polycarboxylate superplasticizer

The article considers the use of alkaline accelerators of hardening in the construction industry. The influence of alkaline accelerator on the basis of sodium aluminate on the physical and mechanical properties of fine-grained concrete has been investigated. It has been shown that the including of alkali accelerator of hardening Na [Al (OH)4] leads to an increase in water consumption and reducing the strength of the binding agent in the all terms of hardening.

It is shown that one of the innovative ways of obtaining of Rapid-hardening concretes with enhanced performance for fortifications is the use of nanotechnology techniques related to the directed process of structure formation by modifying of nanoscale elements. The problem of improving of the higher-speed impact stability of high-strength concrete by hybrid reinforcement of their structures at the micro level – by energy-active ultrafine mineral additives and macro level – by dispersed fibers is considered.