On the influence of some technological factors on the quality of concrete of monolithic reinforced concrete structures
Abstract
On the influence of some technological factors on the quality of concrete of monolithic reinforced concrete structures
Incoming article date: 06.10.2021When accepting finished reinforced concrete structures, incl. monolithic, they are subject to requirements for strength, stiffness, crack resistance and durability. The quality of a monolithic reinforced concrete structure depends on the quality of work, the quality of materials, the quality of design solutions and the quality of regulatory documentation. According to SP 70.13330.2012, clause 5.18.1, "when accepting finished concrete and reinforced concrete structures ... you should check ... the quality of concrete for strength, and, if necessary, for frost resistance ...". Particular attention is required for massive monolithic reinforced concrete structures, during the construction of which, due to temperature-shrinkage deformations, it is possible to form an own stress field that exceeds its strength indicators at the stage of formation of the concrete structure, which may result in early cracking with subsequent development of cracks, which will not only negatively affect operational properties of the structure, but in principle can raise the question of the impossibility of its operation. The quality of concrete of a monolithic reinforced concrete structure is determined by both recipe and technological factors, the assessment of the degree of influence of which is an urgent task.
Keywords: massive monolithic reinforced concrete structures, crack resistance, durability, frost resistance, temperature-shrinkage deformation