In order to develop fire resistant geopolymer materials, it is necessary understand the parameters controlling their thermal behavior such as content of alkali or rare earth cations. This study highlights effect carbonate nature and amount on geopolymers in propose a model behaviour predict shrinkage. For this, various mixtures kaolin calcite and/or dolomite with different percentages were calc...

plasters are produced from a light refractory material, mainly mgo (m.p. 2800ºc), a binder, and a void forming substance for insulating purposes. different oxides from the slag penetrate into these voids and provide low melting-point phases suchasrhodonite (mnsio3) (1290ºc), tephorite (mn2sio4) (1345ºc), merwinite (ca3mgsi2o8) (1575ºc), monticellite (camgsio4) (1490ºc), and enstatite (mgsio3) (...

With the raw materials for ironmaking becoming increasingly complex, more accurate phase equilibrium information on slag is needed to refine blast furnace operation reduce energy cost and CO2 emissions. CaO-SiO2-Al2O3-MgO a basic system of in which CaO MgO mainly come from flux, SiO2 Al2O3 are materials. The effect flux additions can be described by pseudo-ternary CaO-MgO-(Al2O3+SiO2) at fixed ...

Abstract With the raw materials for ironmaking are becoming increasingly complex, more accurate control of blast furnace operation is essential to reduce energy cost and CO 2 emission. CaO–SiO –Al O 3 –MgO a basic system slag in which CaO MgO mainly come from flux, SiO Al materials. Effect material composition on phase equilibrium can be described by pseudo-ternary (CaO + MgO)–SiO at fixed MgO/...

The heat capacity of a natural monticellite (Ca,.,Mg.,,Fe.~Mn.o,Sio.9903.99) measured between 9.6 and 343 K using intermittent-heating, adiabatic calorimetry yields C$298) and S&s of 123.64 f 0.18 and 109.44 +0.16 J mol-’ K-’ respectively. Extrapolation ofthis entropy value to end-member monticellite results in an S$, = 108.1 + 0.2 J. mol-’ K-‘. High-temperature heat-capacity data were measured...

Abstract Growth of reaction rims is mainly controlled by a change in physical parameters such as pressure and temperature, the chemical composition system, and/or presence volatiles. In particular, effect volatiles other than water on reaction-rim growth remains poorly understood. To accurately model metamorphic metasomatic processes, quantification dynamics necessary but hitherto missing. this...

Plasters are produced from a light refractory material, mainly MgO (M.P. 2800ºC), a binder, and a void forming substance for insulating purposes. Different oxides from the slag penetrate into these voi...