目录
混凝土与制品
首页

BFRP筋与薄层混凝土粘结性能研究

作者：陈国新，王欣，万朝阳，王康

关键字：BFRP,筋,与,薄层,混凝土,粘结,性能,研究,新疆,

　
（新疆农业大学 水利与土木工程学院，新疆 乌鲁木齐  830052）
    摘要：研究覆膜蒸养后玄武岩纤维增强塑料BFRP（Basalt Fiber Reinforced Polymer）筋与夹芯保温墙板保护层混凝土的粘结性能，采用正交试验方法，考虑混凝土强度、保护层厚度及粘结长度3因素在不同水平下的影响，将BFRP筋混凝土试件蒸养8 h后再各标养3 d及28 d，对其进行中心拉拔试验，研究粘结强度随影响因素变化的规律，采用多元线性回归法对BFRP筋混凝土试件3 d及28 d粘结强度进行回归。结果表明：粘结长度是影响试件粘结强度最显著的因素，混凝土强度次之，保护层厚度影响较小，且3 d和28 d变化规律一致；试验的最佳组合是混凝土强度等级为C30，保护层厚度为40 mm，粘结长度为20 mm；回归公式为不同混凝土强度、保护层厚度和粘结长度下试件不同龄期的粘结强度值提供理论参考。
    关键词：覆膜蒸养；BFRP筋；混凝土强度；保护层厚度；粘结长度；粘结强度
    中图分类号：TU528.7        文献标识码：A        文章编号：1001-702X（2019）09-0070-04
 
Study on bond performance between BFRP bars and thin-lift concrete
CHEN Guoxin，WANG Xin，WAN Chaoyang，WANG Kang
（School of Water Conservancy and Civil Engineering，Xinjiang Agricultural University，Urumqi 830052，China）
    Abstract：In order to study the bond properties of BFRP Bars and insulation wall panel protective layer concrete after plastic film steaming，the design method of orthogonal experiment was adopted，considering the influence of three factors which was concrete strength，protective layer thickness and bond length under different levels. BFRP bars concrete specimens were steamed for 8 h and then were cured in standard for 3 d and 28 d respectively，and then the center pulling out experiment was tested. The change rule of bond strength with influencing factors was studied，and multiple linear regression method was used to regress the bond strength of BFRP reinforced concrete specimens for 3 d and 28 d respectively. The results show that the bond length is the most significant factor influencing the bond strength of specimens，and the strength of concrete takes second place，the thickness of protective layer is even less，and the variation rule of 3 d and 28 d is consistent. The optimum combination of the bond strength was that the strength grade of concrete was C30，the concrete cover thickness was 40 mm，and the bond length was 20 mm. The regression formula provides the theoretical basis for the bond strength of different concrete strength，protective layer thickness and bond length of specimens in varied ages.
    Key words：plastic film steaming，BFRP bars，concrete strength，protective layer thickness，bond length，bond strength