Today, accidents at capital construction facilities are encountered at various stages of the buildings’ life cycle, which is associated with errors in the design and construction as well as the rules violation for the buildings’ operation. Now there is no unified system of accounting and technical analysis of the causes in the current situation, therefore, it is necessary to pay attention to monitoring and methods of construction sites accidents causes’ complex diagnosis. The scientific research is devoted to the methodological foundations’ development for a comprehensive analysis of the accidents on the construction sites and the development of organizational and technological measures to reduce the probabilityof their occurrence. The main objective of the scientific article is to consider the causes of the accident at various stages of the building’s life cycle. The article discusses the building life cycle stages and the causes of accidents from the pre-design stage to the capital construction object’s demolition. The buildings and structures’ collapse statistics and their causes are analyzed. An algorithm for analyzing the accidents causes throughout their operation life is proposed. The importance of the capital construction facilities accidents’ monitoring and analysis stage, the improving methods for their diagnosis and warning to prevent the emergency situations recurrence is proved. A set of organizational and technological measures for the capital construction objects accidents’ prevention throughout their operation life is proposed.

Woodworking industry currently generates a large amount of unused waste suitable for recycling. The solution to this urgent problem is the use of this raw material in construction industry, which would solve many economic and environmental problems. The article describes the main technologies for the construction of residential houses from wood concrete blocks and the features of the construction and operation of such buildings. Methods of comparative analysis of the structure of wood concrete and brick housing construction and the possibility of ecological materials’ effective use in the conditions of the Rostov region on the basis of thermal engineering calculation are also presented. Having analyzed the main characteristics and properties of ecological building material, the main advantages and disadvantages of wood concrete in the construction and further operation of residential buildings are considered.

No abstract

In this work, a study of the integral strength and deformation characteristics of centrifuged and vibrocentrifuged concretes on activated Portland cement is carried out. Mechanical activation of cement was carried out using a specialized grinding unit. The manufacture of centrifuged and vibrocentrifuged samples was carried out on an experimental laboratory centrifuge. All samples were made from concrete of the same composition. In total, four basic samples of annular cross-section were manufactured and tested with the following dimensions: outer diameter D = 450 mm; inner hole diameter d = 150 mm; total height H = 1200 mm. The optimal values ​​of technological parameters of centrifugation and vibrocentrifugation are given. A scheme has been developed for obtaining small-sized samples from a common annular section to determine the strength and deformation characteristics. According to the results of the study, it was found that an improvement in the values ​​of integral strength and deformation characteristics when using activated Portland cement is observed in both centrifuged and vibrocentrifuged samples. It was found that samples made by vibrocentrifugation technology have the best strength and deformation characteristics than samples made by centrifugation. The conclusion is made about the technology of vibrocentrifugation as the most preferable for the manufacture of reinforced concrete products of annular section.