โ Scribed by M. Regourd; J.H. Thomassin; P. Baillif; J.C. Touray
No coin nor oath required. For personal study only.
X-ray photoelectron spectrometry (XPS) was used to determine the variation of the characteristic ratios Ca/Si, Al/Si and Mg/Si of two different slags (one in granulated, the other in pelletized form) during hydration. The results show that the slag surface is modified as soon as it becomes in contact with water or alkaline solution. The hydrated superficial layer is depleted of calcium but contains alkali ions if instead of water, NaOH or KOH solutions are used in mixing.
๐ SIMILAR VOLUMES
Methods for determining the codtent of blast furnace slag (BFS) in blended cements composed of BFS and OPC have been briefly reviewed. A variety of dissolution orocedures were investigated and the results compared critically. Extractions with methanol-salicyclic and/or acetic acid show that these s
This paper focusses on the evolution of the heat of hydration of hardening concrete or cement based materials. Based on isothermal and adiabatic hydration tests a new general hydration model is developed, valid both for portland cement and blast furnace slag cement. This hydration model enables the
The hydration behaviour of a 1:1 mixture (by mass) of 'Secar 71' refractory aluminous cement and ground granulated blast furnace slag has been studied over a range of temperature using conduction calorimetry, x-ray diffraction and thermal analysis techniques. The initial hydration of the cement pro
The objective of this study is the characterization of slags from different sources by their chemical composition, glass content, rate and total heat of hydration and compressive strength development with a vlew to establish a relationship between some of their properties and compressive strength.
Specific surface areas and pore structure studies were carried out on autoclaved slag-lime and slag-quartz-lime pastes. Autoclaving temperatures were 181 and 213ยฐC. Water and nitrogen adsorption isotherms were measured and their results are comparatively discussed. The specific surface areas measure