Degradation of recycled PET fibers in Portland cement-based materials

被引：136
|
作者：
Silva, DA
Betioli, AM
Gleize, PJP
Roman, HR
Gómez, LA
Ribeiro, JLD
机构：
[1] Univ Fed Santa Catarina, Dept Civil Engn, BR-88040900 Florianopolis, SC, Brazil
[2] Univ Fed Rio Grande Sul, Porto Alegre, RS, Brazil
来源：
CEMENT AND CONCRETE RESEARCH | 2005年 / 35卷 / 09期
关键词：
PET fiber reinforcement; degradation; Portland cement; SEM; FTIR;
D O I：
10.1016/j.cemconres.2004.10.040
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In order to investigate the durability of recycled PET fibers embedded in cement-based materials, fiber-reinforced mortar specimens were tested until 164 days after mixing. Compressive, tensile, and flexural strengths, elasticity modulus, and toughness of the specimens were determined. The mortars were also analyzed by SEM. The results have shown that PET fibers have no significant influence on mortars strengths and elasticity modulus. However, the toughness indexes 15, 110, and 1,0 decreased with time due to the degradation of PET fibers by alkaline hydrolysis when embedded in the cement matrix. Fourier transform infrared spectroscopy (FT-IR) and SEM analysis of PET fibers immersed and kept for 150 days in alkaline solutions supported the conclusions. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1741 / 1746
页数：6
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