聚丙烯纤维增强珊瑚混凝土抗冲击性能试验研究
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摘要
为增强低强度珊瑚混凝土的抗冲击荷载性能,进行了聚丙烯纤维增强0. 33、0. 4和0. 47三种水灰比的珊瑚混凝土抗冲击性能试验研究。结果表明:掺加聚丙烯纤维可以有效地降低珊瑚混凝土的脆性,延缓冲击裂缝的形成和开展;进而增强珊瑚混凝土的抗冲击性能。在一定范围内,随着聚丙烯纤维掺量的增加,初裂冲击次数和破坏冲击次数均呈递增趋势,珊瑚混凝土初裂和破坏时吸收的能量逐渐增大。过多的聚丙烯纤维在珊瑚混凝土基体中不易均匀分散;并使界面过渡区孔隙率与缺陷增多,增强效果逐渐降低。
In order to enhance the shock load resistance of low-strength coral concrete,the shock resistance performance of coral concrete with three water-cement ratios of 0. 33,0. 4 and 0. 47 was studied. The results showed that the addition of polypropylene fiber can effectively decrease the brittleness of coral concrete,delay the formation and development of shock crack,and then improve the shock resistance of coral concrete; within a certain range,with the increasing of the polypropylene fiber content,the number of initial cracking shocks and the number of damage shocks are increasing; the energy absorbed by coral concrete during initial cracking and failure increases gradually. Excessive polypropylene fibers are not easily dispersed uniformly in the coral concrete matrix,and the porosity and defects in the interface transition zone are increased,the enhancement effect is gradually reduced.
In order to enhance the shock load resistance of low-strength coral concrete,the shock resistance performance of coral concrete with three water-cement ratios of 0. 33,0. 4 and 0. 47 was studied. The results showed that the addition of polypropylene fiber can effectively decrease the brittleness of coral concrete,delay the formation and development of shock crack,and then improve the shock resistance of coral concrete; within a certain range,with the increasing of the polypropylene fiber content,the number of initial cracking shocks and the number of damage shocks are increasing; the energy absorbed by coral concrete during initial cracking and failure increases gradually. Excessive polypropylene fibers are not easily dispersed uniformly in the coral concrete matrix,and the porosity and defects in the interface transition zone are increased,the enhancement effect is gradually reduced.
引文
1王磊,赵艳林,吕海波.珊瑚骨料混凝土的基础性能及研究应用前景[J].混凝土,2012(2):99-113Wang Lei,Zhao Yanlin,LüHaibo. Prospect on the properties and application situation of coral aggregate concrete[J]. Concrete,2012(2):99-113
2 潘柏州,韦灼彬.原材料对珊瑚砂混凝土抗压强度影响的试验研究[J].工程力学,2015,32(1):221-225Pan Baizhou,Wei Zhuobin. Experimental study on effects to coral sand concrete compressive strength of raw materials[J]. Engineering Mechanics,2015,32(1):221-225
3 Arumugam R A,Ramamurthy K. Study of compressive strength characteristics of coral aggregate concrete[J]. Magazine of Concrete Research,1996,48(176):141-148
4 李林.珊瑚混凝土的基本特性研究[D].南宁:广西大学,2012Li Lin. Research on basic characteristics of coral concrete[D]. Nanning:Guangxi University,2012
5 关国英,赵文杰.纤维增强水泥基复合材料的研究进展[J].硅酸盐通报,2017,36(10):3342-3346Guan Guoying,Zhao Wenjie. Research development of fiber reinforced cementitious materials[J]. Bulletin of the Chinese Ceramic Society,2017,36(10):3342-3346
6 王磊,易金,邓雪莲,等.纤维增强珊瑚混凝土的力学性能研究及破坏形态分析[J].河南理工大学学报(自然科学版),2016,35(5):713-718Wang Lei,Yi Jin,Deng Xuelian,et al. Study on mechanical property and damage morphology analysis of coral aggregate concrete with fiber[J]. Journal of Henan Polytechnic University(Natural Science),2016,35(5):713-718
7 华渊,刘荣华.纤维增韧高性能混凝土的试验研究[J].混凝土与水泥制品,1998(3):40-43Hua Yuan,Liu Ronghua. Experimental study on fiber reinforced high performance concrete[J]. China Concrete and Cement Products,1998(3):40-43
