WorldCat Identities

Winnefeld, Frank

Overview
Works: 21 works in 25 publications in 3 languages and 114 library holdings
Roles: Author, Other, dgs, Editor, Opponent
Classifications: TA434, 660
Publication Timeline
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Most widely held works by Frank Winnefeld
Cementitious materials : composition, properties, application by Miguel A.G Aranda( )

2 editions published in 2017 in English and held by 26 WorldCat member libraries worldwide

Design and application of hybrid alkali activated bindersBinding materials based on calcium sulphatesMagnesia building material (Sorel cement) - from basics to applicationNew CO2-reduced cementitious systemsComposition and properties of ternary binders Part IV: Measurement and propertiesCharacterization of microstructural properties of Portland cements by analytical scanning electron microscopyCorrelating XRD data with technological propertiesNo cement production without refractories
Mauer- und Putzmörtel zur Restaurierung historischer Ziegelbauwerke by Frank Winnefeld( Book )

3 editions published in 1999 in German and held by 19 WorldCat member libraries worldwide

Bauchemie von der Forschung bis zur Praxis Beiträge der 2. Tagung Bauchemie in Siegen ; 5./6. März 1999 in Siegen( Book )

1 edition published in 1999 in German and held by 11 WorldCat member libraries worldwide

Tagung Bauchemie, 11. und 12. Oktober in Dübendorf by Tagung Bauchemie( Book )

2 editions published in 2012 in German and held by 4 WorldCat member libraries worldwide

Outcomes of the RILEM round robin on degree of reaction of slag and fly ash in blended cements by Paweł T Durdziński( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

RILEM TC-238 SCM recommendation on hydration stoppage by solvent exchange for the study of hydrate assemblages by Ruben Snellings( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Evaluation of the consistency of fiber reinforced cementitious composites by Josef P Kaufmann( )

1 edition published in 2005 in English and held by 2 WorldCat member libraries worldwide

Carbonation resistance of mortar produced with alternative cements by Andreas Leemann( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1 by Xuerun Li( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Report of TC 238-SCM: hydration stoppage methods for phase assemblage studies of blended cements--results of a round robin test by Ruben Snellings( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

A simple method for determining the total amount of physically and chemically bound water of different cements by Pietro Lura( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

RILEM TC 247-DTA round robin test: sulfate resistance, alkali-silica reaction and freeze-thaw resistance of alkali-activated concretes by F Winnefeld( )

1 edition published in 2020 in English and held by 2 WorldCat member libraries worldwide

Reaction mechanism of magnesium potassium phosphate cement with high magnesium-to-phosphate ratio( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Abstract: Understanding reaction mechanisms of magnesium potassium phosphate (MKP) cement is of significant importance, as it is closely related to the optimum design of MKP cement-based materials. In this study, reaction mechanisms of MKP cements with a high magnesium-to-phosphate (Mg/PO4) molar ratio of 8 were investigated at two different water-to-solid (w/s) ratios of 0.5 and 5. The experimental findings show that the use of this high Mg/PO4 molar ratio suppresses the formation of potassium-free magnesium phosphate hydrates. K-struvite is mainly formed with probably more phosphate than the theoretical value. Moreover, the w/s ratio plays a crucial role on governing the reaction path of MKP cements. The lower w/s ratio (w/s=0.5) leads to higher potassium concentration and pH value, thus suppressing the formation of intermediate product, Mg2 KH(PO4)2 ·15H2 O, which is formed at the higher w/s=5. However, it causes the formation of minor amount of brucite at 28 d, which coexists with K-struvite in the paste
Effect of temperature on phase assemblage of belite calcium-sulfoaluminate cement( )

1 edition published in 2021 in English and held by 1 WorldCat member library worldwide

