油菜秸秆灰分混凝土与钢筋之间粘结性能研究  

Bond Behavior Between Rape Straw Ash Concrete and Steel Bar

作　　者：易督航 刘保华[1,2] 曾哲[1] 易恋[1] 周雲 黄伟[1] 

机构地区：[1]湖南农业大学工学院,长沙4101282 [2]湖南省现代农业装备工程技术研究中心,长沙410128

出　　处：《中国农学通报》2017年第13期146-151,共6页Chinese Agricultural Science Bulletin

基　　金：湖南省政府重大专项"湖南双季稻区油菜早熟品种选育和机械化生产技术研究与生产示范机械化生产部分"(湘府阅[2014]35号);湖南省研究生科研创新项目"移栽油菜成孔器成孔机理及装备研究"(CX201613286);湖南省科技厅平台建设项目"湖南省现代农业装备工程技术研究中心"(湘财教指[2014]10号)

摘　　要：为了探究油菜秸秆灰分的掺入对钢筋-混凝土之间粘结性能的影响。对3种不同油菜秸秆灰分掺量的钢筋-油菜秸秆灰分混凝土试件进行中心拉拔试验,并与钢筋-普通混凝土粘结性能作对比试验。结果表明:钢筋-油菜秸秆灰分混凝土粘结强度与混凝土抗压强度呈正相关。当水胶比一定时,随着油菜秸秆灰分掺量的增加,钢筋-油菜秸秆灰分混凝土的粘结强度降低。水胶比为0.47时的钢筋-油菜秸秆灰分粘结性能与普通混凝土最为接近,为最优配合比。由试验结果可知,在承重要求较低的普通钢筋混凝土结构中,采用适量油菜秸秆灰分等量替代水泥,对于节省水泥生产能源和科学合理利用农业废弃物两方面均具有重要意义。The paper aims to explore influences of bond behavior between steel bar and concrete mixed with rape straw ashes. To do this, a center pull-out test on 3 test-pieces of steel bars and rape straw ashes concrete with 3 different amounts of rape straw ashes was conducted, and the corresponding bond behaviors were compared at the same time. The results showed that a positive correlation between steel bars and rape straw ashes concrete and the compression strength of concrete; when the water-binder ratio was constant, the bond behavior of steel bars and rape straw ashes concrete decreased with the increase of rape straw ashes amount; the water-binder ratio of 0.47 could make the bond behavior between steel bars and rape straw ashes nearly the same with that of plain concrete, which was the optimal mix ratio. Therefore, by replacing cement with the right and equal amount of rape straw ashes in the ordinary reinforced concrete with lower bearing requirements, energy can be saved in cement production and agriculture wastes can be used rationally and scientifically.

关 键 词：油菜秸秆灰分 粘结强度 粘结-滑移曲线 中心拉拔试验 变形钢筋 

分 类 号：TU528.041[建筑科学—建筑技术科学]