FIELD: construction.
SUBSTANCE: invention relates to production of construction materials and specifically to production of cement. Cement surface modification method involves bipolar charging of cement in the electrification chamber under action of high-voltage electric field of corona discharge. Bipolar charging is performed by passing one half of the aerosol flow through the positive unit of the charging device, and the other half of the flow is through the negative unit of the charging device. Unipolarly charged particles are then fed into an agglomerator with a variable high-voltage electric field.
EFFECT: longer caking period of cement, fewer "free" finely dispersed particles (diameter less than 3 mcm), reduced roughness of surface of "spheroids" and specific surface due to equalization of granulometric composition, as well as retardation of early stages of cement hydration, which increases mobility of concrete mixtures.
1 cl, 3 dwg
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