EXPANSIVE CONCRETE COMPOSITE MODEL FOR PREDICTION SELF-STRESS MAGNITUDE IN EXPANSIVE FIBERCONCRETE

Abstract

In present paper expansive concrete composite model for prediction self-stress magnitude in triaxial restriction conditions are presented. Main model conditions on the basis of Effective Medium Theory and Solidification Theory are founded. In work are considered probabilities of expansive sulfo-aluminate type additive and basalt fiber partnering for chemical prestressing and strength concrete properties increasing. Use of basalt fiber, introduction of which in minimal amount due to disintegration on monofilament with great specific surface lead to concrete composite strength increase course of 3D-structure reinforcement effect and changing fracture toughness. Amount of expansive additive assign proceeding from achievement of necessary self-stress level. Maximum amount of basalt fiber limit to 5% cause to prevent percolation effect, but to provide formation of filament spatial framework. Proposed model allow with adequate degree of accuracy prognoses main characteristic of self-stressed concrete – self-stressing.