共聚甲醛纤维混凝土性能研究  

Experimental study on properties of POM fiber reinforced concrete

作　　者：刘飞鹏 成小东[2] 刘力丰 许婧 张萌芽 卢治元 LIU Feipeng;CHENG Xiaodong;LIU Lifeng;XU Jing;ZHANG Mengya;LU Zhiyuan(Southwest Investigation and Planning Institute,State Forestry and Grassland Administration,Kunming 650203,China;Yunnan Water Resources and Hydropower Engineering Co.Ltd.,Kunming 650223,China;Yunnan University,Kunming 650501,China;Yunnan Vocational College of Water Resources and Hydropower,Kunming 650000,China)

机构地区：[1]国家林业和草原局西南调查规划院,云南昆明650203 [2]云南省水利水电工程有限公司,云南昆明650223 [3]云南大学,云南昆明650501 [4]云南水利水电职业学院,云南昆明650000

出　　处：《新型建筑材料》2024年第11期35-38,76,共5页New Building Materials

基　　金：云南省教育厅科学研究基金项目(2023J1974)。

摘　　要：在混凝土中掺入共聚甲醛(POM)纤维,通过设计C25~C50强度等级的普通混凝土和POM纤维混凝土,研究POM纤维对不同强度等级混凝土拌合物性能、抗冲磨强度、抗渗性能、抗冻融性能、抗压强度的影响。结果表明:掺入POM纤维几乎不影响混凝土的拌合物性能;掺入POM纤维能有效提高混凝土的抗冲磨强度,C50混凝土的增量比最大,为142.5%;掺入POM纤维不影响混凝土的抗渗等级,但平均透水高度增大;200次冻融循环后,POM纤维混凝土质量损失得到明显改善,掺入POM纤维能提高混凝土的韧性和抗裂性,能有效减缓混凝土的冻胀损伤;掺入POM纤维能提高混凝土的抗压强度,对C40混凝土的影响最明显,7、28 d抗压强度较普通混凝土分别提高8%、10%。Incorporating polyoxymethylene(POM)fibers into concrete,by designing ordinary concrete and POM fiber concrete with strength grades of C25 to C50,the study investigates the impact of POM fibers on the mixing properties,impact resistance,permeability resistance,freeze-thaw resistance,and compressive strength of concrete with different strength grades.The results indicate that the incorporation of POM fibers has negligible impact on the workability of the concrete mix.The addition of POM fibers significantly enhances the abrasion resistance of concrete,with the highest increase observed in C50 concrete,reaching 142.5%.The inclusion of POM fibers does not affect the permeability grade of concrete,but it does increase the average height of water penetration.After 200 freeze-thaw cycles,the mass loss of POM fiber-reinforced concrete specimens is notably improved,indicating that POM fibers can enhance the toughness and crack resistance of concrete,effectively mitigating the damage caused by freeze expansion.Incorporating POM fibers can enhance the compressive strength of concrete,with the most significant effect observed in C40 concrete,where the 7,28 d compressive strengths are increased by 8%,10%,respectively,compared to ordinary concrete.

关 键 词：POM纤维 混凝土 抗冲磨强度 抗渗性能 抗压强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]