欧洲混凝土早期性能监测装置比较

Comparison of Devices for Monitoring the Properties of Concrete at Early Ages in Europe

混凝土早期性能的研究范围除了确定凝结时间、测定自收缩外,还有进行机械加载时监测弹性模量的变化、监测徐变和松弛等。对于前者,国内学者设计了各种装置并取得了较好的效果,但是对于后者国内文献很少涉及。国外的各类监测装置比较全面地记录了早期混凝土性能,并实现了自动及连续监测的目的。介绍了欧洲监测混凝土早期性能的5种不同装置,并对其用途、特性及优缺点进行了比较。

In the early age concrete properties research, in addition to determining the setting time and measuring the autogenous shrinkage, it is necessary to monitor the E-modulus, creep and relaxation with cyclic loadings. For the former, Chinese researchers have designed a variety of devices with good measurement results. However, for the latter, it is rarely reported in Chinese literature. Various types of devices in Europe, with automatic protocols and continuous digital acquisition, can monitor the properties of concrete at early ages in a more comprehensive way. This article describes five different devices in monitoring the properties of concrete at early ages, and their usage. Basic properties, advantages and disadvantages are compared.