Strength of Materials
6
In real
technologies of materials, the stage of agglomeration can be regulated by
the addition of additives of surface-active substances (surfactants), widely used
plasticizers, and superplasticizers (SP) [7–10].
2.5 “Spontaneous structure formation” stage
The evolutionary changes of the hardening system are objectively related to
the third evolutionary transition “agglomeration → spontaneous structure forma-
tion.” At the end of the growth stage and the agglomeration stage,
the state of the
system is far from the equilibrium state, therefore at a certain period inside. Systems
of substance and energy redistribution develop simultaneously, which leads to
spontaneous ordering of the system. The phenomenon of morphological selection
is observed, and a “change in the geometry of the system”
takes place; ordered
aggregates of a certain shape and size are formed instead of less ordered shapes.
Technologically, the management of the spontaneous structure formation stage
can be based on different temperature processing, on the use of various types of
forced
compaction by pressing, on the introduction of additives of microparticles,
etc. (
Table 3).
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