Self-Healing Phenomena in Cement-Based Materials

Abstract

Volume 11 RILEM, The International Union of Laboratories and Experts in Construction Materials, Systems and Structures, founded in 1947, is a non-governmental scientific association whose goal is to contribute to progress in the construction sciences, techniques and industries, essentially by means of the communication it fosters between research and practice. RILEM's focus is on construction materials and their use in building and civil engineering structures, covering all phases of the building process from manufacture to use and recycling of materials. More information on RILEM and its previous publications can be found on www.RILEM.net.The RILEM State-of-the-Art Reports (STAR) are produced by the Technical Committees. They represent one of the most important outputs that RILEM generateshigh level scientific and engineering reports that provide cutting edge knowledge in a given field. The work of the TCs is one of RILEM's key functions.Members of a TC are experts in their field and give their time freely to share their expertise. As a result, the broader scientific community benefits greatly from RILEM's activities.

Volume Fraction, Thickness, and Permeability of the Sealing Layer in Microbial Self-Healing Concrete Containing Biogranules

“…significant CaCO 3 precipitation was not observed in the first 14 days. Therefore, the healing in this period was attributed to other autogenous healing mechanisms, such as swelling of the crack walls and further hydration of non-hydrated dicalcium silicate (C 2 S) particles (de Rooij et al, 2013). The results of this study revealed that, in the first 2 weeks, the response of the biomortar to the presence of a crack is no different than a conventional mortar.…”

Autogenous self-healing of cement with expansive minerals-I: Impact in early age crack healing

“…Self-healing phenomenon in concrete was identified early in the mid-nineteenth century by Lauer and Slate [2] and the concept was gradually established by several researchers [3][4][5][6][7]. The healing processes in concrete are classified broadly into two principal groups, autonomic and autogenous healing [8]. In the former, healing agents are encapsulated into the concrete or composites.…”

Use of 3D printing to create multifunctional cementitious composites: review, challenges and opportunities

“…without human intervention. In the past 20 years, many different approaches for self-healing of concrete have been proposed [31,32]. Typically, two types of self-healing systems can be distinguished: capsule based systems, in which discrete capsules filled with self-healing agent are (randomly) dispersed in the cement matrix; and vascular systems, in which a connected network of channels is introduced in the cementitious matrix, with or without self-healing agent already stored in the network.…”