Crack-resistance of the reinforced concrete wall under conditions of temperature deformation constrained by the foundation

The article considers the problems of temperature and contractible cracks formation in thin (200-300 mm) and extensional reinforced concrete walls constructed on hardened concrete foundation. The temperature gradients in walls of small thickness are insignificant and do not cause dangerous tensile stresses, however, the hardening of fresh concrete is often accompanied by the formation of vertical cracks starting at the area of contact with the base and extending upward, sometimes to the full height of the wall. Cracking in such cases occurs due to the thermal deformation constraint by the wall base. Generally, the process of walls cooling after maximum self-heating represents the main danger, when the thermal deformation acts in the same direction with shrinking, that causes the tensile stresses. The aim of the research is to verify the efficiency of the proposed methods of thermal cracking resistance by the results of thermal stress strain state calculation of the reinforced concrete wall rigidly connected to the foundation...