The effect of curing temperature of high alumina cement on the crystallization of stratlingite: In the case of curing temperatures of 10 °C and 60 °C

Abstract

Stratlingite is one of the constituent minerals of the bonding matrix of low-cement castables. In this study, the crystallization processes of stratlingite in hydrates of high alumina cement at 60°C and 10°C were analyzed using X-ray diffraction (XRD) and electron probe microanalyzer (EPMA). The stratlingite has crystallized in large quantities in the samples cured at 60°C, while in the samples cured at 10°C, stratlingite was not detected beyond the period of fifteen months.

The Effect of Fine-Ground Glass on the Hydration Process and Properties of Alumina-Cement-Based Composites

“…These density changes are considered inevitable and irreversible but necessary to achieve alumina cement’s desired properties [ 6 , 7 ]. The following conditions must be met to avoid the adverse effects of incorrect conversion: temperature must be kept above 38 °C [ 8 , 9 , 10 , 11 ], an adequate water/cement ratio must be provided [ 2 , 9 ], and cement paste alkalinity needs to be maintained at the appropriate level. In addition, conversion needs to occur as the cement paste is hardening, not later [ 6 , 12 , 13 , 14 ]…”

“…In many articles, researchers have considered the possibility of reducing the conversion of cement hydration products by using mineral additives such as blast furnace slag, fly ash, silica fume, metakaolin and zeolite [ 11 , 12 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Replacing part of alumina cement with these mineral additives reduces the heat of hydration and causes a reduction in strength.…”