Effect of temperature on nondestructive measurements for air permeability and water sorptivity of cover concrete
Effect of temperature on nondestructive measurements for air permeability and water sorptivity of cover concrete
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DOI：
10.1016/j.conbuildmat.2022.127361
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发表时间：
2022-06
影响因子：
7.4
通讯作者：
M. H. Nguyen;S. Nishio;K. Nakarai
中科院分区：
文献类型：
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作者：
M. H. Nguyen;S. Nishio;K. Nakarai
温度对保护层混凝土传输性能的影响是现场测量调整的关键。研究了储藏室温度对透气性和吸水率测量的影响。在恒定相对湿度(60%RH)的4种温度条件(5、20、30和35°C)下，对11个试件进行了研究，这些试件使用两种水泥、5种水灰比和4个养护周期。采用急流透气法、地表水吸水法和有意喷水试验三种无损检测方法，对土壤透气性和吸水率的变化进行了监测。随着温度的升高，透气性和吸水率增加。这种增加主要可以通过温度变化下粘度、表面张力和表面水分含量的相应变化来解释。随后，确定并讨论了三种无损检测方法的适用性以及在温度变化下获得的结果之间的强正相关关系。
The influence of temperature on the transport properties of cover concrete is crucial for adjustingin situmeasurements. This study investigated the effects of storage room temperature on air permeability and water sorptivity measurements. Four temperature conditions (5, 20, 30, and 35 °C) with constant relative humidity (60%RH) were applied to 11 specimens produced using two types of cement, five water-to-cement ratios, and four curing periods. Three nondestructive methods, namely the Torrent air permeability, surface water absorption, and water intentional spraying tests, were used to monitor the air permeability and water sorptivity changes. With an increase in the temperature, an increase in air permeability and water sorptivity was observed. This increase could primarily be explained by the corresponding changes in the viscosity, surface tension, and surface moisture content under temperature changes. Subsequently, the applicability of three nondestructive methods and strong positive relationships between the obtained results under temperature changes were determined and discussed.