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Wpływ mikrowłókien szklanych na właściwości zapraw cementowych

100%

Łakomy J. , Prokopski G.

2004

tom z. 37[211], cz.1

245-252

In this paper the results of mortars with glass microfibers investigations are presented. The main objective of this work was to evaluate the influence of glass microfibers on shrinkage cracking, physical and mechanical properties of mortars with constant amount of superplasticizer. Obtained results showed that glass micrfibers have significant influence on shrinkage cracking of mortars. For investigated mortars with microfibers cracks did not appear or occurred later and the cracks widths were several times smaller than in mortars without fibers. The addition of microfibers decreased workability, and gravity and increased the air content in fresh mortars. It was found that mechanical properties of mortars increased when the volume fraction of fibers exceeded 0,3%. Obtained results showed that glass fibers significantly improved the cracking resistance and can be use as shrinkage reinforcement.

Dyeing of glass fibres by the sol gel method

75%

Chládová A. , Wiener J. , Luthuli J. M. , Zajícová V.

Autex Research Journal

2011

tom Vol. 11, no. 1

18--23

This study focused on the dyeing of glass fibres by colour layers created by the sol gel method. Glass fibres are used as a typical example of fibres with non-ideal dyeing properties. Glass and similar dyes are rigid, the internal fibre structure is non-porous and the glass transition temperature is very high. The sol gel method is used for the fixation of selected dyes on the fibre surface. In this study , we compared basic, disperse and met al complex dyes. The properties of coloured textiles were tested by standard and modified fastness tests. The stability to temperature, washing and light was different according the basic properties of the used dyes. The results of the tests are discussed in this paper. The process of dyeing fibres with sol simultaneously results in reasonable dye fastnesses to the fibres; at the same time, bright and dark shades can also be obtained. The sol used is based on the blending of 3-trimethoxysilyl propyl methacrylate in isoprop anol with supporting chemicals (water , HCl, benzoyl peroxide).