ЭКСПЕРИМЕНТАЛЬНО-ТЕОРЕТИЧЕСКОЕ ОБОСНОВАНИЕ МЕТОДА ОЦЕНКИ ТРЕЩИНОСТОЙКОСТИ И РАССТОЯНИЯ МЕЖДУ УСАДОЧНЫМИ ШВАМИ БЕТОННЫХ ОБЛИЦОВОК ВОДОХОЗЯЙСТВЕННЫХ КАНАЛОВ

Abstract

Assessment of the susceptibility of concrete to cracking with subsequent changes in the volume and nature of pores, as well as capillary passages, deformation and strength properties of the material (especially tensile deformations and tensile strength) are the main indicators by which the resistance and durability of linings of water channels can be predicted. By regulating technological factors, it is possible to signifi cantly reduce the intensity of moisture shrinkage, which in turn makes it possible to achieve an increase in the operational reliability and durability of concrete linings. The main reason for the manifestation of shrinkage cracks in concrete is the excess, at a certain point in time, of non-manifested shrinkage deformations, as a result of which tensile stresses are formed in the material with constrained shrinkage, the ultimate tensile strength of concrete. Qualitative prediction of the potential resistance and durability of linings of water channels is possible when assessing the predisposition of concrete to cracking with subsequent changes in the volume, nature of pores and capillary passages, deformation and strength properties of the lining material.