Next Article in Journal
Self-Healing of Cracked Textile Reinforced Concrete Layers
Previous Article in Journal
Physical Characterization of Dutch Fine Recycled Concrete Aggregates: A Comparative Study
Abstract

Self-Healing Potential of Geopolymer Concrete

Building Materials, Department of Civil, Environmental and Natural Resources Engineering, 97871 Luleå, Sweden
*
Author to whom correspondence should be addressed.
Presented at the 1st International Conference on Smart Materials for Sustainable Construction—SMASCO 2019, Luleå, Sweden, 10–12 December 2019.
Proceedings 2019, 34(1), 6; https://doi.org/10.3390/proceedings2019034006
Published: 18 November 2019
Waste management is emerging as one of the most troublesome and critical problems of the upcoming decades. Therefore, the utilization of industrial by-products as building materials components has been widely studied in recent years. Geopolymer concrete, with binder entirely substituted by slag or fly ash, is one of the materials, which combines positive environmental impact with satisfying mechanical parameters. Although various properties of geopolymers have been examined, the autogeneous self-healing potential of this alternative binder has not been thoroughly verified yet. This paper aims to validate whether geopolymer concrete made of alkali activated slag is capable of self-repair. Four different mortar mixes with two types of slag and varying activation parameters were investigated. The polyvinyl alcohol (PVA) fibers were added in order to control the crack width. The 1.2 × 1.2 × 6 cm beams were pre-cracked with the use of three point bending test at 7 days after casting to achieve crack opening of approximately 300 µm. The effects of various exposure conditions on the healing process were examined, i.e., lime water, different sodium silicate solutions and water. The self-healing efficiency as well as the evolution of the crack recovery was assessed by the observation of the crack surface with the use of digital optical microscope. The healed area of the crack was calculated and compared for all the specimens by applying the image processing techniques. The morphology of the healing products as well as their chemical composition were examined with the use of Scanning Electron Microscope with Energy Dispersive Spectroscopy.
Keywords: autogeneous self-healing; cementitious materials; alkali activation; cracking autogeneous self-healing; cementitious materials; alkali activation; cracking
MDPI and ACS Style

Rajczakowska, M.; Habermehl-Cwirzen, K.; Hedlund, H.; Cwirzen, A. Self-Healing Potential of Geopolymer Concrete. Proceedings 2019, 34, 6. https://doi.org/10.3390/proceedings2019034006

AMA Style

Rajczakowska M, Habermehl-Cwirzen K, Hedlund H, Cwirzen A. Self-Healing Potential of Geopolymer Concrete. Proceedings. 2019; 34(1):6. https://doi.org/10.3390/proceedings2019034006

Chicago/Turabian Style

Rajczakowska, Magdalena, Karin Habermehl-Cwirzen, Hans Hedlund, and Andrzej Cwirzen. 2019. "Self-Healing Potential of Geopolymer Concrete" Proceedings 34, no. 1: 6. https://doi.org/10.3390/proceedings2019034006

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop