江市特大桥箱梁混凝土早期力学性能实验研究

摘要

混凝土的力学性能直接影响桥梁结构的安全和工作性能，有必要对其进行现场测试研究。根据标准试验方法，分别测定了江市特大桥箱梁混凝土的抗压强度、回弹值、弹性模量等早期物理力学性能参数，得出了现场养护和标准养护两种条件下混凝土的力学性能发展规律，建立了江市特大桥箱梁混凝土专用测强曲线，确定了混凝土随龄期增长变化的物理力学参数发展模式，并对现场施工提出了若干建议，对施工具有指导意义。%Mechanical properties of concrete directly affect the performance of the bridge struc-ture.According to the standard test method,the physical and mechanical parameters of the early-age concrete,including the concrete rebounding value,compressing strength and elastic modulus,which was used in the box girder of the Jiangshi bridge,were measured,The law of mechanical properties develop-ment of the concrete under site curing and standard curing was obtained,and a dedicated concrete strength curve was established for Jiangshi bridge.The development model of physical and mechanical parameters of concrete with the age growth was also established.