RT Journal Article
T1 The pozzolanic properties of paper sludge waste
A1 García, R.
A1 Vigil de la Villa, R.
A1 Vegas, I.
A1 Frías, M.
A1 Sánchez de Rojas, M. I.
AB The use of paper de-inking sludge in pozzolanic material manufacture permits a disposable residue to be included in the cycle of the materials. A study on the reuse of paper de-inking sludge, undertaken in Spain, shows its potential as raw material for yielding a product with pozzolanic activity. This study establishes that an optimal condition for transforming paper de-inking sludge into a pozzolanic addition is achieved at 700 °C maintained for 2 h. Under these conditions, the organic matter disappears and the calcined sludge becomes active by transforming kaolinite into metakaolinite. The calcined product exhibits high pozzolanic activity. The present paper also analyses mechanical, physical and chemical properties of a blended cement containing 90% (in mass) standard Portland cement (CEM I-52,5N) and 10% of the pozzolanic addition obtained from controlled calcination of paper de-inking sludge (for 2 h at 700 °C). When the blended cement is compared with a cement containing 100% standard Portland cement, the following conclusions can be mentioned: a significant gain in compressive strength from 7 days on, a sooner initial setting time, as well as a reduction in SO3 percentage. In any case, the new blended cement complies with requirements set out in Spanish/European standard UNE EN 197-1-Part 1.
SN 0950-0618
YR 2008
FD 2008-07
LK https://hdl.handle.net/11556/4063
UL https://hdl.handle.net/11556/4063
LA eng
NO García , R , Vigil de la Villa , R , Vegas , I , Frías , M & Sánchez de Rojas , M I 2008 , ' The pozzolanic properties of paper sludge waste ' , Construction and Building Materials , vol. 22 , no. 7 , pp. 1484-1490 . https://doi.org/10.1016/j.conbuildmat.2007.03.033
NO This research has been supported by the Spanish Ministry of Science and Technology (Project Ref. MAT2003-06479-C03-01/02) and by the Regional Government of Madrid (Project Ref. GR/AMB/0448/2004). The authors wish to thank Holmen Paper–Papelera Penínsular and the Lafarge STDI Laboratory (Toledo, Spain) for their assistance in this research.
DS TECNALIA Publications
RD 26 jul 2024