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玄武岩纤维增强珊瑚砂砂浆收缩性与力学性能试验研究
作者：贾慧娜1，李亚丽1，贾立文2
[1.商丘工学院 土木工程学院，河南 商丘 476000；
2.中建新疆建工（集团）有限公司，新疆 乌鲁木齐 830054]
2.中建新疆建工（集团）有限公司，新疆 乌鲁木齐 830054]
摘要：针对珊瑚砂砂浆收缩大、力学性能差这2个突出问题，以珊瑚砂砂浆各龄期的收缩率、抗压、抗折和抗拉强度为评价指标，研究玄武岩纤维对珊瑚砂砂浆收缩性能与力学性能的改善作用。试验结果表明：掺加玄武岩纤维可有效减小珊瑚砂砂浆的收缩性，且其收缩率随纤维掺量的增加而减小；玄武岩纤维对珊瑚砂砂浆抗压强度的增强效果不明显，当纤维掺量过高时，对珊瑚砂砂浆各龄期抗压强度产生不利影响；玄武岩纤维可明显提高珊瑚砂砂浆的抗折和抗拉强度，其抗折和抗拉强度均随纤维掺量的增加先提高后降低，最佳掺量为0.90%~1.05%。
关键词：玄武岩纤维；珊瑚砂砂浆；收缩性；力学性能
中图分类号：TU528.572 文献标识码：A 文章编号：1001-702X（2020）12-0068-04
Experimental study on the shrinkage and mechanical properties of basalt fiber reinforced coral mortar
JIA Huina1，LI Yali1，JIA Liwen2
（1．School of Civil Engineering，Shangqiu Institute of Technology，Shangqiu 476000，China；
2．CSCEC Xinjiang Construction Engineering Group Co. Ltd.，Urumqi 830054，China）
Abstract：The shrinkage and mechanical properties of coral mortar modified by basalt fiber are studied for the reason of the large shrinkage and poor mechanical characteristics of coral mortar. The improvement effects of basalt fiber on the shrinkage and mechanical properties of coral mortar are evaluated systematically by these indexes including the shrinkage ratio，the compressive，flexural and tensile strengths at various curing periods. The results show that the addition of basalt fiber can effectively reduce the shrinkage value of coral mortar，and the shrinkage ratio decreases with the increase of fiber content. The improvement effect of basalt fiber on the compressive strength of coral mortar is not obvious. When the fiber content is too high，it has a negative effect on the compressive strength of coral mortar at all ages. The flexural and tensile strengths of coral mortar can be greatly enhanced，owing to the addition of basalt Fiber. The flexural and tensile strengths of coral mortar increases first and then decreases with the increase of fiber content，and the optimum content is 0.90%~1.05%.
Key words：basalt fiber，coral mortar，shrinkage，mechanical property