玄武岩纤维掺杂混凝土材料特性的研究
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摘要
玄武岩纤维能有效改善混凝土材料的性能,但其对混凝土性能的影响规律业界还存在一定分歧.以抗压和抗折强度作为力学指标,以抗氯离子渗透性能和早期收缩应变作为耐久性指标,探究不同玄武岩纤维掺量和规格对混凝土强度与耐久性的影响规律,分析短切玄武岩纤维掺杂混凝土材料的各项性能.研究结果表明,短切玄武岩纤维对混凝土抗压强度的提高不明显,但对抗折强度则随掺量的增加提高显著;纤维的体积分数为0. 12%时,混凝土抗折强度提高约25%;长度较长及长径比较大的玄武岩纤维对混凝土抗折强度有更好的提高效果.玄武岩纤维的掺入会使混凝土抗渗性能略有下降,但也能有效降低混凝土的收缩应变,掺入玄武岩纤维后,混凝土28 d收缩应变降低约15%.
Basalt fiber can effectively improve property of concrete material. However,there are some divergences for its effects on concrete property. Therefore,in this paper,the effects of various fiber contents and sizes on concrete strength and durability are investigated,and properties of chopped basalt fiber doped concrete materials are characterized. In the research,compressive strength and flexural strength are used as mechanical indexes,while resistance to chloride-ion penetration and early-age shrinkage are used as durability indexes. Results show that although the contribution of short-cut basalt fiber to compressive strength of concrete is not obvious,flexural strength of concrete increases significantly with the increase of the fiber content. When the volume fraction of basalt fiber reaches0. 12%,the flexural sstrength of concrete increases by about 25%. The basalt fiber with longer length and largerlength/diameter ratio has better effect on the flexural strength of concrete. The addition of basalt fiber will make the concrete coagulate,thus the impermeability of concrete decreases slightly,but it can effectively reduce the shrinkage strain of concrete. By adding basalt fiber,shrinkage strain of concrete decreases by about 15% in 28 days.
Basalt fiber can effectively improve property of concrete material. However,there are some divergences for its effects on concrete property. Therefore,in this paper,the effects of various fiber contents and sizes on concrete strength and durability are investigated,and properties of chopped basalt fiber doped concrete materials are characterized. In the research,compressive strength and flexural strength are used as mechanical indexes,while resistance to chloride-ion penetration and early-age shrinkage are used as durability indexes. Results show that although the contribution of short-cut basalt fiber to compressive strength of concrete is not obvious,flexural strength of concrete increases significantly with the increase of the fiber content. When the volume fraction of basalt fiber reaches0. 12%,the flexural sstrength of concrete increases by about 25%. The basalt fiber with longer length and largerlength/diameter ratio has better effect on the flexural strength of concrete. The addition of basalt fiber will make the concrete coagulate,thus the impermeability of concrete decreases slightly,but it can effectively reduce the shrinkage strain of concrete. By adding basalt fiber,shrinkage strain of concrete decreases by about 15% in 28 days.
引文
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[14]RYBIN V A,UTKIN A V,BAKLANOVA N I. Alkali resistance,microstructural and mechanical performance of zirconia-coated basalt fibers[J]. Cement and Concrete Research,2013,53(2):1-8.
[15]MEHTA P K,MONTEIRO P J M. Concrete:microstructure,properties and materials[M]. New York,USA:MeGraw Hill,2005.
