Denotes aneedin an engineering analytical correspondence between the loadand longitudinal strains of the composite columns. Experimental data on concrete longitudinal strains in the state of passive lateral compression are presented. The generalized form of correspondence for curvilinear "stress-strain" diagramof concrete the state of passive lateral compression is given.
Keywords: composite columns, "stress-strain"diagram, passive lateral compression of the concrete
Domestic construction materials industry produces expansive binders providing the concrete self-stress up to2MPa. A hypothesis on the catalytic role of lime in the formation of the active ettringiteis introduced. On the base of the hypothesis a proposal of the self-stress kinetics optimization with sulfate-containing mineral supplements, neutralizing lime in the early stages of the cement stone structure formation is given.
Keywords: cement, straining cement, mineral supplements, self-stress kinetics