Open AccessReasons of cracks in floor slab panel
Author(s) -
Yuri Barabanshchikov,
Tatiana Belkina,
Kirill Semenov,
Sergey Zimin,
Stanislav Akimov,
Nikolai Ivanovich Vatin
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/896/1/012068
Subject(s) - shrinkage , slab , cracking , materials science , deformation (meteorology) , ground floor , structural engineering , core (optical fiber) , hardening (computing) , composite material , geology , geotechnical engineering , layer (electronics) , engineering , civil engineering
The article considers the problem of the formation of temperature and cracks in a reinforced concrete floor in thin 400 mm, connected by reinforcing outlets with internal reinforced concrete walls and the outer ring wall of the core of a high-rise building. During the hardening of the laid concrete, the formation of through cracks in the overlapping, extending from the walls and located across the corridor formed by the walls, was observed. The paper analyzes the possible causes of cracking. Cracking occurs due to the restriction of free temperature and shrinkage deformation of the floor slab by a rigid connection with the walls. The direction of the cracks indicates that tensile shrink stresses act along the walls. Cracks form during the cooling of the concrete floor, when the directions of the vectors of shrinkage and thermal deformation coincide. The work gives recommendations for the care of concrete floor structures.