CONCRETE

[:ru]Барабанщиков Ю. Г.[:en]Barabanshchikov, U. G.[:] [:ru]д-р техн. наук, доцент, Санкт-Петербургский государственный политехнический университет[:en]Dr. Eng. Sc., Ass. Prof., St. Petersburg State Polytechnical University[:]

[:ru]Соколов В. А.[:en]Sokolov, V. A.[:] [:ru]канд. техн. наук, проф., Санкт-Петербургский государственный политехнический университет[:en]PhD, Prof., St. Petersburg State Polytechnical University[:]

Васильев А. С. Канд. техн. наук, директор научно-технической службы ООО «Эм-Си Баухеми»

[:ru]Шевелев М. В.[:en]Shevelev, M. V.[:] [:ru]инженер, ООО «Эм-Си Баухеми Раша», Санкт-Петербург, Россия[:en]engineer, MC Bauchemie Russia LLC, St. Petersburg, Russia[:]

Alitinform №3 (25) 2012 г. 32-41 p.

Abstract

This research observes the results of hydrating and hardening kinetics for cement compositions with admixtures by testing strength, heat evolution, and plasticity. The following cement retarding admixtures were tested: aqueous solution of polysaccharides and polyphosphates; on the basis of modified technical lignosulfonates, as well as alkali-free accelerating admixtures. The research registered the efficiency of the above-mentioned admixtures and their influence on the characteristics of materials obtained when using Portland cements of various producers.

Key words:

concrete; set-controlling admixtures; setting time; strength; heat evolution