纤维混凝土抗冻性能研究
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摘要
为研究冻融循环条件下纤维混凝土抗冻性能,采取快速冻融试验对不同掺加方式下钢纤维、聚丙烯纤维混凝土性能进行研究。并通过SEM分析了其微观结构。试验结果表明,在纤维掺量固定时,不同纤维掺加方式的混凝土性能有显著不同。随冻融循环次数的增加,其质量损失、动弹性模量、抗压、抗折强度都有显著不同变化,混杂纤维混凝土性能较单一纤维混凝土好,层布式纤维混凝土性能较整体式纤维混凝土好。
In order to study the frost resistance performance of fiber reinforced concrete under freeze-thaw cycle,the performance of steel fiber and polypropylene fiber concrete under different mixing methods was studied by rapid freezing and thawing test.And its microstructure was analyzed by SEM.The test results show that the concrete properties of different fibers were significantly different when the fiber content was fixed.With the increase of the number of freeze-thaw cycles,the mass loss,the dynamic elastic modulus,the compression strength and the flexural strength had different changes.The performance of the hybrid fiber concrete was better than that of the single fiber concrete and the layer fabric fiber.The performance of layered fiber reinforced concrete was better than that of integral fiber reinforced concrete.
In order to study the frost resistance performance of fiber reinforced concrete under freeze-thaw cycle,the performance of steel fiber and polypropylene fiber concrete under different mixing methods was studied by rapid freezing and thawing test.And its microstructure was analyzed by SEM.The test results show that the concrete properties of different fibers were significantly different when the fiber content was fixed.With the increase of the number of freeze-thaw cycles,the mass loss,the dynamic elastic modulus,the compression strength and the flexural strength had different changes.The performance of the hybrid fiber concrete was better than that of the single fiber concrete and the layer fabric fiber.The performance of layered fiber reinforced concrete was better than that of integral fiber reinforced concrete.
引文
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[18]Qian C X,Stroeven P.Fracture properties of concrete reinforced with steel-polypropylene hybrid fibers[J].Cement and Concrete Composites,2000,22(5):343-351.
[2]Yu Hongfa,Sun Wei,Ma Haiyan,et al.Analysis of damage and deterioration parameters of concrete subjected to freeze-thaw and corrosion factors[J].Journal of Building Science and Engineering,2011,28(4):1-8(in Chinese).余红发,孙伟,麻海燕,等.冻融和腐蚀因素作用下混凝土的损伤劣化参数分析[J].建筑科学与工程学报,2011,28(4):1-8.
[3]Sun Jiaying.Study on frost resistance of fiber reinforced concrete[J].Journal of Building Materials,2013,16(03):437-440(in Chinese).孙家瑛.纤维混凝土抗冻性能研究[J].建筑材料学报,2013,16(03):437-440.
[4]He Rui,Li Dan,Wang Shuai,et al.Frost resistance of PE/HPP hybrid fiber reinforced concrete[J].Journal of South China University of Technology(Natural Science),2017,45(4):87-94(in Chinese).何锐,李丹,王帅,等.PE/HPP混杂纤维混凝土的抗冻性能[J].华南理工大学学报(自然科学版),2017,45(04):87-94.
[5]Zhao Bingbing,He Jingjing,Wang Xuezhi,et al.Test of frost resistance of basalt-polypropylene hybrid fiber concrete[J].Journal of Liaoning Technical University(Natural Science),2015,34(12):1402-1407(in Chinese).赵兵兵,贺晶晶,王学志,等.玄武岩-聚丙烯混杂纤维混凝土抗冻性试验[J].辽宁工程技术大学学报(自然科学版),2015,34(12):1402-1407.
[6]He Bai,Xie Lingzhi,Liu Quan,et al.Effects of different hydrophilic fibers on the frost resistance of concrete[J].Journal of Sichuan University(Engineering Science),2016,48(2):225-230(in Chinese).何柏,谢凌志,刘泉,等.不同亲水性能的纤维对混凝土抗冻耐久性的影响[J].四川大学学报(工程科学版),2016,48(02):225-230.
[7]Chen Shengping.Mechanical properties of steel fiber reinforced concrete after freeze-thaw[J].Journal of Hubei U-niversity of Technology,2016,31(1):94-97(in Chinese).陈升平.钢纤维混凝土冻融后的力学性能研究[J].湖北工业大学学报,2016,31(01):94-97.
[8]Darole J S,Kulkarni V P,Shaikh A P.Effect of hybrid fiber on mechanical properties of concrete[J].International Journal of Engineering Research and Applications,2013,3(4):1408-1411(in Chinese).
[9]齐桂华.玄武岩纤维增强混凝土的抗冻性试验研究[D].长春:吉林大学,2016.
[10]Zhao Jun,Yuan Chengfang,Zhang Ge.Frost resistance of polypropylene fiber reinforced concrete after high temperature[J].Journal of Materials Science and Engineering,2017,35(4):534-537(in Chinese).赵军,元成方,张戈.高温作用后聚丙烯纤维混凝土的抗冻性[J].材料科学与工程学报,2017,35(04):534-537.
[11]Hosinieh M M,Aoude H,Cook W,D,et al.Behavior of ultra-high performance fiber reinforced concrete columns under pure axial loading[J].Engineering Structures,2015,99:388-401.
[12]中华人民共和国建设部.普通混凝土长期性能和耐久性能试验方法标准:GB/T 50082-2009[S].北京:中国建筑工业出版社,2010.
[13]中国工程建设标准化协会.纤维混凝土试验方法标准:CECS13-2009[S].北京:中国计划出版社,2010.
[14]混凝土抗快速冻融性试验方法:ASTM C666/C666M-2015[S].2015.
[15]韩建宏.层布式混杂纤维混凝土力学性能及冻融损伤试验研究[D].咸阳:西北农林科技大学,2010.
[16]Nili M,Azarioon A,Danesh A,et al.Experimental study and modeling of fiber volume effects on frost resistance of fiber reinforced concrete[J].International Journal of Civil Engineering,2016,16(4):1-10.
[17]Zhang Haipeng,Chen Meng,Bai Shuai,et al.Experimental study on compressive and tensile properties of layered hybrid fiber reinforced concrete[J].Journal of Hydraulic and Architectural Engineering,2015,13(5):131-135(in Chinese).张海鹏,陈猛,白帅,等.层布式混杂纤维混凝土抗压及抗拉性能试验研究[J].水利与建筑工程学报,2015,13(05):131-135.
[18]Qian C X,Stroeven P.Fracture properties of concrete reinforced with steel-polypropylene hybrid fibers[J].Cement and Concrete Composites,2000,22(5):343-351.