15 EFFECT OF TEMPERATURE ON PHASE ASSEMBLAGE OF BELITE CALCIUM-SULFOALUMINATE CEMENT Maruša Mrak1,2, Frank Winnefeld3, Barbara Lothenbach3,4, Sabina Dolenec1 e-mail: [email protected] 1Slovenian National Building and Civil Engineering Institute, Dimičeva ulica 12, Slovenia 2Jožef Stefan International Postgraduate School, Jamova cesta 39, 1000 Ljubljana, Slovenia 3Empa, Laboratory for Concrete and Construction Chemistry, Überlandstrasse 129, 8600 Dübendorf, Switzerland 4Norwegian University of Science and Technology (NTNU), Department of Structural Engineering, Trondheim, Norway Belite-calcium sulfoaluminate cements are alternative cements to ordinary Portland cement, as they require less energy and produce a lower amount of carbon dioxide during their production [1]. Temperature is known to alter the hydration of cement materials, as well as their physico-mechanical properties [2,3]. Aim of the study was to investigate the influence of different curing temperatures on the hydrated phase assemblage of belite calcium-sulfoaluminate cements. For that purpose, cement clinker was synthesized with targeted phase composition to obtain the targeted amounts of belite (C2S), calcium sulfoaluminate (C4A3S) and ferrite (C4AF). To prepare the cement, gypsum was added to ground clinker based on defined calcium sulfate to calcium sulfoaluminate molar ratio. The hydration process was investigated at 5, 20, 40 and 60 °C during different curing periods. The phase assemblage of hydrated cements (i.e. type and amount of phases) was studied by thermogravimetric analysis (TGA), X-ray powder diffraction (XRD) and Rietveld refinement. In addition, microstructure of cement pastes and detailed chemical composition of hydration products was studied by scanning electron microscopy with Energy dispersive X-ray spectroscopy (SEM/EDS). Results of the experimental part were compared to a thermodynamic model established using the geochemical modelling program GEMS and thermodynamic database CEMDATA18. The results showed that curing temperature significantly affects the type and amount of precipitated hydration products. As evidenced by X-ray diffraction and thermogravimetric analysis, during the hydration, the anhydrous clinker phases were consumed and hydration products such as ettringite, monosulfate, strätlingite and siliceous hydrogarnet were formed, in addition to the amorphous phases. Scanning electron microscopy results confirmed those findings and showed that the chemical composition of hydrate phases is also altered by curing temperature. The calculated thermodynamic model showed a good agreement with experimental data
Compréhension des mécanismes d'hydratation des ciments composés incorporant de la poudre de verre ou des cendres de boues d'épuration calcinées by Mehdi Mejdi( )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

With the increasing environmental concerns linked to clinker production, finding alternatives for a more efficient and sustainable construction became a necessity. With this aim in mind, several types of by-products can benefice from a rising interest in the construction field, as a potential cement substitute. These materials deserve to be considered, not only for their advantageous environmental aspects, but also for their potential regarding some concrete degradations. This is the cases of fly ash, silica fume and blast furnace slag that proved a compatibility with cement materials and are nowadays used in standardized context. However, even though extending this list allows responding to a real need while valuing local waste; this alternative does not seem to be fully exploited. On the one hand, an optimal use of novel materials involve an improved understanding of their reaction mechanisms in cementitious matrices. On the other hand, the lack of field data regarding long term performance and sustainability makes their use on an industrial scale difficult. This thesis follows this perceptive and aims to strengthen the knowledge related to the reaction mechanisms of alternative supplementary cementitious materials (SCMs). More specifically, this research investigates the physico-chemical properties of glass powder (GP) and sewage sludge ashes (SSA) and their influence on the macroscopic properties of mortar and concrete. An experimental program is designed to monitor the reactions of these additions and the evolution of the microstructural features constituting the cementitious matrix. To achieve this end, state-of-art approaches, based on an X-Ray diffraction (Rietveld-PONKCS) and Quantitative Energy-Dispersive Spectroscopy (SEM-QEDS), allowed to determine (i) the degree of reaction of amorphous SCMs, (ii) the composition of calcium-silicate-hydrates (C-(A)-S-H), and finally (iii) the phase assemblage of hydrating blended cements. After that, the experimental observations are confronted with thermodynamic modelling results. The proposed methodology can be eventually used to assess the use of other by-products as a cement component. The replacement of cement by GP is shown to refine the microstructure and improve the durability of concrete. This comes from the formation of sodium rich C-S-H with a low Ca/Si ratio compared to Portland cement. In the case of SSA, the aluminium, introduced by the dissolution of its amorphous phase, promotes the formation of monocarboaluminates. For substitution rates up to 20%, the mechanical characteristics of mortars are not significantly affected. Finally, a discussion on the durability of these materials in conditions involving sulphur compounds is initiated is presented
Jahresberichte Steinzerfall-Steinkonservierung : 1994-1996. by F Winnefeld( Book )

1 edition published in 1998 in English and held by 1 WorldCat member library worldwide

 
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Cementitious materials : composition, properties, application
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Alternative Names
Winnefeld, F. 1966-

Languages
English (15)

German (8)

French (1)