ABSTRACT
This paper aims to analyse the effects of alkaline aqueous solutions on coconut fiber as a function of time. The process intended to simulate the conditions of degradation that occurs in the coconut fibers embedded in cementitious matrix. The fibers inserted in alkaline solutions with different concentrations were analysed by gravimetric, scanning electron microscopy and Fourier Transform Infrared spectroscopy (FTIR) methods. Alternative solutions have been studied by the technique of measuring UV–vis spectroscopy, during the second half of 2013. According to the increasing concentration of solutions and the time of contact with coconut fibers, a greater fiber surface modification occurred, by removal of surface constituents, such as cuticles, globular particles, pits and also lignin.
Key words:
degradability; natural fibers; cement matrix
