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Information × Registration Number 0215U002378, 0110U007593 , R & D reports Title The influence of high temperature on crack stableness of concrete building construction popup.stage_title Head Parkhomenko Ruslan Vladimirovich, Registration Date 31-08-2015 Organization L'viv Fire State University of Vital Activity Safety popup.description2 The structure and volume. The work consists of introduction, three chapters, conclusions, list of references with 159 titles, presented 109 pages of printed text contains 43 figures and 9 tables; source list 15 pages. In high-temperature heating unprotected concrete in its structure undergoing complex processes that lead to decrease fracture toughness, strength and marginal basins. The reason for this is the formation of cracks due to occurrence of stress and strain gradients at the borders dividing phases and components of concrete. With increasing temperature of heat exposure intensity of these processes deepens. This reduces the fire resistance of concrete construction konstruktsiy. With increasing temperature indicators fracture, compressive strength, marginal basins that corresponds to the defragmentation of concrete, reduced compared to normal concrete hardening (basic series). The reason for this can be considered the formation of cracks due to occurrence of stress and strain gradients at the borders dividing phases and components of concrete due to different values of the coefficient of linear thermal expansion component of concrete. With increasing temperature of heat exposure intensity of these processes deepens. The maximum value of the energy potential fracture are characterized with concrete compressive strength in the range of 30 - 40 MPa. By increasing the compressive strength of concrete increases brittle fracture and reduced the area under downward branch line charts, and thus the effectiveness of the concrete in the supercritical stage deformation. Keywords: high-temperature heating, concrete, crack resistance, durability, limiting deflection. Product Description popup.authors Яковчук Роман Святославович popup.nrat_date 2020-04-02 Close