RT Journal Article
T1 Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water
A1 Goñi, S.
A1 Frías, M.
A1 De La Villa, R. Vigil
A1 Vegas, I.
AB Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.
SN 0958-9465
YR 2013
FD 2013-07
LK https://hdl.handle.net/11556/4563
UL https://hdl.handle.net/11556/4563
LA eng
NO Goñi , S , Frías , M , De La Villa , R V & Vegas , I 2013 , ' Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water ' , Cement and Concrete Composites , vol. 40 , pp. 1-6 . https://doi.org/10.1016/j.cemconcomp.2013.04.002
NO This work has been supported by the Minister of Science and Innovation MAT2009-10874-CO3 and Spanish National Research Council (CSIC) (Ref no. 200460E617). The authors gratefully acknowledge to the Holmen Paper Madrid Company and Spanish Cement Institute (IECA) for their help in this project. The authors also thank to Maria Teresa Vázquez Segovia for her help in the experiments carried out.
DS TECNALIA Publications
RD 26 jul 2024