No abstract

Asphalt concrete is the most common material for highway and motorway construction. The quality of asphalt is determined, to a large extent, by properties of asphalt binder. Fillers, which are mineral powders from carbonate rocks and aggregates fines, such as limestone and dolomite, are often used in the composition of bitumen mastics affecting the performance of asphalt.This article explores the feasibility of using the fines of aluminosilicate sedimentary rocks as fillers. These materials are composed of clay minerals, which change their properties upon the contact with water. Normally, the use of such fillers is restricted because of poor water resistance and swelling of asphalt concrete. In order to improve the performance of these fillers, the thermal modification at moderate temperatures of 500–600 °C has been proposed. Such treatment provides sufficient structural stability of obtained materials and results in the reduction of water absorption of asphalt, improved water resistance (up to 2.5 times) and also, in reduced swelling (up to 9 times).It has been demonstrated that improvement in the filler performance can be achieved by a heat treatment. Such treatment induces changes in the mineral composition and converts the structure of clay minerals into the frame structure of zeolite, as confirmed by X-ray diffraction and infrared spectroscopy. Due to thermal treatment, there is a change in the acid-base properties of the surface of the filler, which is reflected in the profiles of the main adsorption centers. As a result, due to chemisorption, the modified aluminosilicate fillers are able to interact with bitumen. The application of new filler materials in asphalt concrete enables to enhance the performance.

Abstract. Building and development of tourist cluster is an important area for recreation zones. The out-of-country research has proved clusters to be a stimulator for innovations and productivity. Strengthening the cluster in the region helps to develop its own brand, which is undoubtedly, becomes a key competitive advantage.Keywords: resort; resort cluster; tourism; tourist cluster; resort city; Sochi.Введение. Сегодня при грамотном стратегическом планировании и регулярных инвестициях туристический бизнес может стать экономическим драйвером региона. Однако данный процесс должен иметь поддержку в виде международного сотрудничества, государственных программ и действий крупных компаний, которые напрямую влияют на вектор и темп развития курортных кластеров.В настоящее время в развитых странах популярна система развития регионов, основанная на кластерном теории М.Портера. Согласно теории Майкла Портера, кластер -это группа географически соседствующих взаимосвязанных компаний (поставщики, производители и др.) и связанных с ними организаций (образовательные заведения, органы государственного управления, инфраструктурные компании), действующих в определенной сфере и взаимодополняющих друг друга.Материалы и методы. Теоретико-методологической основой исследования являются методы анализа, сравнения, прогнозирования, аналогии и наблюдения.Обсуждение. Кластер в экономической литературе определяется как индустриальный комплекс, сформированный на базе территориальной концентрации сетей специализированных поставщиков, основных производителей и потребителей, связанных технологической цепочкой, и выступающих альтернативой секторальному подходу.Основной принцип, создающий преимущество кластера: сотрудничать на местном уровне, чтобы конкурировать на глобальном.

Special economic zones of the industrialproduction type are created in accordance with the legislation in order to develop the processing and high-tech industries, so it is possible to consider these structures to be the tools for improving innovative activity, as an integral component of modernization of industrial production. The SEZ "Lotus" created in the Astrakhan region is defined at the Federal level as a main platform for localization the production of the equipment and accessories in shipbuilding industry in the South of Russia and can be used for formation the pool of small innovative enterprises and shipbuilding enterprises allowing accumulating their financial resources for development and commercialization of innovative products and technologies.

The article studies the main characteristics of surface polaritons in composite nanomaterials. The authors consider composite media such as noble metal nanoparticles randomly distributed in a transparent dielectric matrix and build dispersion curves of polaritons in such nanocomposites. The paper shows calculating optical parameters of the surface polariton for several values of the radius of metal nanoparticles and the nanocomposite filling parameter. The authors also present the calculations of the complex refractive index for polaritons in composites with nanoparticles of different metals. In addition, the authors find the dependences of the real and imaginary parts of the complex refractive index of the nanocomposite on the normalized frequency for membranes with different thicknesses and calculate real and imaginary parts of dielectric constant for waves in several metals. Besides, the article provides an overview of important stages in the study of surface electromagnetic waves. It shows that the variation of the structure materials, size and concentration of nanoparticles opens wide possibilities for controlling the optical properties of composite mediums and their practical application. The considered nanocomposites are artificially created media whose material parameters can be controlled. The first method consists in changing the relative volume of the nanoparticles filling of the dielectric matrix. The second method consists in changing the dielectric constant of the nanocomposite matrix. The authors emphasize that the dielectric constant of the nanocomposite in this case acquires resonant properties in contrast to the permeability of the nanoparticles themselves.