Skip to main navigation menu Skip to main content Skip to site footer
Journal of Material Science and Technology Research

Articles

Vol. 2 No. 2 (2015)

Effect of MgSO4 Solution on the Physicochemical and Mechanical Properties of OPC-Metakaolin and OPC-Metakaolin-Limestone Blends

DOI
https://doi.org/10.15377/2410-4701.2015.02.02.1
Submitted
September 26, 2015
Published
2021-11-24

Abstract

This study aims to investigate the effect of MgSO4 solution on the durability of the pastes made of ordinary Portland cement (OPC) blended with 10, 20 and 30 wt.% metakaolin (MK) and the pastes made by partial substitution of metakaolin in the mix containing 30% metakaolin by 5 and 10 wt.% limestone (LS). All pastes were prepared using the suitable amount of water for standard consistency. The pastes cured in tab water for 28 days then divided into two sets; the first one continued for hydration in tab water up to two years. The second set was immersed in 5% MgSO4 solution for the same period of hydration. Compressive strength, chemically combined water content and free lime content of the two sets of the hardened cement pastes were determined and compared to each other. Also, mass change of the set samples immersed in sulphate solution was investigated. In addition, phase composition and microstructure of some selected samples in the two solutions were examined by using XRD and SEM techniques respectively. It was found that the paste made of (70% OPC + 20% MK + 10% LS) represent the most durable against sulphate attack.

References

  1. Girardi F, Vaona W and Di Maggio R. Resistance of different types of concretes to cyclic sulfuric acid and sodium sulfate attack. Cem Concr Compos 2010; 32(8): 595-602. http://dx.doi.org/10.1016/j.cemconcomp.2010.07.002
  2. Chang Z-T, Song X-J, Munn R and Marosszeky M. Using limestone aggregates and different cements for enhancing resistance of concrete to sulphuric acid attack. Cem Concr Res 2005; 35(8): 1486-1494. http://dx.doi.org/10.1016/j.cemconres.2005.03.006
  3. Pandey SP, Singh AK, Sharma RL and Tiwari AK. Studies on high-performance blended/multiblended cements and their durability characteristics. Cem Concr Res 2003; 33(9): 1433-1436. http://dx.doi.org/10.1016/S0008-8846(03)00091-7
  4. Irassar EF, Bonavetti VL and Gonzalez M. Microstructural study of sulfate attack on ordinary and limestone portland cements at ambient temperature. Cem Concr Res 2003; 33(1): 31-41. http://dx.doi.org/10.1016/S0008-8846(02)00914-6
  5. Atahan HN and Dikme D. Use of mineral admixtures for enhanced resistance against sulfate attack. Constr Build Mat 2011; 25(8): 3450-3457. http://dx.doi.org/10.1016/j.conbuildmat.2011.03.036
  6. Hekal EE, Kishar E and Mostafa H. Magnesium sulfate attack on hardened blended cement pastes under different circumstances. Cem Concr Res 2002; 32(9): 1421-1427. http://dx.doi.org/10.1016/S0008-8846(02)00801-3
  7. Al-Akhras NM. Durability of metakaolin concrete to sulfate attack. Cem Concr Res 2006; 36(9): 1727-1734. http://dx.doi.org/10.1016/j.cemconres.2006.03.026
  8. Lee ST, Moon HY, Hooton RD and Kim JP. Effect of solution concentrations and replacement levels of metakaolin on the resistance of mortars exposed to magnesium sulfate solutions. Cem Concr Res 2005; 35(7): 1314-1323. http://dx.doi.org/10.1016/j.cemconres.2004.10.035
  9. ASTM Standards. Standard test method for setting of hydraulic cement by vicat needle. ASTM 1983; C191-82: 208-211.
  10. ASTM Standards. Standard test method for compressive strength of hydraulic cement mortars. ASTM Designation 1992; C109-92: 62-64.
  11. Abo-El-Enein SA, Daimon M, Ohsawa S and Kondo R. Hydration of low porosity slag lime pastes. Cem Concr Res 1974; 4(2): 299-312. http://dx.doi.org/10.1016/0008-8846(74)90141-0
  12. Kondo R, Abo-El-Enien SA and Daimon M. Kinetics and mechanisms of hydrothermal reaction of granulated blast furnace slag. Bull Chem Soci Jpn 1975; 48: 222-226. http://dx.doi.org/10.1246/bcsj.48.222
  13. Amin MS, Abo-El-Enein SA, Abdel Rahman A and Alfalous KA. Artificial pozzolanic cement pastes containing burnt clay with and without silica fume: physicochemical, microstructural and thermal characteristics. J therm Anal Calorim 2011; DOI 10.10071s10973-011-1676-5.
  14. Abo-El-Enein SA, Abbas R and Ezzat E. Properties and durability of metakaolin blended cements. Materiales de Construcción 2010; 60(299): 21-35. http://dx.doi.org/10.3989/mc.2010.50509
  15. Singh M and Garg M. Calcium sulfate hemihydrate activated low heat sulfate resistant cement. Constr Build Mat2002; 16(3): 181-186. http://dx.doi.org/10.1016/S0950-0618(01)00026-5
  16. Ghrici M, Kenai S and Meziane E. Mechanical and durability properties of cement mortar with algerian natural pozzolana. J Mater Sci 2006; 41: 6965-6972. http://dx.doi.org/10.1007/s10853-006-0227-0
  17. Bonen D. A microstructural study of the effect produced by magnesium sulfate on plain and silica fume-bearing portland cement mortars. Cem Concr Res 1993; 23(3): 541-553. http://dx.doi.org/10.1016/0008-8846(93)90004-S
  18. Abd El.Aziz M, Abd El.Aleem S, Heikal M and El. Didamony H. Hydration and durability of sulphate-resisting and slag cement blends in Caron's Lake water. Cem Concr Res 2005; 35(8): 1592-1600. http://dx.doi.org/10.1016/j.cemconres.2004.06.038
  19. Lee S-T. Performance deterioration of portland cement matrix due to magnesium sulphate attack. KSCE Journal of Civil Engineering 2007; 11(3): 157-163. http://dx.doi.org/10.1007/BF02823896
  20. Tian B and Cohen MD. Does gypsum formation during sulfate attack on concrete lead to expansion. Cem Concr Res 2000; 30 (1): 117-123. http://dx.doi.org/10.1016/S0008-8846(99)00211-2
  21. Barker A and Cory H. The early hydration of limestonefilled cements. International Conference on Blended Cements in Construction. Sheffield. Elsevier Science Ltd, London, UK 1991; 9-12: 107-124.