[16]胡瑾,阎培渝,董树国,等.提高中等强度等级混凝土抗氯离子渗透性能的研究[J].硅酸盐通报,2014,33(4):913-917.HU Jin,YAN Peiyu,DONG Shuguo,et al. Research on the improvement of resistence chloride ion permeability of concrete with medium strength grade[J]. Bulletin of the Chinese Ceramic Society,2014,33(4):913-917.(in Chinese)
[2]张兰芳,尹玉龙,刘晶伟,等.玄武岩纤维增强混凝土力学性能的研究[J].硅酸盐通报,2014,33(11):2834-2837.ZHANG Lanfang, YIN Yulong, LIU Jingwei, et al.Mechanical properties study on basalt fiber reinforced concrete[J]. Bulletin of the Chinese Ceramic Society,2014,33(11):2834-2837.(in Chinese)
[3]吴江,李玉香,陈雅斓,等.短切玄武岩纤维增强混凝土力学性能试验研究[J].混凝土,2014(10):99-102.WU Jiang,LI Yuxiang,CHEN Yalan,et al. Study on the mechanical behavior of chopped basalt fiber reinforced concrete[J]. Concrete,2014(10):99-102.(in Chinese)
[4]王钧,马跃,张野,等.短切玄武岩纤维混凝土力学性能试验与分析[J].工程力学,2014,31(6):99-102.WANG Jun,MA Yue,ZHANG Ye,et al. Experimental research and analysis on mechanical properties of chopped basalt fiber reinforced concrete[J]. Engineering Mechanics,2014,31(6):99-102.(in Chinese)
[5]成涛华,李玉香.玄武岩纤维增强混凝土力学性能研究[J].混凝土与水泥制品,2017(1):53-56.CHENG Taohua, LI Yuxiang. Study on basalt fiber brought improvements of concrete mechanical properties[J]. China Concrete and Cement Products,2017(1):53-56.(in Chinese)
[6]李为民,许金余,沈刘军,等.玄武岩纤维混凝土的动态力学性能[J].复合材料学报,2008,25(4):135-142.LI Weimin,XU Jinyu,SHEN Liujun,et al. Dynamic mechanical properties of basalt fiber reinforced concrete using a split hopkinson pressure bar[J]. Acta Materiae Compositae Sinica,2008,25(4):135-142.(in Chinese)
[7]张向冈,秦文博,田琦,等.玄武岩纤维混凝土材料性能研究进展[J].混凝土,2018(2):94-97.ZHANG Xianggang, QIN Wenbo, TIAN Qi, et al.Research progress of the material properties on basalt fiber reinforced concrete[J]. Concrete,2018(2):94-97.(in Chinese)
[8]王海良,袁磊,宋浩.短切玄武岩纤维混凝土力学性能试验研究[J].建筑结构,2013,43(10):562-564.WANG Hailiang,YUAN Lei,SONG Hao. Experimental study on mechanical property of chopped basalt fiber reinforced concrete[J]. Building Structure,2013,43(10):562-564.(in Chinese)
[9] AYBU T,SHAFIQ N,NURUDDIN M F. Mechanical properties of high-performance concrete reinforced with basalt fibers[J]. Procedia Engineering,2014(77):131-139.
[10]杨启斌,陈峰.玄武岩纤维高性能混凝土抗渗性能试验[J].土木工程与管理学报,2017,34(2):95-98.YANG Qibin, CHEN Feng. Experiments on high performance basalt fiber concrete impermeability[J].Journal of Civil Engineering and Management,2017,34(2):95-98.(in Chinese)
[11]HUANG Qi,SHI Xiaoshuang,WANG Qingyuan,et al.The influence of fiber on the resistance to chloride-ion penetration of concrete under the environment of carbonation[C]//International Conference on Material Science and Applications. Paris,France:Atlantis Press,2015:223-228.
[12]薛启超,张井财,何健,等.玄武岩纤维混凝土断裂性能试验研究[J].哈尔滨工程大学学报,2016,37(8):1027-1033.XUE Qichao,ZHANG Jingcai,HE Jian,et al. Experimental study of fracture properties for basalt-fiberreinforced concrete[J]. Journal of Harbin Engineering University,2016,37(8):1027-1033.(in Chinese)
[13]王新忠,李传习,凌锦育,等.玄武岩纤维混凝土早期裂缝试验研究[J].硅酸盐通报,2017,36(11):3860-3866.WANG Xinzhong,LI Chuanxi,LING Jinyu,et al. Experimental study on early crack of basalt fiber reinforced concrete[J]. Bulletin of the Chinese Ceramic Society,2017,36(11):3860-3866.
[14]RYBIN V A,UTKIN A V,BAKLANOVA N I. Alkali resistance,microstructural and mechanical performance of zirconia-coated basalt fibers[J]. Cement and Concrete Research,2013,53(2):1-8.
[15]MEHTA P K,MONTEIRO P J M. Concrete:microstructure,properties and materials[M]. New York,USA:MeGraw Hill,2005.
[16]胡瑾,阎培渝,董树国,等.提高中等强度等级混凝土抗氯离子渗透性能的研究[J].硅酸盐通报,2014,33(4):913-917.HU Jin,YAN Peiyu,DONG Shuguo,et al. Research on the improvement of resistence chloride ion permeability of concrete with medium strength grade[J]. Bulletin of the Chinese Ceramic Society,2014,33(4):913-917.(in Chinese)