论文部分内容阅读
为防止膨胀混凝土结构在温度及混凝土收缩应力作用下产生裂缝,需掌握膨胀混凝土早期内部应变的变化规律。通过对实际工程膨胀混凝土后浇带进行现场监测,研究了不同位置测点的温度及膨胀剂添加对楼板应变的影响。测试结果表明,在超长结构的楼板内中添加一定比例的UEA膨胀剂,能有效减小结构因材料收缩及温度作用等因素引起的变形,防止混凝土结构开裂;对膨胀混凝土结构的早期应变实时监测的方法,可及时调整养护方案,调节混凝土内部应变变化,达到控制混凝土裂缝产生的目的。
In order to prevent the expansion of concrete structures in the temperature and shrinkage caused by concrete cracks, the need to master the early changes in internal strain of expansive concrete. Through the on-site monitoring of the post-pouring belt of the actual project expansion concrete, the influence of the temperature at different measuring points and the expansion agent on the floor strain was studied. The test results show that adding a certain proportion of UEA expansive agent in the floor of ultra-long structure can effectively reduce the deformation of the structure due to factors such as material shrinkage and temperature, and prevent cracking of the concrete structure. The early strain of the expansive concrete structure real-time Monitoring methods can be timely adjustment of conservation programs to adjust the internal strain of concrete to achieve the purpose of controlling the production of concrete cracks.