Experimental evaluation of concrete shrinkage deformation under the influence of foehn wind in vietnam

Abstract

Foehn wind or foehn effect is a hot dry wind type blowing down from the mountains. It appears in the middle of Vietnam from early April to mid-September every year. The foehn effect has characteristic humidity drops deeply while the temperature rises. This has affected the concrete shrinkage deformation in the work construction. This paper presented an experimental study to evaluate the concrete shrinkage deformation under the influence of the Foehn wind in Vietnam. The experiment was performed in a simulated environment with temperatures high and humidity down, which is intended to simulate the phenomenon of foehn wind and climate change in the middle of Vietnam. The datasets obtained from this experiment were tested with previous results, it was highly accurate and reliable. The research obtained results have reflected that the concrete shrinkage deformation in foehn wind conditions has a significant effect compared to normal conditions in both the value and speed. In addition, this test also shows that the concrete shrinkage deformation with Ca(OH)2 added to in the mixture is smaller than concrete without Ca(OH)2.

The Unprecedented 2023 North China Heatwaves and Their S2S Predictability

“…The warm temperature anomalies that were distributed precisely along the topography further confirm this hypothesis. The critical role of topography in the occurrence of heatwaves has also been emphasized in many previous studies (e.g., González‐Herrero et al., 2022; Ma et al., 2014; Tran et al., 2023; Yoon et al., 2018). In addition to the critical role of circulation, extremely dry soil can also be observed prior to and during heatwaves (Figure S3 in Supporting Information ).…”