Browse > Article
http://dx.doi.org/10.11112/jksmi.2021.25.1.85

Properties of Epoxy-Modified Mortars with Alkali Activators and Ground Granulated Blast Furnace Slag  

Kim, Wan-Ki (Department of Architectural Engineering, Hyupsung University)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.25, no.1, 2021 , pp. 85-92 More about this Journal
Abstract
The purpose of this study is to investigate the properties of hardener-free epoxy-modified mortars(EMMs) using ground granulated blast furnace slag(GGBFS) and alkali activators. The hardener-free EMMs with a GGBFS content of 20% using 4 types of alkali activators were prepared with various polymer-binder ratios, and tested for strengths, water absorption, carbonation depth, chloride ion and H2SO4 penetration depth. The conclusions obtained from the test results are summarized as follows: The compressive strength of the EMMs with a GGBFS content of 20% attains a maximum at a polymer-binder ratio of 10%. The flexural strength of the hardener-free EMMs using Ca(OH)2 as a alkali activator is improved with increasing polymer-binder ratios. However, the flexural strength of the EMMs using NaCO3, Na2SO4 and Li2CO3 is gradually decreased with increasing polymer-binder ratios. Regardless of the type of alkali activator, the water absorption, chloride ion penetration and carbonation depth are remarkably decreased with increasing polymer-binder ratios due to the epoxy film formed in the EMMs. The H2SO4 penetration depth of the hardener-free EMMs with a GGBFS content of 20% is gradually increased with increasing polymer-binder ratio. In this study, the properties of hardener-free EMMs using Ca(OH)2 as a alkali activator are more excellent than those of other alkali activators.
Keywords
Ground granulated blast furnace slag; Alkali activator; Epoxy-modified mortar(EMM); Strengths; Degree of hardening; Water absorption; Carbonation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Ohama, Y.(1973), Study on properties and mix proportioning of polymer-modified mortars for buildings(in Japanese), Report of the Building Research Institute, 65, 102-104.
2 Kim, W. K., and Hong, S. H.(2012), Corrosion-inhibition and durability of polymer-modified mortars using redispersible polymer powder with nitrite-type hydrocalumite, Journal of the Korea Institute of Building Construction, 12(3), 275-282.   DOI
3 Donnelly, J. H.(1965), Inorganic cement-epoxy resin composition containing animal glue, U.S. Patent, 3, 198, 758.
4 Ohama, Y., Demura, K., and Endo, T.(1993), Properties of polymer-modified mortars using epoxy resin without hardener, Polymer-Modified Hydraulic-Cement Mixtures, STP 1176, American Society for Testing and Materials, Philadelphia, 90-103.
5 Lee, J.H, and Kim, W. K.(2012), Long-term strength improvement of epoxy-modified mortars with steam curing, Proceedings of the Korea Institute of Building Construction, 12(1), 263-264.
6 Jo, Y. K, Ohama, Y., and Demura, K.(1994), Strengths, adhesion and chemical resistance of epoxy-modified mortars without hardener, Proceedings of the First East Asia Symposium on Polymers in Concrete, Kangwon National University, Korea, 81-90.
7 Kim, W. K., and Jo, Y. K.(2013), Investigation of optimal curing condition of PMM using epoxy resin precast products, Journal of the Architectural Institute of Korea, AIK, 29(3), 73-80.
8 Ju, M. K., Ohama, Y., and Demura, K.(2001), Strength properties of combined wet/dry-cured SBR-modified concretes using ground granulated blast-furnace slag, Concrete Research and Technology, 12(1), 55-61.   DOI
9 Huang, H., Ye, G., and Damidot, D.(2014), Effect of blast furnace slag on self-healing of microcracks in cementitious materials, Cement and Concrete Research, 60, 68-82.   DOI
10 Lee, S. H., Kim, H. J., Lim, Y. J., Kim, D. H., and Park, B. S.(2019), Effect of Na2SO4 on autogenous healing in initial cracking of blast furnace slag cement paste, Journal of the Korea Concrete Institute, 31(3), 261-267.   DOI
11 Jo, Y. K., and Kim, W. K., Investigation of physical properties and self healing of hardener-free epoxy-modified mortars with GGBFS, Journal of the Korea Institute for Structural Maintenance and Inspection, 24(1), 80-87.   DOI
12 Ahn, T. H., and Kishi, T.(2010), Effect of various carbonates on the crack self-healing behavior of cementitious materials, The 64th Annual Meeting of JCA, pp.156-157.
13 Coppola, L., Coffetti, D., Crotti, E., Dell'Aversano, R., Gazzaniga, G., and Pastore, T.(2020), Influence of lithium carbonate and sodium carbonate on physical and elastic properties and on carbonation resistance of calcium sulphoaluminate-based mortars, Applied Sciences, 10(1), 176.   DOI