摘要
以磷酸镁水泥砂浆3 d、7 d和28 d的抗压、抗折和拉伸黏结强度为评判指标,研究了玄武岩纤维对磷酸镁水泥砂浆力学性能的影响,建立了声波纵波脉冲速度与抗压强度的理论关系式。结果表明,掺量不超过2 kg/m^3的玄武岩短切纤维有助于提高砂浆的抗压强度;短切玄武岩纤维的掺入可以显著增强砂浆的抗折强度,建议掺量为3~5.5 kg/m^3;砂浆的拉伸黏结强度会随纤维掺量的增加而提高,建议掺量为5~6 kg/m^3;纵波波速可以用于测定磷酸镁水泥修补砂浆的抗压强度。
Based on the 3 d,7 d,and 28 d compressive strength,flexural strength,and tensile bond strength of magnesium phosphate cement mortar(MPCRM),the enhancement effects of basalt fiber on mechanical properties of MPCRM were studied,and the theoretical relationship between the pulse velocity of sonic longitudinal wave and compressive strength was established.The results show that the short cut basalt fiber with the content of less than 2 kg/m^3 is helpful to improve the compressive strength of MPCRM.The addition of short cut basalt fiber can significantly enhance the flexural strength of the mortar,and the recommended content is 3~5.5 kg/m^3.The tensile bond strength of the mortar increases with the increase of the fiber content,and the recommended content is 5~6 kg/m^3.The longitudinal wave velocity can be used to determine the compressive strength of magnesium phosphate cement repair mortar.
作者
刘雪敏
申选召
贾慧娜
LIU Xue-min;SHEN Xuan-zhao;JIA Hui-na(College of Information&Business,Zhongyuan University of Technology,Zhengzhou 451191,China;Department of Civil Engineering,Henan University of Engineering,Zhengzhou 451191,China;School of Civil Engineering,Shangqiu Institute of Technology,476000,China)
出处
《混凝土与水泥制品》
北大核心
2020年第6期49-52,56,共5页
China Concrete and Cement Products
基金
河南省科技攻关项目(192102310510)。
关键词
磷酸镁水泥
玄武岩纤维
修补砂浆
力学性能
Magnesium phosphate cement
Basalt fibre
Repaired mortar
Mechanical property