当前位置: X-MOL 学术Cem. Concr. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Monitoring early-age acoustic emission of cement paste and fly ash paste
Cement and Concrete Research ( IF 11.4 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.cemconres.2019.105964
Evin Dildar Dzaye , Geert De Schutter , Dimitrios G. Aggelis

Abstract In this study, a combined approach of several monitoring techniques was applied to allow correlations between the AE activity and related processes such as shrinkage and settlement evolution, capillary pressure and temperature development in fresh cementitious media. AE parameters related to frequency, energy, and cumulative activity which exhibit sensitivity to the particle size distribution of cement paste are compared with inert fly ash (FA) leading to isolation of the mechanical sources from the chemical ones. Characterization of the origin of different processes occurring in cement paste during hydration is complex. Although acoustic emission (AE) monitoring has been used before, a qualitative relation between the microstructural formation or other early-age processes and the number or parameters of AE signals has not been established. The high sensitivity of AE enables the recording of elastic waves within the cementitious material, allowing the detection of even low-intensity activities.

中文翻译:

水泥浆和粉煤灰浆早期声发射监测

摘要 在这项研究中,应用了几种监测技术的组合方法,以建立 AE 活动与相关过程(例如新鲜胶凝介质中的收缩和沉降演变、毛细管压力和温度发展)之间的相关性。与频率、能量和累积活性相关的 AE 参数对水泥浆的粒度分布表现出敏感性,将其与惰性飞灰 (FA) 进行比较,从而将机械源与化学源隔离开来。表征水泥浆水化过程中发生的不同过程的起源是复杂的。虽然之前已经使用过声发射 (AE) 监测,微观结构形成或其他早期过程与 AE 信号的数量或参数之间的定性关系尚未建立。AE 的高灵敏度能够记录胶结材料内的弹性波,甚至可以检测到低强度的活动。
更新日期:2020-03-01
down
wechat
bug