摘要
基于美国ASTM C1550标准,采用圆板试件研究了新型粗聚烯烃纤维混凝土的弯曲韧性,探讨了纤维掺量和纤维长度对纤维混凝土板能量吸收值的影响规律.通过与梁弯曲韧性试验方法的比较,发现圆板试验更加适合评价粗合成纤维混凝土的弯曲韧性.随着粗聚烯烃纤维掺量、纤维长度的增加,纤维混凝土板的能量吸收值逐渐提高.按照日本JSCE-SF4韧性评价方法,掺量为6,8,11kg/m3的粗聚烯烃纤维混凝土梁的韧性指标,比相同掺量的中等弹模纤维增强混凝土分别提高了101%,68%,76%,比掺量为15.6kg/m3的钢纤维增强混凝土分别提高了65%,90%,138%.
Based on the standard of ASTM C1550, test of circular plate was for the first time introduced in China to examine the effect of a new kind of macro-polyolefin fiber on the flexural toughness of fiber rein- forced concrete plate. Compared with the flexural toughness test of beams, it is shown that the test of cir- cular plates is more suitable to evaluate the flexural toughness of macro-synthetic fiber reinforced concrete. The energy absorbtion value increases with increase in fiber length and volume. Applying the evaluation system of Japan JSCE-SF4, for the same fiber quantity 6, 8, 11 kg/ma, the flexural toughness index of polyolefin fiber reinforced concrete was increased by 101%, 68%, 76% higher than that of mid-elastic modular fiber respectively and 65%, 90%, 138% higher than that of 15.6 kg/ma steel fiber.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2014年第2期228-233,共6页
Journal of Building Materials
基金
国家自然科学基金资助项目(51378032)
教育部博士点基金资助项目(20131103110017)
关键词
粗聚烯烃纤维
弯曲韧性
韧性指标
macro-polyolefin fiber
flexural toughness
flexural toughness index
