抄録
A mixture of lime and silica was hydrothermally treated in stirred suspentions at 191°C for 8 hours. The lime used for experiments was prepared by calcining limestone at 900, 1000, 1100 and 1200°C for 4 hours. Thus an aqueous slurry consisting of globular secondary particles aggregated with xonotlite was prepared.
When a range of the calcining temperature of the limestone was up to 1200°C, crystal grain of the resulting lime grew up gradually together with raising the calcining temperature, so that the reactivity of the lime with HCl fell down.
These properties of the lime did not affect the crystal growth and the features of the resulting xonotlite, but remarkably affected the form and structure of the resulting globular secondary particles consisting of xonotlite, i. e., the secondary particles became larger and denser together with raising the calcining temperature.
