沙漠砂混凝土与钢筋黏结性能试验研究  

Experimental study on bonding performance between desert sand concrete and reinforcement

作　　者：秦拥军[1] 陈奇 毕钰 李向阳[1] QIN Yongjun;CHEN Qi;BI Yu;LI Xiangyang(School of Civil Engineering and Architecture,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047

出　　处：《混凝土》2024年第2期73-77,82,共6页Concrete

基　　金：国家自然科学基金(51668060);新疆维吾尔自治区研究生科研创新计划项目(XJ2019G066)。

摘　　要：在我国西部沙漠砂资源丰富的背景下,探究沙漠砂对钢筋与混凝土黏结性能的影响,制作中心拉拔试验,通过对不同沙漠砂取代率和不同粉煤灰掺量下的钢筋与混凝土的黏结强度进行试验研究。根据黏结滑移曲线,分析沙漠砂取代率和粉煤灰掺量对钢筋和混凝土黏结强度、极限位移、破坏模式的影响。研究结果表明:直径16 mm钢筋混凝土试件在锚固长度较短导致脆性劈裂破坏的情况下,钢筋与混凝土的黏结强度随沙漠砂取代率的增加呈先上升后下降的趋势;粉煤灰掺量为20%时,对两者的黏结强度提升最大。Under the background of abundant desert sand resources in western China,the influence of desert sand on the bonding performance of steel and concrete was explored,and the central pull-out test was made to study the bond strength of steel and concrete under different desert sand replacement rates and different fly ash contents.According to the bond-slip curve,the effects of desert sand replacement rate and fly ash content on the bond strength,ultimate displacement and failure mode of steel and concrete were analyzed.The results show that the bond strength of steel and concrete increases first and then decreases with the increase of desert sand replacement rate under the condition of brittle splitting failure caused by short anchorage length of 16 mm reinforced concrete specimen.When the fly ash content is 20%,the bond strength of the two increases the most.

关 键 词：沙漠砂混凝土 粉煤灰 中心拉拔试验 黏结强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]