@inproceedings{c66eae89856a4610a3ba4df0a95b45ff,
title = "Reuse of waste paper sludge as supplementary cementing material",
abstract = "This paper shows the possibility of reutilize paper sludge waste as supplementary cementing material for the cement manufacture. This industrial waste consists essentially of a mixture of organic matter (30%) and inorganic compound, such as calcite and clay minerals. The raw paper sludge does not present pozzolanic properties, but once calcined at 650°C during 2 hours, exhibits high pozzolanic activity, similar to silica fume at 28 days, as a consequence of the transformation of kaolinite into metakaolinite. Calcined paper sludge was used as partial Portland cement replacements of 0, 5, 10 and 20%. Enhancement in compressive strength was appreciably obtained for 10 and 20% substitution levels from 7 days on. Furthermore, calcined paper sludge slightly reduces the initial and final setting times of cement paste.",
keywords = "Cement, Pozzolans, Reuse, Waste paper sludge",
author = "M. Fr{\'i}as and O. Rodr{\'i}guez and {De Rojas}, {M. I.S{\'a}nchez} and B. Nebreda and I. Vegas and J. Urreta and R. Garc{\'i}a and R. Vigil",
year = "2008",
language = "English",
isbn = "9780873397261",
series = "Proceedings of the 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008",
publisher = "Minerals, Metals and Materials Society",
pages = "1499--1506",
booktitle = "Proceedings of the 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008",
address = "United States",
note = "2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008 ; Conference date: 12-10-2008 Through 15-10-2008",
}