IntroductionFiber reinforcements have been widely used to improve the toughness, tensile properties, and cracking resistance of cement based materials. In light of current social concerns for sustainability, cellulosic fibers, which are renewable, biodegradable, environmentally friendly, and energy efficient, have been increasingly studied in recent years. Additionally, their widely availability, excellent mechanical properties, low density, good reinforcing effect, and low cost enable them to be used as potential alternatives to synthetic fibers in sustainable construction materials. The application of cellulosic fiber‐reinforced cement composites in roof sheet, beams, laminate, and interlocking blocks for column and walls. However, in the alkali environment of the Portland cement matrix, cellulosic fibers can be easily “corroded” and this always leads to a shortened service life of composites. The degradation of cellulosic fibers was firstly studied by Gram, who proposed a deleterious effect of Ca2+ elements on fibre degradation. Toledo Filho, and Sundararajan, reported the degradation behavior of different cellulosic fibers in alkaline medium (calcium and sodium hydroxide solutions). In addition to the loss of fiber flexibility and strength, crystallization of calcium hydroxide (CH), which is also a primary cement hydration product, in the fibers lumen, walls and voids was proposed by Toledo Filho et al.Cement
Advanced Engineering Materials – Wiley
Published: Jan 1, 2018
Keywords: ; ; ; ;
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