SHRINKAGE CONCRETE STRAIN UNDER ALTERNATING TEMPERATURES

Abstract

The article focuses on the results of the research on concrete samples exposed to actual alternating
outdoor temperature. The temperature of concrete samples is measured during the research
process. It repeats the outdoor temperature with a short delay and smaller amplitude.
Shrinkage strains and intensity of their development in the process of aging are presented separately.
The dependence of the shrinkage on concrete antifreeze admixtures and values of the initial
strength of concrete is shown.
The intensity of the development of shrinkage strains of concrete with antifreeze admixtures
increases at the beginning phase, small positive temperatures contribute to the concrete hardening.
The intensity of the development of shrinkage strains of concrete with lower initial strength is higher.
Further intensity of the shrinkage strains development decreases and shrinkage strains repeat the
outdoor temperature change.
Keywords: concrete temperature, shrinkage concrete strain, the intensity of shrinkage, curing
of concrete.