The first attempt to classify the structure of a typical capillary-por
ous material (cement stone) with allowance made for specific physicoch
emical features of the solid-liquid-gas phase interactions is describe
d. The development of the porous structure in the 2-1000-nm range duri
ng the hardening of cement and its minerals is analyzed with the use o
f thermoporosimetry. Principal laws describing the formation of the mi
crostructure of new crystalline and amorphous phases are established.