TY - JOUR A1 - Gluth, Gregor A1 - Lehmann, Christian A1 - Rübner, Katrin A1 - Kühne, Hans-Carsten T1 - Geopolymerization of a silica residue from waste treatment of chlorosilane production JF - Materials and structures N2 - A silica residue from waste treatment of chlorosilane production was used together with solid sodium aluminate to test its applicability for the production of one-part geopolymers. The blend was activated with water and cured at 70 °C. The degree of reaction and strength were determined after 1, 3, and 7 days. The reaction products were analyzed by XRD and SEM/EDX. Until the third day of curing the degree of reaction of the residue reached 51 % and the strength was 8.9 MPa. The reaction product was identified as geopolymer containing zeolite A. Thus, the results confirmed that the residue may be used in the production of geopolymers. However, after 3 days of curing no further progress of reaction was observed and the strength slightly decreased, which was attributed to changes in the structure of the geopolymeric gel. It was further observed that even harsh vacuum drying left some water (presumably zeolitic water and surface hydroxyl groups) in the geopolymer. KW - Geopolymers KW - One-part formulation KW - Silica KW - Zeolite A PY - 2013 UR - http://link.springer.com/article/10.1617/s11527-012-9972-5/fulltext.html DO - https://doi.org/10.1617/s11527-012-9972-5 SN - 1359-5997 SN - 1871-6873 VL - 46 IS - 8 SP - 1291 EP - 1298 PB - Springer CY - Dordrecht AN - OPUS4-28596 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -