Mechanical Properties, Resistance to Fire and Durability for Sulfate Ions of Alkali activated Cement made from Blast furnace Slag- Fine Metakaolin | ||||
| Egyptian Journal of Chemistry | ||||
| Article 15, Volume 63, Issue 12, December 2020, Page 4821-4831 PDF (1.83 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2020.28427.2612 | ||||
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| Authors | ||||
Osama Fadel Sakr1; Eisa El-Sayed Hekal2; Fayza Hashem   3; Faten Rayan Selim2
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| 1Physical Chemistry and Building Materials, Faculty of Science, Ain Shams University | ||||
| 2Physical Chemistry and Building Materials, Faculty of Science, Ain Shams University, Cairo, Egypt | ||||
| 3Abdel shafei Mhmed Ain shams university | ||||
| Abstract | ||||
| The characterization of alkali activated cement prepared by blending blast furnace slag (BFS) and fine metakaolin (FMK) are studied. MK of particle size 45 μm and blain area 6530 cm2/kg is used as 20%, 40%, 60% and 80% replacement of BFS in the production of alkali activated cement. The alkaline activator used was mixture of NaOH and Na2SiO3 with various molar ratios. The prepared specimens are cured under humid conditions up to 90 days. All specimens are characterized regarding setting times, compressive strength and water absorption. The formed hydrates are studied using XRD analysis, FTIR spectroscopy and SEM. The durability of the prepared geopolymer are determined via studying the fire resistance at 300 o, 600 o and 800 oC and sulfate ions attacks after time intervals extended up to 1 year. The results indicate that the specimens made from 60% BFS and 40% FMK and activated by (1:1) NaOH and Na2SiO3 were revealed the best overall behavior. | ||||
| Keywords | ||||
| Geopolymer; Slag; Metakaolin; Thermal resistance; Sulfate resistance | ||||
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