EFFECT OF WASTE FIBRE MATERIAL ON ENGINEERING PROPERTIES OF RED SOIL

This paper aims to check the effectiveness of waste fibre material on the engineering properties of red soil. The main purpose is to select some waste fibre materials which helps in enhancing the engineering properties of soil. Soil reinforcement has been introduced into the field of geotechnical engineering for many years in order to improve the properties of ground soil in specific engineering projects. Considering these, a series of tests were performed with red soil with waste fibre as reinforcement at various percentage content to find out its effects on the soil and to find whether the particular soil- reinforcement combination is useful.

Evaluation of the Sorption Phenomena Mechanism of Polyacrylonitrile Fibres for Selected Dyes in the Aspect of Structural Changes Resulting from Thermal Stabilisation Processes

The aim of the research was to analyse the influence of the initial heat treatment of polyacrylonitrile fibres on their sorption properties in relation to selected basic and disperse dyes, in order to select the dyeing variants most beneficial from the point of view of increasing the sorption capacity of commonly used dyes and improving the dyeing process. Research was carried out on a fibre produced on an industrial scale, using dyes of basic application importance, which differ in the diffusion properties of the molecules and the mechanism of binding with the fibre material. Thermal treatment of the fibre was carried out in various media (air, water, steam), with various variants of the temperature and its duration, i.e. under the conditions commonly used in fibre preprocessing processes and their “improvement”. During the research, several different measurement methods were used to assess changes in the molecular and supramolecular structure of the fibre material: the infrared absorption spectroscopy method, the critical fibre dissolution measurement method, the densitometric method, and the interferential polarisation microscopy method. Fibre sorption changes resulting from the modification of the structure of the fibre under the influence of thermal treatment were analysed from the point of view of improving the efficiency of dye use and shortening the dyeing time based on commonly accepted values of the sorption index Cb and kinetic sorption index: t0.5 for basic dyes and t0.7 for disperse dyes.

Flexural Strength Behavior of T-Shaped Beam-Column Joint with Varying Polypropylene Fibre

In times like this earthquakes are most commonly occurring phenomenon in every part of the world. It’s crucial to make sure ductility of the structure is high, which is it should seamlessly distort non-elastically and diffuse forces with no major destruction. For any structural frames shear forces and bending moments are concentrated at the intersecting area. One of such areas is beam-column (B-C) joint. These are the most effected failure zones. The present work deals with experimental study of a T-shaped beam-column joint. From the literature, Polypropylene fibre have improved many desired properties of concrete such as flexural strength, breaking point etc. Therefore introduction of this fibre material into beam-column joint can improve joint properties. Previous studies on this fibre do not convey any important work that has been done on beam-column joint using this fibre, specifically pinned under axial force. In this study, 1/3rd scaled specimens of reinforced concrete (plane RC and RC fibres) T-shaped beam-column joint casted and tested for incremental loadings. All the specimens have been detailed by the provisions of IS: 13920, IS: 456. These specimens were tested by applying sequentially incremented repeated loads using Universal Testing Machine (UTM) of 100kN capacity. The results were correlated in different ways such as, flexural strength, hardness, force dissipation and ductility. Hence, in the present research this fibre material is used in T-shaped B-C joint to see the changes occurred in stiffness and flexural strength, of the joint