Accession Number : ADA567701


Title :   Microencapsulation of Self-healing Concrete Properties


Descriptive Note : Master's thesis


Corporate Author : LOUISIANA STATE UNIV BATON ROUGE


Personal Author(s) : Gilford III, James


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a567701.pdf


Report Date : Aug 2012


Pagination or Media Count : 55


Abstract : Recent studies in the literature have demonstrated the ability of self-healing processes to be effective in enhancing the overall life of concrete. The main goal of this project is to evaluate and to control specific parameters for the production of an effective self-healing matrix that can be utilized within the application of self-healing concrete. Therefore, the project objective is to synthesize microcapsules using dicyclopentadine and sodium silicate and to evaluate the effects of pH, temperature, and agitation rate on microcapsule morphology. The microcapsule diameter, yield analysis, and shell thickness were characterized using scanning electron microscopy. During the experimental analysis, it was determined that temperature possesses a direct relationship with the pH for both sodium silicate and DCDP. As the temperature increased during the trials, the pH decreased. Temperature had a direct impact on the forming of the wall and core during the interfacial polymerization phase. Although the ability to maintain this consistency with the pH is important and essential, agitation rate is the key factor that controls the microcapsule capsule diameter size.


Descriptors :   *CONCRETE , ENCAPSULATION , PH FACTOR , SHELLS(STRUCTURAL FORMS) , SODIUM SILICATES , TEMPERATURE , THICKNESS


Subject Categories : Structural Engineering and Building Technology


Distribution Statement : APPROVED FOR PUBLIC RELEASE