Zobrazeno 1 - 10
of 126
pro vyhledávání: '"André Nonat"'
Publikováno v:
Construction and Building Materials. 188:599-606
The effect of phosphorous on the mineralogy and reactivity of Portland cement has been investigated through an industrial clinkers series. The samples were collected from the same Tunisian cement plant and classified according to the content of P2O5
Publikováno v:
Chemical Geology. 497:64-73
Improving our understanding of the hydration rate of the principal mineral phases of cements is key to better control the mechanical properties of cement paste and of concrete-based products. In the present study, the dissolution kinetics of the prin
Publikováno v:
Cement and Concrete Research. 105:72-80
The present work focuses on the mineralogy and the reactivity of clinkers made from the integration of natural fluorapatite in the raw meals with percentages ranging from 0 up to15%. The samples were characterized by infrared spectrometry, X-ray diff
Autor:
André Nonat, Camille Nalet
Publikováno v:
Cement and Concrete Research. 91:87-96
The hydration of tricalcium silicate (C 3 S) in presence of hexitols ( d -glucitol, d -galactitol and d -mannitol) which only differ by their stereochemistry was followed by using calorimetric and conductometric measurements of the pastes and of the
Autor:
Gilles Plusquellec, André Nonat
Publikováno v:
Cement and Concrete Research. 90:89-96
The interaction between C-S-H and anions, especially chloride, is already well documented. However, the conclusions vary from one author to another and a comparison of the obtained data is not always possible. Thus, this study aims to clarify this ph
Autor:
Camille Nalet, André Nonat
Publikováno v:
Cement and Concrete Research. 89:97-108
The ion complexing power and the adsorption of set-retarders such as sugar derivatives ( d -glucitol, d -gluconate…), amino-carboxylates and phosphonates (EDTA, EDTMP, …) on C-S-H were identified and compared. The complexation equilibria of the p
Autor:
André Nonat, Camille Nalet
Publikováno v:
Cement and Concrete Research. 89:177-186
The effects of hexitols which are stereoisomers ( d -glucitol, d -galactitol and d -mannitol) on the hydration of a tricalcium aluminate-calcium sulfate mixture with calcium hydroxide in paste were assessed and compared. The interactions of the molec
Autor:
André Nonat, Camille Nalet
Publikováno v:
Cement and Concrete Research. 87:97-104
The retardation and the maximum rate of tricalcium silicate (C 3 S) hydration induced by organic molecules were rarely measured as a function of their molar concentration and prevent us to identify the effect of specific functional groups carried by
Autor:
André Nonat, Luc Nicoleau
Publikováno v:
Cement and Concrete Research. 86:1-11
C3S hydration is an interesting example of chemical coupling between C3S dissolution, C–S–H and portlandite precipitation. It occurs because Ca2 +, OH− and silicate ions are present in C3S, in both hydration products and in the surrounding solu
Autor:
Barbara Lothenbach, André Nonat
Publikováno v:
Cement and Concrete Research
© 2015 Elsevier Ltd. This paper presents a review on the relationship between the composition the structure and the solution in which calcium silicate hydrate (C S H) is equilibrated. The silica chain length in C S H increases with the silicon conce