Assessment of Anhydrous Ethanol Extraction to Determine the Ionic Concentration of Hardened Cement Pastes

Abstract:

A new method involving the extraction of various ions from hardened cement pastes by anhydrous ethanol is presented to determine the pH value and ionic concentration during the first 28 days. The volume content of pore solution extracted by ethanol in the leachate reached 12% or above and the pH values calculated by alkali ions are more than 12, even up to 12.73. The results were compared with those from parallel, conventional pore water expression experiments. All of these comparisons verified the feasibility of the proposed method. However, the application of this method to pore solution analysis needs further improvement.

• Periodical: Advanced Materials Research (Volume 177)
• Pages: 506-509
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.177.506
• Online since: December 2010
• Authors: Man Jian Wu, Wu Yao, Wei Wang, Yong Qi Wei
• Keywords: Cement Paste, Ethanol, Leaching, Pore Solution

References

[1] L.J. Buckly, M.A. Carter, M.A. Wilson and J.D. Scantlebury: Cem. Concr. Res. Vol. 37 (2007), p.1544.

[2] H.F.W. Taylor: Cement Chemistry, 2nd Edition (Thomas Telford Publishing, New York, USA, 1997).

[3] V. Rasanen and V. Penttala: Cem. Concr. Res. Vol. 34 (2004), p.813.

[4] C. Arya and J.B. Newman: Mater. Struct. Vol. 23 (1990), p.319.

[5] L.F. Li, J. Nam and W. H. Hartt: Cem. Concr. Res. Vol. 35 (2005), p.277.

[6] E.W. Hansen and H.C. Gran: Magn. Reson. Imaging. Vol. 14 (1996), p.903.

[7] E.W. Hansen and H.C. Gran: Cem. Concr. Res. Vol. 32 (2002), p.795.

[8] R. S. Barneyback and S. Diamond: Cem. Concr. Res. Vol. 11 (1981), p.279.

[9] B.J. Li: The Handbooks for Experimentalist in the Chemistry and Chemical Area (Dalian University of Technology press, Dalian, China, 1996).