Complex study of modified binder properties

Abstract

-Multifunctional studies have already proved the efficacy of nanotechnological solutions to be applied in the civil engineering. This is largely due to the tendency in the product quality increase in terms of the basic exploitation characteristics, as well as, the formation of end-products unique properties. The goal of this study is to examine the modification process occurring in portland cement impacted by a nanostructured binder of silicate composition and to identify the optimal amount of a modifying supplement aimed at improving the physico-mechanical properties of the binder and its further application as the main component in cellular-cement composites production. The paper introduces the results of the experimental studies:rheotechnological, physico-mechanical properties of modified binder compositions, kinetics of durability set, and sample drying. The change of rheotechnological and physico-mechanical properties of the system, when the composition is modified, was justified. However, taking into account the necessary characteristics, the modified binder can be used to gain multi-purposed construction composites such as dense (fine-grained concrete for piece wall products) and cellular (different brands of foam concrete). Due to the collected data, the optimal composition with high durability indexes was chosen.

Multicomponent Binders with Organic Mineral Additive Based on Volcanic Ash

“…Due to high specific surface, finely dispersed active mineral additives have a positive effect on the physicochemical parameters in the contact zone of phase separation. With the formation of a condensation-crystallization structure, the active centers are formed in the zone of contact of cement with fillers, contributing to the accelerated nucleation of new growth crystals, an increase in their number, a certain orientation of the new phase relative to filler particles, which causes an increase in the adhesion of a filler to a binder [1,2,[8][9][10].…”

“…Numerous studies [1][2][3] have proved that mineral components of binders have a positive effect on the process of structure formation of cement stone. Moreover they control the beginning and end of setting, regulate the kinetics of strength and setting, shrinkage, corrosion resistance, durability and operational reliability of concrete.…”

“…In addition, it should be admitted that the use of multicomponent binders in modern monolithic and precastmonolithic construction is not only desirable, but also a necessary condition and standard for obtaining high-quality and high-tech concrete and reinforced concrete products [2,3].…”

Peculiarities of Structure Formation in System "Cement - Basaltic Fibre"

“…Thus, the concrete matrix has lower bending tensile strength and is apt to microcracks formation. Modern research is aimed at improving physical-mechanic characteristics of materials by introducing mineral modifiers and additives of different composition and nature [1][2][3][4][5][6][7][8][9]. However, hardening the base cement matrix by additives does not allow increasing composite bending strength.…”