| you are: Structurally-mechanical properties of the cement test
The Cement stone includes:
1) products of hydration of cement:
) gel of hydrosilicate of calcium and other new growths possessing properties kolloidov;
Rather large crystals of Sa (IT) 2, ettringita;
2) not reacted grains klinkera, Купоны на продукцию, sale extreme land.
The Specific surface is resulted on L.E.Kouplendu and J. J. Verbeku;
It is measured on a way of dispersion of X-rays under small corners.
The Term ' new growths ' unites all products of hydration of cement. Which maintenance decreases in process of cement hydration;
3) a time:
) the time of gel concerning by a microtime (less than 1000),
The capillary time which is a macrotime (from 1000 And to 10 microns), located between units of particles of gel; лебедка ТЛ-8Б
Air time and emptiness (from 50 microns to 2 mm) - the cavities filled with air: drained in in the cement dough owing to the vacuum caused by the counteraction; involved in the dough at manufacturing or packing, and also at addition special vozduhovovlekajushchih substances; remained in the father-in-law owing to it nedouplotnenija.
Classification of a time of gel by the sizes is given by Kondo and Dajmonom (the size of a time in the given classification is characterised by half of hydraulic radius):
1) very thin time penetrating particles of gel: mezhkristallitnye - the size less than 6 And, and inside-kristallitnye-6-16A;
2) a time between particles of gel larger - 16-1000 A
All this time is structurally inherent in cement gel, i.e. In gel always there is time as it is the disperse system consisting of particles kolloidnogo of level and their units, divided porovym space.
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