Experimental-statistical models of properties of modified fiber-reinforced fine-grained concretes

Abstract

Results of investigation of physico-mechanical characteristics of fiber-reinforced fine-grained concretes with polyfunctional modifying additives are shown. The methodology of construction of experimental-statistical models «modifying additives, dispersible fibers – property» for study of density at normal humidity conditions, the limit of compressive strength and the limit of tensile strength in bending cement composites set out. Graphic reflection of the applied polynomial system for every description was a secondary model from 7 triangular Gibbs-Roseboom’s diagrams, built with the use of the program Statistica 10.0.1011 and fixed in 7 points of bearing triangle with the isolines of maximums of the investigated properties. According to the results of experimental study the most optimal complexes additives and dispersed fibers for the purpose of increasing the investigated characteristics of cement composites are selected.

Keywords

• Experimental-statistical models
• modifying additives
• dispersible fibers
• fiber-reinforced fine-grained concrete