Dependences of strength and deformation properties of heavy concrete under early loading under conditions of negative temperatures are obtained on the basis of experimental data. Empirical coefficients are proposed to describe the measure of concrete creep through the temperature function. A significant increase in the strength of concrete hardening under load during freezing and thawing has been confirmed. The results can be used to assign the parameters of early loading and calculation of monolithic buildings at the stage of their construction.

Keywords: monolithic buildings, building structures, heavy concrete, strength, deformation, creep, creep measure, early loading, loading intensity

The article collects and structures information about the effect of chemical additives on the properties of concrete and concrete mix. The relevance of topic is due to the fragmentation of the background information and the lack of data on the study of new additives. The presentation of information in the form of a morphological table simplifies the selection of additives and reduces the risk of errors in the selection of concrete composition. Mineral additives were not considered in this article.

Keywords: construction materials, concrete, concrete mix, chemical additives, concrete properties, concrete composition, modified concrete