Proposals on calculating the differential properties of concrete

Abstract

Background: The paper dwells upon calculating the differential structural properties of centrifugated and vibration-centrifugated concrete as a function of the manufacturing parameters. Methods: One finding is that different layers of centrifugated and vibration-centrifugated concrete are exposed to forces of varying magnitude, resulting in these layers differing significantly in density, strength, strain, and elastic modulus. Another finding is that it is the centrifugal and centripetal forces that are key factors to be applied as arguments in calculational dependencies. Thus, the versatile calculational dependencies that make adjustments for changes in the structural properties of concrete should use these properties or their increments as functions, and the rotation inertia forces as arguments, which are in turn a function of distance from the center of rotation and the angular rotation speed. Results: This research has thus produced calculational dependencies for differential adjustment for change in all the concrete properties that have to be invoked in calculation. Conclusions: Strength- and strain-related properties of concrete that vary depthwise (i.e. across the section) are applied in the calculation procedures for more accurate and complete utilization of the available load-carrying capacity of concrete elements.