EFFECT OF GROUND GRANULATED BLAST SLAG (GGBS) TO THE BONDING STRENGTH OF GEOPOLYMER MORTAR AS REPAIRING MATERIAL
The bonding strength of geopolymer mortar is very important for binding the old concrete with the latest concrete when act as repair material. The present study is aim to determine the best ratio between GGBS and fly ash in order to find the optimum bond strength under ambient temperature. There are five different ratios of GGBS to fly ash that had been tested in this research which are GGBS: FA= 10:90, 20:80, 30:70, 40:60, and 50:50. The different mixture of GGBS and fly ash is added with the alkaline solution (12M of sodium hydroxide and sodium silicate) and sand which have been mixed then rapped cured under ambient temperature. Once the mixing is done completely, pour the mixture into the metal mold and attach with the OPC concrete substrate. The bonding strength of this research were tested by using slant shear test in 7 days, 28 days and 60 days of curing. From the result tested, GGBS: FA= 30:70 could concluded as the best ratio for presenting the optimum bonding strength in this research since the bond strength for GGBS: FA=30:70 had obtain optimum strength under long curing time (9 MPa in 28 days cured and 10.6 MPa in 60 days cured). The maximum compressive strength of 46.4 MPa was observed at geopolymer mortar with GGBS: FA = 30:70. There are many factors affecting the bond strength of geopolymer which are slow setting time of fly ash and GGBS, curing temperature, size of GGBS and also the mixture proportion. The present study had concluded that GGBS: FA= 30:70 in geopolymer mortar are the best for presenting the bond strength.
 A. Ali, J. Thomas and N.B. Parappattu, “Geopolymer as repair material –a review”, International Journal of Innovative Research in Advanced Engineering, vol. 3, no. 9, pp. 20-25, 2016.
 R. Saldanha, E. Julio, D. Costa and P. Santos, “Modified slant shear test to enforce adhensive failure”, in Conference: Structural Faults and Repair, Scotland, 2012, pp. 1-12.
 D. Suresh and K. Nagaraju, “Ground granulated blast slag (GGBS) in concrete – a review”, IOSR Journal of Mechanical and Civil Engineering, vol. 12, no. 4, pp. 76-82, 2015.
 K. Prasanna, B. Lakshiminarayanan, K. Arun and K. Dinesh, “Flyash based geopolymer concrete with GGBS”, in International Conference on Current Research in Engineering Science and Technology, India, 2016, pp. 12-18.
 P. Abhilash, C. Sashidhar and I. Reddy, “Strength properties of fly ash and GGBS based geopolymer concrete”, International Journal of ChemTech Research, vol. 9, no. 3, pp. 350-356, 2016.
 CEP. (2018). Civil engineering portal [Online]. Available: https://www.engineeringcivil.com/
 A. Ayachit, P. Nikam, S. Pise, A. Shah and V. Pawar, “Mix design of fly ash based geopolymer concrete”, International Journal of Scientific and Research Publication, vol. 6, no. 2, pp. 381-385, 2014.
 Products and systems for the Protection and Repair of Concrete Structures. Test Methods. Determination of Slant Shear Strength, BS EN 12615:1999, British Standards Institution, London, 1999.
 A.W. Wazien, A.R. Razak, M. Abdullah, M. Rozainy, M.M. Tahir, M.M. Faris and H. Hamzah, “Review on potential of geopolymer for concrete repair and rehabilitation”, MATEC, vol. 78, pp. 01065(1)-01065(6), 2016.
 L. Krishnan, S. Karthikeyan, S. Nathiya and K. Suganya, “Geopolymer concrete an eco-friendly construction material”, International Journal of Research in Engineering and Technology, vol. 3, no. 11, pp. 164-167, 2014.
 V.P. Nagendra, “Particle size effect of ground granulated blast furnace slag (GGBS) in cement concrete”, International Journal of Recent Trends in Engineering and Research, vol. 2, no. 8, pp. 6-10, 2016.
 A. Wardhono, D.W. Law and A. Strano, “The strength of alkali-activated slag/fly ash mortar blends at ambient temperature”, Procedia Engineering, vol. 125, pp. 650-656, 2015.
 J. Temuujin, A.V. Riessen and K.J.D. MacKenzie, “Preparation and characterization of fly ash based geopolymer mortars”, Construction and Building Materials, vol. 24, no. 10, pp. 1906-1910, 2010.
 B.A. Tayeh, B.H. Abu Bakar, M.A. Megat Johari, and S.M. Tayeh, “Compressive Stress-Strain Behavior of Composite”, Iranica Journal of Energy & Environment, vol. 4, no. 3, pp. 294-298, 2013.
Authors who publish with this journal agree to the following terms:
- Authors transfer copyright to the publisher as part of a journal publishing agreement with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after the manuscript is accepted, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).