TY - CHAP A1 - Schmidt, Wolfram A1 - Leinitz, Sarah A1 - Mota, Berta A1 - Crasselt, Claudia A2 - Liu, Jiaping A2 - Wang, Ziming A2 - Holland, Terence A2 - Huang, Jing A2 - Plank, Johann T1 - Influence of the aqueous phase of cement paste on the rheology in the presence of PCE T2 - Superplasticizers and other chemical admixtures in concrete N2 - The paper presents rheometric results and hydration curves for cementitious systems based on cement mixed with different aqueous phases at solid volume fraction of  = 0.45. The varied aqueous phases were deionized water, limewater, the filter residue of a cement paste mixed at w/c = 2.0, and the filtrate of cement paste at solid volume fraction of 0.45. Each cementitious system provided different amounts and sizes of particles formed in the aqueous phase. The pastes were observed with and without polycarboxylate ether based superplasticizer. It was observed that the presence of particles causes higher PCE saturation dosages to achieve a minimum value, but the minimum value is only affected in the case of large particles. In all cases with and without PCE, the presence of small particles causes increased plastic viscosity. In addition, with decreased number and size of hydrates in the aqueous phase the hydration was retarded, which was specifically pronounced in the presence of PCE PB - American Concrete Institute CY - Farmington Hill, Michigan KW - Aqueous phase of cement paste KW - Polycarboxylate ether KW - Rheology KW - Yield stress KW - Plastic viscosity KW - Heat of hydration KW - Syngenite KW - Solid volume fraction PY - 2018 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/47107 AN - OPUS4-47107 SN - 978-1-64195-029-9 SP - SP-329-34, 428 EP - 443 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany