented treatments

Danish, Aamar; Mosaberpanah, Mohammad Ali; Salim, Muhammad Usama

doi:10.1016/j.jmrt.2020.04.053

Cited by 77 publications

(44 citation statements)

References 93 publications

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“…Self-healing of cement-based materials is not an entirely new problem. In 1836, self-healing in water-retaining structures was reported by the French Academy of Sciences; the hydration of cement-paste-like calcium carbonate or polyacrylic hydrogel was utilized for repairing cracks in cementitious materials [ 34 , 35 , 36 , 37 , 38 ]. This approach has now been extended to treating cracks with a size from a few microns to the millimeter scale, thus achieving a more practical use in real structures.…”

Section: Self-healing In Cement-based Materialsmentioning

confidence: 99%

Self-Healing Structural Materials

Yoon

Lee

2021

Polymers

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Self-healing materials have been developed since the 1990s and are currently used in various applications. Their performance in extreme environments and their mechanical properties have become a topic of research interest. Herein, we discuss cutting-edge self-healing technologies for hard materials and their expected healing processes. The progress that has been made, including advances in and applications of novel self-healing fiber-reinforced plastic composites, concrete, and metal materials is summarized. This perspective focuses on research at the frontier of self-healing structural materials.

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Section: Self-healing In Cement-based Materialsmentioning

confidence: 99%

Self-Healing Structural Materials

Yoon

Lee

2021

Polymers

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“…Self-healing can potentially have a great impact upon the durability of concrete structures, especially on those exposed to severe conditions. Within the last few decades, significant research has been done to improve the knowledge of the relevant mechanisms, and to develop new concepts and techniques [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. We can now identify three major self-healing processes/techniques: autogenous self-healing, encapsulated autonomous self-healing and self-healing bio-concrete.…”

Section: Introductionmentioning

confidence: 99%

Early Age Sealing Capacity of Structural Mortar with Integral Crystalline Waterproofing Admixture

et al. 2021

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Crystalline admixtures embedded in concrete may react in the presence of water and generate thin crystals able to fill pores, capillaries and micro-cracks. Once the concrete has dried, the crystalline chemicals sit dormant until another dose of water starts the crystallization again. The research aims to analyses the early age self-sealing effect of a crystalline admixture at a dosage rate of 1–3% of the cement mass. Specimens made with two types of gravel were pre-loaded with three-point bending to up to 90% of the ultimate capacity, and conditioned through wet–dry cycles. Micro-crack closure was measured with a microscope after pre-loading, and after 1 day, 4 days, 8 days, 14 days and 20 days of wet–dry exposure. The results show that an admixture content of 3% achieves the best early self-sealing performance. These results are also confirmed by probabilistic analyses, which also emphasize the self-sealing potential of lower ICW contents.

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“…The development of self-healing cements has been proposed as an innovative approach for enhancing the durability of conventional cement and prolonging the service life of critical concrete structures Huang et al 2016;De Belie et al 2018;Danish et al 2020;Zhang et al 2020). To this direction, encapsulated healing agents have attracted the interest of research community and industry, due to the long-term protection of the healing agent, until crack formation.…”

Section: Introductionmentioning

confidence: 99%