摘要
为研究蒸压轻质混凝土(ALC)板专用砂浆的早期抗剪黏结性能,设计并制作了4组专用砂浆黏结Z型试件和1组普通砂浆黏结Z型试件,通过对试件进行单面剪切试验,分析了普通砂浆黏结试件和不同养护龄期下专用砂浆黏结试件的抗剪强度、破坏形式和荷载-滑移曲线等抗剪黏结性能指标,并采用ABAQUS软件建立了专用砂浆黏结试件受剪有限元模型。研究结果表明:专用砂浆的早期黏结强度较高且发展较快,养护1 d后的抗剪强度是同强度等级普通砂浆养护28 d后的3.5倍;随着养护龄期的增加,专用砂浆黏结面的剪切刚度和极限滑移量均有小幅度增长,相较于普通砂浆,专用砂浆的塑性变形能力和试块-砂浆界面的黏结强度均有所提高;有限元计算的荷载-滑移曲线以及破坏特征与试验结果吻合较好,验证了牵引力-分离定律模拟专用砂浆黏结行为的有效性和可靠性。
In order to study the early-age shear bond performance of special mortar for autoclaved lightweight concrete(ALC)panel,four groups of special mortar bonded Z-shaped specimens and one group of ordinary mortar bonded Z-shaped specimens were designed and fabricated.Through single-sided shear tests on these specimens,the shear bond strength,failure characteristics and load-slip curves of ordinary mortar bonded specimens and special mortar bonded specimens under different curing ages were analyzed,Additionally,a shear finite element model of special mortar bonded specimens was established by ABAQUS software.The results show that the early-age bond strength of special mortar is higher and develops more rapidly.After 1 d of curing,the shear bond strength of special mortar is 3.5 times higher than that of ordinary mortar of the same strength grade after 28 d of curing.With the increase of curing age,the shear stiffness and ultimate slip of the bond surface of special mortar increase slightly.Compared with the ordinary mortar,the plastic deformation capacity and the bond strength of the test block-mortar interface of special mortar are significantly improved.The load-slip curve and failure characteristics calculated by finite element are in good agreement with the test results,which verifies the effectiveness and reliability of the traction-separation law simulation of the bond behavior of special mortar.
作者
欧阳德光
朱利平
郭旭
静行
OUYANG Deguang;ZHU Liping;GUO Xu;JING Hang(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China;China Construction Seventh Engineering Division Co.,Ltd.,Zhengzhou 450004,China)
出处
《硅酸盐通报》
CAS
北大核心
2023年第11期3843-3852,共10页
Bulletin of the Chinese Ceramic Society
基金
中建七局科技研发课题(CSCEC7b-2021-Z-14)。
关键词
ALC板
专用砂浆
早期
抗剪黏结性能
数值模拟
ALC panel
special mortar
early-age
shear bond performance
numerical simulation
