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For the waterproofing of tunnels and the uniform distribution of space between the lining of tunnels and rock, composite injection solutions are used. To improve the physical and mechanical properties of cement composites, the nanoconstruction effect is used, which is possible when using nanoparticles with extended geometry. Nano-additives and nanomodifiers consisting of nanoparticles, both natural and artificial and technogenic, can be used for the production of cement-containing solutions and concretes. For example, under certain conditions nanocrystalline powder of oxides and hydroxides of aluminum to nanotechnogenic raw materials can be referred to wastes of technogenic origin. The paper investigated the effect of nano-additives-boehmite, which is a waste of production, to increase the strength and frost resistance of plugging materials made on the basis of cement when administered. It is established that the use of boehmite as an additive in cements leads to an increase in the strength properties of concrete and increase its frost resistance, which is a prerequisite for long-term and reliable operation of the composite solution. Thus, the composite solution modified by boehmite is the basis for the creation of plugging solutions

A method is proposed for producing composite solutions using ash as a production waste, as a structuring additive to composite solutions. The chemical and mineral composition of ash is determined. Structuring in composite solutions was studied when cement was replaced by different amounts of ash. It is established that the possibility of a 20% replacement of cement with ash without loss of the technological parameters of the system. The environmental safety of the composite solution using ash modifier has been proved by determining phytotoxicity on seedlings of radish seed Raphanus sativus.

Abstract. The practice of building in difficult geological and hydrogeological conditions found wide use grout mixes used to fill old mine workings or large underground cavities. However, the traditional oil well cementing cementing solutions causes a large flow rate of the solution in the absorbing horizons and its erosion under the influence of the tributaries of the water. A problem arises, which is associated with insufficient provision of guaranteed strength and durability fixed soil or structures, as well as in environmental and health safety used injectable compositions. A promising direction in the construction material science is the approach to the directed structure formation of composites that are initiated by the introduction of nanomodifiers, having ultra-small dimensions in super small quantities. The aim of this work is to develop new cement compositions with improved processing characteristics, based on the comparison of the effect of additives aluminosilicate nanotubes (ANT) and boehmite on the structure formation of cement composites. The main components of the composite solution were: bentonite П2Т 2 А, ANT, bemit, cement and liquid glass.Performed x -ray phase analysis of boehmite and ANT. Studied the structure formation of composite systems. It is established that the highest rate of structure formation is achieved at a concentration of boehmite 0.208% by weight of cement. Relative to the control sample, the rate of structure formation increases 1.3 times. With the introduction of additives ANT the greatest strength of the composite solutions was achieved with the introduction of 0.125% by weight of cement. It was found that cement compositions based on ANT after 28 days of storage the strength of the compositions is increased almost 2 times compared to the composite solution with additives boehmite. It is established that a promising direction for obtaining of composite systems is the modification due to the introduction of environmentally friendly aluminosilicate nanotubes based on natural mineral.

This article proposes a method of obtaining composite solutions using ash from industrial wastes as a structuring additive. Their introduction into the technology of composite solutions not only as modifiers of the structure and properties of composite binders, but also as fine additives, can significantly reduce the cement consumption and prevent waste placement, as well as, improve the performance properties of the latter and obtain new promising types of materials. During this study, the chemical and mineral composition of the ash was determined and the hazard class was calculated. Structure formation in composite solutions was studied when cement was replaced with different amounts of ash. The possibility of replacing 10% of cement with ash without loss of the technological parameters of the system has been established.