1.桂林理工大学 广西绿色建材与建筑工业化重点实验室， 广西 桂林 541004;2.桂林理工大学 土木工程学院， 广西 桂林 541004;3.陆军工程大学 爆炸冲击防灾减灾国家重点实验室， 江苏 南京 210007
易 金（1991—），女，江西宜春人，桂林理工大学助理研究员，博士生. E-mail： tyijin16@163.com
王 磊（1977—），男，山东兖州人，桂林理工大学教授，博士生导师，博士. E-mail： tianmu77@163.com
TU528.572
国家自然科学基金资助项目（52178194）；广西自然科学基金资助项目（2024GXNSFGA010002）；广西绿色建材与建筑工业化重点实验室项目（桂科能22-J-21-15）
1.Guangxi Key Laboratory of Green Building Materials and Construction Industrialization， Guilin University of Technology， Guilin 541004， China;2.School of Civil Engineering， Guilin University of Technology， Guilin 541004， China;3.State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact， Army Engineering University of PLA， Nanjing 210007， China
采用聚丙烯纤维（PPF）对珊瑚混凝土进行增韧和降脆处理.结果表明：适当增加PPF的掺量或长度能在一定程度上提升珊瑚混凝土的抗弯强度与抗拉强度；当PPF长度过长或掺量过大时，PPF卷曲或聚团会引起珊瑚混凝土的局部缺陷，降低增韧效果；PPF增强珊瑚混凝土的拉伸应力-应变曲线符合三线性本构模型，极限拉应变提升了52%~333%，延性指数高达10.89；尽管PPF能显著提升珊瑚混凝土的韧性，但也可能导致其密实度和抗压强度有所降低，建议在实际应用中精确控制PPF的掺量和长度，以确保珊瑚混凝土既能获得所需的韧性，又能保持适当的密实度和抗压强度.
Polypropylene fiber（PPF） was employed to toughen and reduce the brittleness of coral concrete. The results indicate that by appropriately increasing the content or length of PPF， the flexural and tensile strength of coral concrete can be significantly enhanced to a certain extent. However， if the length of PPF is too long or the content is too large， the curling or clustering of PPF may cause local defects in coral concrete， thereby reducing the toughening effect. The tensile stress-strain curves of PPF-reinforced coral concrete conform to the trilinear constitutive model， with the ultimate tensile strain increasing by 52% to 333%， and the ductility index reaching as high as 10.89. Although PPF can significantly improve toughness， it may also lead to a reduction in the density and compressive strength of coral concrete. Therefore， in practical applications， it is suggested to consider the negative effects brought about by PPF reinforcement in a comprehensive manner and make appropriate adjustments. Therefore， in practical applications， it is recommended to precisely control the content and length of PPF to ensure that the coral concrete not only gains the necessary increase in toughness but also retains suitable levels of compactness and compressive strength.
易金,王磊,李增,张继旺,池俊生.聚丙烯纤维增强珊瑚混凝土韧性试验研究[J].建筑材料学报,2024,27(10):913-921
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