Abstract
In this study, we investigated the influence of the addition of sisal and glass fibres on the mechanical properties of polymer concrete (PC). These types of concrete are used in many modern civil engineering applications. The prismatic specimens sized according to ASTM C580-02 were elaborated with a PC constituted by 14% constant mass of polyester resin matrix, a granular skeleton based on sand and powder marble. The reinforcement with 60% sand and 26% marble powder adopted in this investigation is the best formulation found in previous authors work. This composition was reinforced by 1 and 2% of sisal and glass fibres, the first one having lengths of 6 mm or 12 mm, however, the second unidirectional cut into bands. These specimens were subjected to 3-point bending monotonic loading. The results obtained were discussed and compared with those obtained for control beams without fibres reinforcement. It is important to note that the incorporation of the glass fibre contributes to an increase of the ultimate load of the polymer composite material produced, however, the addition of the sisal fibre lead to its decreases. In addition, the incorporation of 2% of sisal fibre having 6 mm length leads to a reduction of 26% of the mass of the specimens.
Highlights
Polymer concrete (PC) is a material manufactured completely or partially by replacing the Portland cement with a polymer
The loads/displacements behaviour of the control beams presented in Fig.4 occur in two phases: the first one is practically linear until reaching the ultimate load, while sometimes small staircase shapes are noted due to the detachment of sand grains
The analysis of the results shows clearly that the addition of the glass fibre bands leads to the best behaviour
Summary
Polymer concrete (PC) is a material manufactured completely or partially by replacing the Portland cement with a polymer. In a study conducted by Reis (2006) using 2% of the coconut, bagasse (sugar residue) and banana fibres as addition in the PC He concluded that coconut and bagasse fibres improve the mechanical properties of PC both its strength and its breaking energy, while banana fiber has only increased the breaking energy. Benzannache et al (2018) have shown in an earlier study that the incorporation of marble waste has improved the mechanical and physical properties of polymer concrete. For this purpose, the main objective is to study the effect of the additions on the mechanical strength of the PC beams subjected to 3-point bending. Beams with the incorporation of sisal fibre cut in two different lengths (6 mm and 12 mm) and randomly distributed in the mass have been studied
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