8 Nataraja M C,Nagaraj T S,Basavaraja S B. Reproportioning of steel fibre reinforced concrete mixes and their impact resistance[J]. Cement and Concrete Research,2005,35(12):2350-2359
9 杨成忠,刘新荣,李虹,等.掺加聚丙烯纤维对路面混凝土抗冲击韧性的影响[J].重庆建筑大学学报,2008,30(6):42-45Yang Chengzhong,Liu Xinrong,Li Hong,et al. Adding polypropylene fiber to pavement concrete and its influence on shock resistance toughness[J]. Journal of Chongqing Jianzhu University,2008,30(6):42-45
10 陈相宇.纤维混凝土抗冲击性能的试验研究[D].大连:大连理工大学,2010Chen Xiangyu. Experimental research on impact resistance of fibre reinforced concrete[D]. Dalian:Dalian University of Technology,2010
11 许金余,李为民,王亚军,等.玄武岩纤维对不同胶凝材料混凝土的强韧化效应[J].解放军理工大学学报:自然科学版,2011,12(3):245-250Xu Jinyu,Li Weimin,Wang Yajun,et al. Effect of short basalt fiber on enhancement of strength and ductility for concretes with different binder materials[J]. Journal of PLA University of Science and Technology:Natural Science,2011,12(3):245-250
12 李宇峙.工程质量监理[M].北京:人民交通出版社,1999Li Yuzhi. Engineering quality supervision[M]. Beijing:China Communication Press,1999
2 潘柏州,韦灼彬.原材料对珊瑚砂混凝土抗压强度影响的试验研究[J].工程力学,2015,32(1):221-225Pan Baizhou,Wei Zhuobin. Experimental study on effects to coral sand concrete compressive strength of raw materials[J]. Engineering Mechanics,2015,32(1):221-225
3 Arumugam R A,Ramamurthy K. Study of compressive strength characteristics of coral aggregate concrete[J]. Magazine of Concrete Research,1996,48(176):141-148
4 李林.珊瑚混凝土的基本特性研究[D].南宁:广西大学,2012Li Lin. Research on basic characteristics of coral concrete[D]. Nanning:Guangxi University,2012
5 关国英,赵文杰.纤维增强水泥基复合材料的研究进展[J].硅酸盐通报,2017,36(10):3342-3346Guan Guoying,Zhao Wenjie. Research development of fiber reinforced cementitious materials[J]. Bulletin of the Chinese Ceramic Society,2017,36(10):3342-3346
6 王磊,易金,邓雪莲,等.纤维增强珊瑚混凝土的力学性能研究及破坏形态分析[J].河南理工大学学报(自然科学版),2016,35(5):713-718Wang Lei,Yi Jin,Deng Xuelian,et al. Study on mechanical property and damage morphology analysis of coral aggregate concrete with fiber[J]. Journal of Henan Polytechnic University(Natural Science),2016,35(5):713-718
7 华渊,刘荣华.纤维增韧高性能混凝土的试验研究[J].混凝土与水泥制品,1998(3):40-43Hua Yuan,Liu Ronghua. Experimental study on fiber reinforced high performance concrete[J]. China Concrete and Cement Products,1998(3):40-43
8 Nataraja M C,Nagaraj T S,Basavaraja S B. Reproportioning of steel fibre reinforced concrete mixes and their impact resistance[J]. Cement and Concrete Research,2005,35(12):2350-2359
9 杨成忠,刘新荣,李虹,等.掺加聚丙烯纤维对路面混凝土抗冲击韧性的影响[J].重庆建筑大学学报,2008,30(6):42-45Yang Chengzhong,Liu Xinrong,Li Hong,et al. Adding polypropylene fiber to pavement concrete and its influence on shock resistance toughness[J]. Journal of Chongqing Jianzhu University,2008,30(6):42-45
10 陈相宇.纤维混凝土抗冲击性能的试验研究[D].大连:大连理工大学,2010Chen Xiangyu. Experimental research on impact resistance of fibre reinforced concrete[D]. Dalian:Dalian University of Technology,2010
11 许金余,李为民,王亚军,等.玄武岩纤维对不同胶凝材料混凝土的强韧化效应[J].解放军理工大学学报:自然科学版,2011,12(3):245-250Xu Jinyu,Li Weimin,Wang Yajun,et al. Effect of short basalt fiber on enhancement of strength and ductility for concretes with different binder materials[J]. Journal of PLA University of Science and Technology:Natural Science,2011,12(3):245-250
12 李宇峙.工程质量监理[M].北京:人民交通出版社,1999Li Yuzhi. Engineering quality supervision[M]. Beijing:China Communication Press,1999