Analysis of Crack Microstructure, Self-Healing Products, and Degree of Self-Healing in Engineered Cementitious Composites
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 6
Abstract
In this paper, self-healed cracks of engineered cementitious composites (ECC) are observed by optical microscope and scanning electron microscopy, and self-healing products of ECC are analyzed by X-ray diffraction technology. Meanwhile, the reasons for property differences between origin ECC and self-healed ECC with different crack structures exposed to freeze–thaw in water and deicing salt, respectively, are discussed. ECC specimens with a water–binder ratio of 0.25 with 50% fly ash are studied. The experimental results show that the white self-healing products and other chemical composites similar to the color of ECC matrix are present on the surface of self-healed cracks. The self-healing materials of ECC include kinds of hydration/carbonation products and some chemical compounds penetrating into ECC matrix from self-healing environments. Additionally, the differences in self-healing products and hydration products of binder, self-healing extent, damaged polyvinyl alcohol fiber, weak interface bonding, and microcracks could obviously influence the value variation of first cracking stress, ultrasonic pulse viscosity, and absorption coefficient of self-healed specimens.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
Support from the Doctoral Foundation of Henan Polytechnic University (B2014-013) of China, financial help of Henan Provincial Open Laboratory for Mineral Materials Key Disciplines (MEM14-19) of China, the Key Scientific Research Project of University in Henan Province (15A430008), and the Fundamental Research Funds for the Universities of Henan Province (NSFRF140109 and NSFRF140601) are gratefully acknowledged.
References
Ahmed, A., Mohamed, L., and Gurkan, Y. (2015). “Effect of self-healing on the different transport properties of cementitious composites.” J. Adv. Concr. Technol., 13(3), 112–123.
ASTM. (2004). “Standard test method for measurement of rate of absorption of water by hydraulic-cement concretes.” ASTM C1585, West Conshohocken, PA.
Huang, X., Ranade, R., and Li, V. (2013). “Feasibility study of developing green ECC using iron ore tailings powder as cement replacement.” J. Mater. Civ. Eng., 923–931.
Li, V. C. (2003). “On engineered cementitious composites (ECC)—A review of the material and its applications.” J. Adv. Concr. Technol., 1(3), 215–230.
Li, V. C., and Leung, Y. (1992). “Theory of steady state and multiple cracking of random discontinuous fiber reinforced brittle matrix composites.” J. Eng. Mech., 2246–2264.
Li, V. C., Wang, S., and Wu, C. (2001). “Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite (PVA-ECC).” ACI Mater. J., 98(6), 483–492.
Li, V. C., Wu, H. C., and Chan, Y. W. (1996). “Effect of plasma treatment of polyethylene fibers on interface and cementitious composite properties.” J. Am. Ceram. Soc., 79(3), 700–704.
Qian, S., Zhou, J., and Rooij, M. (2009). “Self-healing behavior of strain hardening cementitious composites incorporating local waste materials.” Cem. Concr. Compos., 31(9), 613–621.
Qian, S., Zhou, J., and Schlangen, E. (2010). “Influence of curing condition and precracking time on the self-healing behavior of engineered cementitious composites.” Cem. Concr. Compos., 32(9), 686–693.
Sahmaran, M., Ozbay, E., Yucel, H. E., Lachemi, M., and Li, V. C. (2011). “Effect of fly ash and PVA fiber on microstructural damage and residual properties of engineered cementitious composites exposed to high temperatures.” J. Mater. Civ. Eng., 1735–1745.
Şahmaran, M., and Li, V. C. (2007). “De-icing salt scaling resistance of mechanically loaded engineered cementitious composites.” Cem. Concr. Res., 37(7), 1035–1046.
Yang, E., Garcez, E., and Li, V. (2014). “Micromechanics-based optimization of pigmentable strain-hardening cementitious composites.” J. Mater. Civ. Eng., 04014017.
Yang, Y., Lepech, M., Yang, E., and Li, V. C. (2009). “Autogenous healing of engineered cementitious composites under wet-dry cycles.” Cem. Concr. Res., 39(5), 382–390.
Yildirim, G., Sahmaran, M., and Ahmed, H. (2015). “Influence of hydrated lime addition on the self-healing capability of high-volume fly ash incorporated cementitious composites.” J. Mater. Civ. Eng., 04014187.
Yu, K., Dai, J., Lu, Z., and Leung, C. (2014). “Mechanical properties of engineered cementitious composites subjected to elevated temperatures.” J. Mater. Civ. Eng., 04014268.
Zhu, Y., Yang, Y. Z., and Yao, Y. (2012a). “Autogenous self-healing of engineered cementitious composites under freeze–thaw cycles.” Constr. Build. Mater., 34, 522–530.
Zhu, Y., Yang, Y. Z., and Yao, Y. (2012b). “Use of slag to improve mechanical properties of engineered cementitious composites (ECC) with high volumes of fly ash.” Constr. Build. Mater., 36, 1076–1081.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 6 • June 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 10, 2015
Accepted: Nov 11, 2015
Published online: Jan 12, 2016
Published in print: Jun 1, 2016
Discussion open until: Jun 12, 2016
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.