The phenomena of the formation of local defects and cracks in asphalt concrete pavements of roads and bridges are most often observed in climatic zones with large temperature differences during their seasonal and daily changes. To a large extent, this is due to the heterogeneity of the thermomechanical properties of the materials of the coating layers and the base. To prevent these phenomena, reinforcing rods and meshes are introduced into the coating structure. In this work, using the theory of thermoelasticity, it is shown by the method of mathematical modelling that in cases of incompatibility of the thermomechanical characteristics of asphalt concrete materials and reinforcement, additional localized thermal stresses arise in its small vicinity, which, even at moderate temperatures, can reach critical values and lead to local defects and cracks. Since these defects are latent, they cannot always be detected in practice. The presented results of analytic calculation validated these conclusions. They can be used in both road building and composite design.
In public are considered the functioning features of mechanism of financing of housing construction through the Construction Financing Fund (CFF), the main investor risks of using CFF and pre-conditions of their origins are defined. It is educed that decision-making about investing using CFF must consist of two stages: on the first stage a bailiff chooses an investment project, initiator and proprietor the Builder, on the second stage the choice of object of investing is made by investor. The principles of choice and the model of choosing the Builder by bailiff are developed; the principles, model and methods of Investor's choice of investment object are offered. The control system was developed to monitor the pre- conditions of risk origins. The suggestions of legislative base improvements in relation to CFF are developed to decrease the risks of investors.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.