A new treatment for coconut fibers to improve the properties of cement-based composites – Combined effect of natural latex/pozzolanic materials

Abstract

A B S T R A C TThis paper presents the results of experimental study with a new coconut fiber-cement composite (CFC). To obtain a material with improved performance in order to decrease the amount of calcium hydroxide present on the fiber surface, four forms of coconut fiber treatment were tested. Some combinations of natural latex, water and pozzolanic materials (silica fume or metakaolin) were evaluated by degradation test and accelerated aging through cycles of wetting and drying CFC samples. To determine the mechanical properties obtained from each treatment, flexural tests on CFC composites were performed. After the flexural tests, the fibers were removed from the specimens and analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier Transform Infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The results indicate that the treatment carried out with the natural latex polymer film combined with a pozzolan layer improved the performance and durability of the CFC.

Plant Fiber Reinforced Biocomposite: Properties and Applications

“…Somatic qualifications from plant fibers are actually impacted out of the chemical construction for example rating on polymerization, inducement and crystallinity affected with situations throughout progress for plants furthermore like extrusion ways utilized [2]. A large quantity of versatility was in fiber qualifications are attached to the fibers are afflicted out of component from plant, attribute of plant and situation [2]. Various fibers have diverse extents and cross-sectional areas and also varied imperfections for example micropressings or pits or cracks.…”

“…Nowadays natural fibers have been used more than commercial fibers because of its qualifications which are renewability, unique power and weak density. The low cost of natural fibers and their sensitivity to the environment have been very effective in reducing the use of commercial fibers [2]. Plant fiber strengthen composites which names as PRFCs are distinguished according to their production methods, the kind of fiber used.…”

“…Plant fibers have the potential to be used instead of glass fibers in composite materials due to their improved mechanical and competitive properties with glass fibers [1]. Scientists and technologists [2][3][4][5][6][7] have been continued researches on PFRCs recently because having better qualifications than commercial composites. There is increasing interest especially for whole of these good properties.…”

Compósito cimentício com elevado teor de fibra de coco tratada: propriedades físicas e durabilidade

“…Nesse sentido, o objetivo do presente trabalho é produzir um compósito cimentício com elevado teor de fibra de coco utilizando o tratamento protetor desenvolvido por SILVA et al [13] e avaliar suas propriedades físicas e durabilidade.…”

Avaliação da influência da umidade relativa da atmosfera de cura na carbonatação de materiais de fibrocimento

“…Por se tratarem de materiais hidrofílicos as fibras vegetais ao absorverem água, absorvem também o Ca(OH) 2 disponível na matriz, responsável por mineralizar ou petrificar as fibras, degradando seus constituintes e prejudicando suas propriedades de reforço (WEI; MA; THOMAS, 2016; WEI; MEYER, 2015). Tal fato tem motivado pesquisadores de diversas áreas a buscarem alternativas para mitigar a degradação das fibras vegetais e, consequentemente, melhorar a durabilidade dos produtos de fibrocimento (ALMEIDA et al, 2013;FERREIRA et al, 2017;SILVA et al, 2017).…”