Dovgan P. Dispersed-reinforced decorative concretes for architectural elements

The object of research – dispersed-reinforced decorative concrete for the manufacture of architectural elements; the purpose of the study – improving the physical-mechanical and operational properties of architectural elements by using decorative fine-grained concretes, specifically modified by dispersed hybrid reinforcement, polycarboxylate and zeolite additives with rational granulometry and color gamut of fine aggregates; research methods – optimal planning of multifactorial experiment; experimental determination of technological characteristics of mixtures and decorative and operational indices of concrete; nonlinear experimental-statistical (ЕS) models and elements of the сomposition-process fields methodology, particularly, computational experiments with integrated use of ES-models and Monte Carlo method (for a random scanning of prescription fields in determining rational compositions of the composite); results – a possibility of obtaining the high-quality decorative concretes with the use of local quartz non-fractional sands by modifying the cement-sand system with high-dispersed organomineral additives and using certain technological processes while producing is theoretically justified and experimentally proved; novelty – it was established the regularities of individual and general influence of fine zeolite and discrete hybrid glass fibres on technological, physical-mechanical and operational properties of decorative fine-grained concretes, made of quartz sands of natural granulometry; based on full-scale and computational experiments, it was found the use of zeolite instead of a part of binder, glass fibres and aggregates of optimal granulometry in complex with superplasticizer contributes to the reduction of integral porosity, also ensures, in the operation of the composite, a preservation of its strength, and accordingly, resilience to climate impacts while maintaining the decorative qualities; the rational compositions of modified and dispersed-reinforced fine-grained composites, intended for the manufacture of architectural elements of a wide nomenclature, were defined with the use of сomputational materials science methods; introduced – in the educational OSACEA process in the preparation of bachelors and masters by the educational program «The technology of building structures, products and materials», as well as in the design practice of LLC «Hi-Raise Constructions Holding».