Abstract
This paper describes the research on micro-silica, popular in Kazakhstan ferrosilicon production technogenic waste, its impact on self-compacting concrete rheological and physical-engineering properties, and performance and durability improvement of building structures made of this concrete type utilizing volumetric fiber reinforcement.The paper includes the results of laboratory and industrial tests of self-compacting concrete mixtures (SCC) strength and operational properties.The most effective ratio of micro-silica as a filler in the binder and the optimal amount of low-modulus polypropylene fiber was selected to manufacture high-quality selfcompacting concrete of C25/30, C30/35, C35/40, C40/45 classes produced using local raw materials.Examples of compositions using micro-silica confirm the possibility of up to 20% cement consumption reduction and increase the concrete frost resistance to F340, reduction of self-compacting concrete volumetric water absorption by up to 30%, increase bending strength by up to 35% with the combined use of silica and polypropylene fiber in a right proportion are described here.The research results provide practical value for self-compacting and cast concrete Kazakhstani manufacturers.