SPECIAL ISSUE ON THE 12TH INTERNATIONAL SYMPOSIUM ON STRUCTURAL ENGINEERING (ISSE-2012)No Access

A MICROCAPSULE TECHNOLOGY BASED SELF-HEALING SYSTEM FOR CONCRETE STRUCTURES

Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, The Key Laboratory on Durability of Civil Engineering in Shenzhen, School of Civil Engineering, Shenzhen University, Shenzhen 518060, P. R. China

Search for more papers by this author

NINGXU HAN

Search for more papers by this author

MING ZHANG

Search for more papers by this author

XIANFENG WANG

Search for more papers by this author

HONGZHI CUI

Search for more papers by this author

, and

FENG XING

Corresponding author.

Search for more papers by this author

https://doi.org/10.1142/S1793431113500140Cited by:35 (Source: Crossref)

Abstract

In the study, a novel microcapsule technology based self-healing system for concrete structures has been developed. Through situ-polymerization reaction, the microcapsule is formed by urea formaldehyde resin to pack the epoxy material, which is applied to cementitious composite to achieve self-healing effect. The experimental results revealed that the self-healing efficiency of the composite can be accessed from the recovery of the permeability and strength for the cracked cementitious specimens as the healing agent in the microcapsule acting on the cracks directly. Scanning electronic microscope (SEM/EDX) results show that the epoxy resin is released along with the cracking of the cementitious composite and prevent from cracks continued growth. Further studies show that the self-healing efficiency is affected by the pre-loading of composite, particle size of microcapsule, aging duration of healing agent and so on.

Keywords:

References

E. N. Brown, M. R. Kessler and N. R. Sottos, J. Microencaps. 20(6), 719 (2003), DOI: 10.3109/02652040309178083. Crossref, Web of Science, Google Scholar
D. Cui, H. N. Li and G. B. Song, J. Dis. Preven. Mitigat. Eng. 25(1), 86 (2005). Web of Science, Google Scholar
C. Dry, Smart Mater. Struct. 3(2), 118 (1994), DOI: 10.1088/0964-1726/3/2/006. Crossref, Google Scholar
C. Dry , Fracture Mechanics: 25th Volume, ASTM STP 1220 , American Society of Testing and Materials , eds. F. Erdogan and J. H. Ronald ( Philadelphia, PA , 1994 ) . Google Scholar
Edvardsen, C. K. [1999] Wasserdurchlässigkeit und Selbstheilung von Trenrissen in Beton, Rheinisch-Westfälische Technische Hochschule Aachen, Ph.D. Thesis, Deutschland . Google Scholar
General Administration of Quality Supervision, Inspection and Quarantine of P.R.C. [1999] Method of Testing Cements-Determination of Strength (ISO method) (GB/T1 7671-1999) (Standard Press of China, Beijing), pp. 1–13 . Google Scholar
V. C. Li, Y. M. Lim and Y.-W. Chan, Compos. Eng. Part B 29(6), 819 (1998), DOI: 10.1016/S1359-8368(98)00034-1. Crossref, Web of Science, Google Scholar
W. Stumm and J. J. Morgan , Aquatic Chemistry ( Wiley-Interscience , New York , 1981 ) . Google Scholar
L. P. Tang and G. Joost, Cement Concret. Res. 37(4), 589 (2007). Web of Science, Google Scholar
M. M. Vaidlfa and U. K. Janowski, Smart Mater. Struct. 8, 623 (1999). Web of Science, Google Scholar
Wan, P. F. [2004] Research on self-diagnose and self-repair systems in smart structures by hollow optical fiber, Nanjing University of Aeronantics and Astronautics, Nanjing, pp. 1–12 . Google Scholar
P. F. Wan, D. K. Liang and M. J. Guo, Piezoelectrics Acoustooptics 26(2), 95 (2004). Google Scholar
S. R. Whiteet al., Nature 409(1), 794 (2001), DOI: 10.1038/35057232. Crossref, Web of Science, Google Scholar
F. Xinget al., Self-healing Mechanism of a novel cementitious composite using microcapsules, Int. Conf. Durability of Concrete Structures2 (2008) pp. 195–204. Google Scholar