首页|高延性纤维增强混凝土配合比设计及拉伸性能试验研究

高延性纤维增强混凝土配合比设计及拉伸性能试验研究

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对高延性纤维增强混凝土(HS-ECC)的配合比及拉伸性能进行研究,分析水胶比、砂的级配、纤维长度、纤维掺量4种因素对HS-ECC拉伸性能的影响.结果表明:当水胶比为0.30 时,HS-ECC极限延伸率可达2.37%;采用最大粒径为0.63 mm的密集堆积级配砂制备HS-ECC,能提高基体与纤维的握裹力,提高HS-ECC的极限延伸率;当纤维长度为12 mm时,应变强化可以持续至应变为2.4%左右,是短纤维的2倍以上;随着纤维掺量增加,HS-ECC延性提高,当纤维掺量为2.0%时,可以得到理想的延性效果,实现了HS-ECC多缝开裂和应变强化.
Mix design and tensile performance testing of highly ductile concrete
Research on the mix proportion and tensile properties of high ductility fiber-reinforced concrete(HS-ECC),analyzing the influence of water cement ratio,sand gradation,fiber length,and fiber content on the tensile properties of HS-ECC.The results show that when the water-binder ratio is 0.30,the ultimate elongation of HS-ECC could reach 2.37%.Using densely packed graded sand with a maximum particle size of 0.63 mm to prepare concrete can improve the adhesion between the matrix and fibers,and increase the ultimate elongation of concrete.When the fiber length is 12 mm,strain strengthening can continue until the strain is about 2.4%,which is more than twice that of short fibers.As the fiber content increases,the ductility of HS-ECC improves.When the fiber content is 2.0%,ideal ductility effect can be obtained,achieving HS-ECC multiple cracking and strain strengthening.

high ductility concretemix proportion designtensile properties

惠心、徐成昊、毛东、许勇、马新伟

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哈尔滨工业大学(威海)海洋工程学院,山东威海 264209

威海建设集团有限公司,山东威海 264209

高延性混凝土 配合比设计 拉伸性能

2024

新型建筑材料
中国新型建筑材料工业杭州设计研究院

新型建筑材料

CSTPCD
影响因子:0.569
ISSN:1001-702X
年,卷(期):2024.51(9)