Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
권호 표지
DOI QR코드

DOI QR Code

Classification of Alkali Activated GGBS Mortar According to the Most Suitable Usage at the Construction Site

  • Thamara, Tofeti Lima (Department of Civil and Environmental Engineering System, Hanyang University ERICA Campus) ;
  • Ann, Ki Yong (Department of Civil and Environmental Engineering System, Hanyang University ERICA Campus)
  • Received : 2019.12.17
  • Accepted : 2020.03.17
  • Published : 2020.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

The usage of OPC-free alkali activated ground granulated blast furnace slag(GGBS) mortar has been widely studied on the previous years, due to its advantages on sustainability, durability and workability. This paper brings a new view, aiming to classify the best application in situ for each mortar, according to the type and activator content. By this practical implication, more efficiency is achieved on the construction site and consequently less waste of materials. In order to compare the different activators, the following experiments were performed: analysis of compressive strength at 28 days, setting time measured by needles penetration resistance, analysis of total pore volume performed by MIP and permeability assessment by RCPT test. In general, activated GGBS had acceptable performance in all cases compared to OPC, and remarkable improved durability. Following the experimental results, it was confirmed that each activator and different concentrations impose distinct outcome performance to the mortar which allows the classification. It was observed that the activator Ca(OH)2 is the most versatile among the others, even though it has limited compressive strength, being suitable for laying mortar, coating/plaster, adhesive and grouting mortar. Samples activated with NaOH, in turn, presented in general the most similar results compared to OPC.

Keywords

References

  1. ASTM C1202. (2019). Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration, American Society for Testing and Materials.
  2. Baumert, K.A., Herzog, T., Pershing, J. (2005). Navigating the numbers: Greenhouse gas data and international climate policy, Washington, DC: World Resources Institute, 132.
  3. Brondani, R.P., Rondani, R.P. (2015). Avaliacao do ciclo de vida e do custo de uma edificacao de concreto estrutural com diferentes tracos: estudo do berco ao portao, (Master's Thesis, Federal University ofSanta Maria. Santa Maria, Rio Grande do Sul, 239.
  4. Collins, F., Sanjayan, J.G. (1999). Effects of ultra-fine materials on workability and strength of concrete containing alkali-activated slag as the binder, Cement and Concrete Research, 29(3), 459-462. https://doi.org/10.1016/S0008-8846(98)00237-3
  5. Collins, F., Sanjayan, J.G. (2000). Effect of pore size distribution on drying shrinking of alkali-activated slag concrete, Cement and Concrete Research, 30(9), 1401-1406. https://doi.org/10.1016/S0008-8846(00)00327-6
  6. De Souza, U.E.L. (1998). Perdas de Materiais nos Canteiros de Obra. Qualidade na Construcao, Sao Paulo, 13.
  7. Eguchi, K., Takewaka, K., Yamaguchi, T., Ueda, N. (2013). A study on durability of blast furnace slag cement concrete mixed with metakaolin-based artificial pozzolan in actual marine environment, In Third International Conference on Sustainable Construction Materials and Technologies.
  8. Fernandez-Jimenez, A., Palomo, J.G., Puertas, F. (1999). Alkali-activated slag mortars: mechanical strength behaviour, Cement and Concrete Research, 29(8), 1313-1321. https://doi.org/10.1016/S0008-8846(99)00154-4
  9. Isaia, G.C. (2005). O concreto: da era classica a contemporanea, Concreto: Ensino, Pesquisa e Realizacoes, Sao Paulo, Brasil: IBRACON, Editor: GC Isaia, cap, 1, 1-44.
  10. KS F 2405. (2010). Standard Test Method for Compressive Strength of Concrete, Korea Standards Association.
  11. Mehta, P.K., Monteiro, P.J.M. (2014). Concreto: Microestrutura, Propriedades e Materiais, 2. ed.Sao Paulo: IBRACON, 782.
  12. Siddique, R., Bennacer, R. (2012). Use of iron and steel industry by-product (GGBS) in cement paste and mortar, Resources, Conservation and Recycling, 69, 29-34. https://doi.org/10.1016/j.resconrec.2012.09.002
  13. Suresh, D., Nagaraju, K. (2015) Utilization of GGBS as a partial replacement of cement, Journal of Civil Engineering, 12, 76-82.