Journal article
Accelerated Laboratory Test Suggests the Importance of Film Integrity of Sealers on the Protection of Concrete from Deicer Scaling
Journal of materials in civil engineering, Vol.28(9), p.4016065
09/01/2016
Handle:
https://hdl.handle.net/2376/120507
Abstract
AbstractThis work reports the laboratory performance of five film-forming sealers that protect concrete from deicer scaling (15 freeze-thaw and wet-dry cycles in diluted NaCl or MgCl2 solution). Regardless of the presence or type of sealer, no apparent scaling occurred on the concretes exposed to 2.54% by weight MgCl2 solution, but there was significant reduction in their splitting tensile strength (up to 55% for the nontreated concrete). The best-performing sealer in mitigating this risk of strength reduction was the methyl methacrylate (MMA) polymer. For the concrete exposed to 3% by weight NaCl solution, the scaling resistance and ability of strength preservation were significantly improved by the presence of a sealer. Regardless of the sealer type, the initial rate of water absorption of surface-treated concretes was greatly reduced by the sealer by at least 68%. The water absorption behavior of the sealer-treated concrete showed a strong correlation with mass loss caused by salt scaling. The concrete samples treated by the epoxy sealer featured the lowest initial gas permeability coefficient and the lowest water absorption rates, attributable to the formation of a highly impermeable and hydrophobic surface layer. The surface scanning electron microscope (SEM) micrographs of sealer-treated concrete reveal the importance of the integrity of hardened sealer film in upholding the concrete’s resistance to the transport of waterborne and gaseous phases and the attack by chloride deicers and freeze-thaw cycles.
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Details
- Title
- Accelerated Laboratory Test Suggests the Importance of Film Integrity of Sealers on the Protection of Concrete from Deicer Scaling
- Creators
- Yudong Dang - Yunnan Institute of Building Research Chief Research Engineer, Yunnan Key Laboratory of Building Structure and New Materials, , Kunming 650223, . E-mailXianming Shi - Washington State Univ. Associate Professor, Dept. of Civil and Environmental Engineering, , Pullman, WA 99164 2910 (corresponding author). E-mailNing Xie - Montana State Univ. Research Associate, Western Transportation Institute, , Bozeman, MT 59717. E-mailEli McVey - Montana State Univ. Student Researcher, Western Transportation Institute, , Bozeman, MT 59717. E-mailAmanda Kessel - Cudd Energy Services Field Services Engineer, , Woodlands, TX 77032. E-mail
- Publication Details
- Journal of materials in civil engineering, Vol.28(9), p.4016065
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- American Society of Civil Engineers
- Identifiers
- 99900612708301842
- Language
- English
- Resource Type
- Journal article