Hyperpressed Calcium Sulfate Dihydrate Structure

Abstract

In article the method of formation of structure of disperse systems on a basis of calcium sulfate dihydrate is described. It is based on various concentration of a solution at a surface of particles of the various size. As raw materials it was used calcium sulfate dihydrate − a withdrawal of ceramic manufacture. The picked up structure of particles in the sizes was applied. For acknowledgement of the offered method following researches have been carried out on: solubilities of powders, to deformations of a raw mix, durability of structure. The way of reception of gypsum products allows to simplify technology. Energy expenses decrease. Burning is excluded and the grinding is reduced.

Mechanism of gypsum hardening

“…The greatest deviations are characteristic of mixes which support 50-75 % of shallow "mono granularity". At best values conditions for emergence of waterproof contacts in system [15,16] are created.…”

“…Solid substance in the active centers is condensed spontaneously, without energy expenses [6,8]. Process is defined: grain structure [9,10,11], chemical composition [12], level рН [13][14][15], external conditions − temperature and humidity [16] and other parameters ( Figure 3).…”

Modeling of the high-strength clinker-free binder structure

“…As you know, in physical chemistry distinguish between coagulation and crystallization types of spatial structures [3]. They are formed by particles of matter under the influence of various conditions [4]. If the former are the result of exposure, for example, by simple contact, the latter develops during isothermal distillation, pressing or sintering, as well as during the synthesis of a new finely divided solid phase from supersaturated solutions or melts.…”

“…Each structure is characterized by a certain dispersion and, therefore, the number of contacts per 1 cm2 of area [4]. It was established [3] that the number of contacts for disperse systems will be -10 2 -10 3 .…”

“…The smaller the particle size and denser their packaging, the greater the strength of the structure. This is explained by an increase in the number of contacts per unit volume [3,4,7].…”