The Influence of Temperature Changes on Concrete Pavement

Abstract

The paper deals with the influence of temperature changes on concrete pavement. Due to differences in temperature on the upper and the lower surface of a concrete slab, the bending stress is created, resulting in concrete slab deformation. During the process of heating, the difference in temperature between the upper and the lower surface of pavement is created as a result of heat conduction. The upper surface has a tendency to expand (tense), whereas the lower one does not alter its dimensions, which results in generating the bending stress. Concrete pavement is most commonly placed in zones with extremely heavy traffic load as well as at bus stops. The analysis was carried out at bus stops in the city of Novi Sad for three different types of slab thickness. The thickness of slabs was 20, 22 and 24 cm. The testing was conducted in the longitudinal and transverse direction of the concrete pavement, both in the middle and on the edge of a slab. During the analysis of results, a conclusion was drawn that the concrete slabs were of different dimensions and thickness, and that they were placed on different subgrade reactions. The maximum values of stress were recorded in the middle of a concrete slab, in slabs whose thickness amounted to 24 cm, while the minimum stresses were identified in slabs which were 20 cm thick. The paper presents the stresses of concrete slabs, caused by changes in temperature, which depend on the subgrade reaction and dimensions of concrete slabs.

Tests on the Influence of Cyclic Loading and Temperature on the Behaviour of Flexible Pavement Reinforced by Geogrids with Numerical Simulation

“…In addition to the traditional techniques based on the application of asphalt concrete layer as overlay or the application of modified bitumen (MB) layers, or even high modulus asphalt concrete (HMAC), can significantly improve the mechanical properties of the pavement, but these methods remained mute in the case of the appearance and propagation of cracks on the pavement surface. Several authors have tried to explain the phenomenon of crack propagation, as apparent surface distresses, as well as the process of propagation of these cracks from a deteriorated layer to the pavement surface [7,8]. In order to overcome these reflection cracks, different techniques have been developed in the past, the most important of which is the application of geosynthetic materials [9,10].…”