The article addresses the issues of structure formation of road composite materials containing hydraulic (рortland cement) and organic (bitumen) binders. It has been determined that organic and hydraulic binders, being thermodynamically incompatible, are capable of interaction and complement each other. Structure formation processes are associated with interphase transition layers interaction mechanism and the direct formation of phase contacts with cement crystallohydrates. The interphase boundary is diffuse and is established through interphase transition layers. The emergence of interfacial layers is thermodynamically advantageous, since it contributes to a decrease in Gibbs free energy and does not contradict modern concepts of solid state physics. It was established that with cement content of about 30 % of complex bitumen-cement binder volume, there will appear (nucleate) phase contacts that will prevail in the binder structure when the cement content is more than 60 %. In the case phase contacts prevail, concrete will demonstrate significant strength at high temperatures, but low temperature and fatigue crack resistance, which will lead to their durability loss. The cement content of 30–40 % of the total complex binder can be considered optimal.

The paper has analyzed influence of additives representing a group of thermoplastic elastomers and complex thermoplast-based modifiers on fatigue life of asphalt concrete. Regularities in time have been determined in the paper and close values of their physical and mechanical properties have been obtained while using various types of binders and modifiers. Statistic and laboratory investigations have made it possible to obtain theoretical parameters of the fatigue life for materials used for road dressing. The analysis has been based on statistical values of ordinary and modified asphalt concrete and asphalt concrete mixes of C- and A-type obtained during the experiments for the period from 2010 till 2016. A statistic analysis has permitted to compare a parameter Ипл (resistance index to plastic deformations) with such parameters as ny (number of elastic constraints) and Rc (threshold structural strength). 12 calculations (Nos. 1–12) have been carried out in order to realize targets of the second investigation. Calculative characteristics of asphalt concrete required for determination of reliability parameters have been estimated in the paper. A bottom layer of twoor three-coat pavement has been selected as an object of the investigation due to the fact that it is more often subjected to an impact of cyclic tensile stresses caused by a transport load. The required value for calculation of tensile stresses s at calculated temperature 0 has been accepted on the basis of executed estimations while using finite elements method and distribution of stresses has been determined along structure with 20 cm thickness due to load А2. Corresponding conclusions have been made in accordance with the obtained results.

Белорусский государственный экономический университет, Минск, Беларусь ЭКОЛОГОБЕЗОПАСНЫЕ ТЕХНОЛОГИИ ПРИМЕНЕНИЯ ОТХОДОВ ПРОМЫШЛЕННОСТИ КИТАЯ ПРИ РЕГЕНЕРАЦИИ АСФАЛЬТОБЕТОННЫХ ПОКРЫТИЙ Аннотация. Представлена разработка технологии регенерации отработанных асфальтобетонных покрытий при условии применения отходов промышленности и получения экологически безопасных асфальтобетонных покрытий. Для исследований выбрана технология диспергирования и перемешивания отходов для достижения их однородности и активации смеси с целью повышения физико-химического взаимодействия с вяжущими веществами. Показано, что в материалах на органогидравлических вяжущих тяжелые металлы, содержащиеся в отходах и в асфальтогрануляте, надежно блокируются, их миграция в окружающую среду существенно снижается. При оптимальном содержании битумной эмульсии и цемента наблюдается эффект максимальной структурной прочности дорожностроительного материала и максимальной фиксации ионов тяжелых металлов. Предложенные технические решения обоснованы теоретическими расчетами и позволяют осуществлять экологобезопасную регенерацию асфальтобетонных покрытий. Ключевые слова: отходы промышленности, экологобезопасные технологии, асфальтобетон, тяжелые металлы Для цитирования. Экологобезопасные технологии применения отходов промышленности при регенерации асфальтобетонных покрытий / Б. М. Хрусталев [и др.] // Вес. Нац. акад. навук Беларусi.