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材料导报  2024, Vol. 38 Issue (1): 22060231-8    https://doi.org/10.11896/cldb.22060231
  无机非金属及其复合材料 |
聚酯纤维泡沫混凝土力学性能及孔结构研究
王述红*, 贡藩, 尹宏, 修占国
东北大学资源与土木工程学院,沈阳 110819
Study on Mechanical Properties and Pore Structure of Foamed Concrete Reinforced with Polyester Fiber
WANG Shuhong*, GONG Fan, YIN Hong, XIU Zhanguo
School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
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摘要 纤维的掺加可有效地改善泡沫混凝土抗压强度低、脆性特征显著的缺陷,增强其工程适用性。本工作针对聚酯纤维对泡沫混凝土力学性能的改善开展试验研究,选定密度等级为700 kg/m3的泡沫混凝土,考虑不同纤维体积掺量(0.1%、0.2%、0.3%和0.4%)对其抗压强度、抗折强度、劈裂抗拉强度以及延性的影响。结果表明:纤维掺量为0.1%时,材料表现出较优的抗压和劈裂抗拉性能,28 d强度分别增加了86.4%和91.3%;纤维掺量为0.2%时,材料表现出较优的抗折性能,28 d抗折强度提升了39.1%。试样破坏形态和应力-应变曲线表明,聚酯纤维可有效地提升泡沫混凝土的延性。最后,运用图像分析处理法分别获得了五组试件的孔结构参数,从细观孔结构的角度讨论了聚酯纤维对泡沫混凝土抗压强度的影响机理。
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王述红
贡藩
尹宏
修占国
关键词:  泡沫混凝土  聚酯纤维  力学性能  孔结构  图像处理    
Abstract: The addition of fiber can effectively improve the defects of low compressive strength and brittleness of foamed concrete and enhance its engineering applicability. A series of experiments were carried out to study the improvement of mechanical properties of foamed concrete by pol-yester fiber. The foamed concrete with density class 700 kg/m3 was selected. The influence of different fiber content (0.1%, 0.2%, 0.3% and 0.4%) on compressive strength, splitting tensile strength, flexural strength and ductility of materials was considered. The results showed that when the fiber content was 0.1%, the material showed better compressive and splitting tensile properties. The 28 day strength increased by 86.4% and 91.3% respectively. When the fiber content was 0.2%, the material showed better flexural properties and the flexural strength increased by 39.1% in 28 days. The failure modes and stress-strain curves of the specimens indicate that polyester fiber can effectively enhance the ductility of foamed concrete. Finally, the pore structure parameter of five groups of specimens were obtained by image analysis and proces-sing method. The mechanism of the effect of polyester fiber on the mechanical properties of foamed concrete was discussed from the perspective of pore structure.
Key words:  foamed concrete    polyester fiber    mechanical property    pore structure    image processing
发布日期:  2024-01-16
ZTFLH:  TU528  
基金资助: 国家自然科学基金(U1602232);中央高校基本科研业务专项资金(N2301005;N2301006)
通讯作者:  王述红,东北大学资源与土木工程学院教授、博士研究生导师。2000年获得东北大学结构工程专业博士学位后留校任教,主要从事岩土工程相关的教学和科研工作。发表学术论文200余篇,包括Construction and Building Materials、《工程力学》等。shwangneu@126.com   
引用本文:    
王述红, 贡藩, 尹宏, 修占国. 聚酯纤维泡沫混凝土力学性能及孔结构研究[J]. 材料导报, 2024, 38(1): 22060231-8.
WANG Shuhong, GONG Fan, YIN Hong, XIU Zhanguo. Study on Mechanical Properties and Pore Structure of Foamed Concrete Reinforced with Polyester Fiber. Materials Reports, 2024, 38(1): 22060231-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.22060231  或          http://www.mater-rep.com/CN/Y2024/V38/I1/22060231
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