不同组合玄武岩纤维再生砂浆强度试验研究
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摘要
在胶凝体和骨料中同时掺入粉煤灰和再生细骨料配制基准再生砂浆,并对再生砂浆改变玄武岩纤维长度和掺率,分析其对再生砂浆基本性能的影响,其结果为:随着玄武岩纤维长度和掺率的增加再生砂浆稠度有降低趋势,抗压强度有了明显的提高,其中L_(12)F_(15)组的抗压强度提高幅度最大。并且经抗折试验表明短切纤维对再生砂浆抗折强度提高效果高于长纤维,玄武岩纤维的高掺率对再生砂浆抗折强度提高效果高于低掺率。
In this experiment,fly ash and recycled fine aggregate were added into the cementite and aggregate to prepare the datum recycled mortar,and the length and rate of basalt fiber were changed. The effect of the modified mortar on the basic properties of the recycled mortar was analyzed. The results are as follows:with the increase of basalt fiber length and mixing rate,the thickness of the recycled mortar has decreased,and the compressive strength has been significantly improved. Among them,the compressive strength of the L12 F15 group has increased the most.The results show that the high rate of addition of basalt fiber is higher than the low rate of addition.
In this experiment,fly ash and recycled fine aggregate were added into the cementite and aggregate to prepare the datum recycled mortar,and the length and rate of basalt fiber were changed. The effect of the modified mortar on the basic properties of the recycled mortar was analyzed. The results are as follows:with the increase of basalt fiber length and mixing rate,the thickness of the recycled mortar has decreased,and the compressive strength has been significantly improved. Among them,the compressive strength of the L12 F15 group has increased the most.The results show that the high rate of addition of basalt fiber is higher than the low rate of addition.
引文
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[2] AYUB T,SHAFIQ N,NURUDDIN M F. Mechanical properties ofhigh-performance concrete reinforced with basalt fibers[J].Procedia Engineering,2014(77):131-139.
[3]叶邦土,蒋金洋.玄武岩纤维及其增强水泥基材料的研究进展[J].材料导报A(综述篇),2013,27(10):102-108.
[4] Ayub T,Shafiq N,Nuruddin M F. Effect of chopped basalt fibers on the mechanical properties and microstructure of high performance fiberreinforced concrete[J]. Advances in Materials Science and Engineering,2014(7):1-14.
[5] Jiang C H,Fan K,Wu F,et al. Experimental study on the mechanical properties and microstructure of chopped basaltfibre reinforced concrete[J]. Materials and Design,2014(58):187-193.
[6]张兰芳,尹玉龙.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.
[7]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(S1):99-102,114.