Decorative concrete with hybrid glass fibre: design and first results of the experiment

Abstract

The first results of experiment in the study aimed at getting high performance decorative concrete are presented. Varied in the experiment were the content of zeolite as active mineral additive, ratio of fine to coarse sand, dosage of superplasticizer, quantities of short and relatively long alkali resistant glass fibres, at constant content of the binder (white cement + zeolite) and the aggregate. Plastic strength of concrete mix (at 10 minutes intervals), water-cement ratio at equal workability, early linear shrinkage and early compression and bending strength, other mechanical and performance properties were determined for 27 compositions according to design of the experiment, enabling to describe the dependencies of material characteristics on composition factors with 2nd order experimental-statistical models. The curves of plastic strength are shown andnumerical characteristics generalising them are proposed and estimated. The later allow the processes of initial structure formation for various mix proportions to be compared and analysed.