Self-healing of cement-based composites by use of micro-encapsulated polymeric agents


Uzum O., Andic-Cakir O. , ALVER N. , Saltan F., AKAT H.

EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1080/19648189.2021.2003249
  • Title of Journal : EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
  • Keywords: Self-healing, cement-based composites, glycidyl methacrylate, poly(melamine-formaldehyde), acoustic emission method, CONCRETE, COMPRESSION, MICROENCAPSULATION, PERMEABILITY, STRENGTH, DAMAGE

Abstract

Depending on the type of intended use, structural elements require a long time and higher initial investment costs to be manufactured/constructed in comparison to other industrial goods. In order to provide longer service lives for buildings, the durability of concrete is the first characteristic to be provided. Since the nature of cementitious materials tends to crack due to their lower tensile strength, it is required to suggest promising methods to intervene in crack propagation at early ages of the material. In this study the efficiency of a differently incorporated polymeric healing agent was investigated. Glycidyl methacrylate (GMA) as a healing agent was incorporated into cement mortar specimens by means of microspheres and glass pipettes. To determine the degree of healing mechanical tests, Ultrasonic Pulse Velocity (UPV) tests are performed, while the Acoustic Emission (AE) method was adapted to confirm the breakage of the glass pipettes during the controlled damage step on 7th day. UPV measurements show that the effective healing degrees of bending specimens are 7.13% and 0.54% for GMA containing poly(melamine formaldehyde) (PMF) microspheres and glass pipettes, respectively.