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Probabilistic Method and its Application for Evaluating Carbonation Life of New-Built Concrete Structures

机译：概率方法及其评价新建混凝土结构碳化寿命的应用

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In order to evaluate carbonation life of new-built concrete structures, two kinds of nondestructive methods have been adopted to test the thickness of concrete cover and ultrasonic velocity of new-built structures. Simultaneously a probabilistic method was proposed based on the relationship between accelerated carbonation rate and ultrasonic velocity. This proposed method has been applied to evaluate the carbonation related lives of two new-built tunnels. The results indicate that even at the nearly same environmental and CO_2 combining condition, there exists a big difference in probabilistic carbonation lives between two tunnels i.e. the probabilistic lives of Tunnel A and Tunnel B are 94.0% and 82.3% and the corresponding maximum discrepancies are 11.6% and 27.0%, respectively. Thus it can be concluded that the scattered quality of concrete cover is attributed to the difference in construction technique, which eventually leads to the diversity in evaluated probabilistic carbonation life of two tunnels.
机译：为了评估新建混凝土结构的碳化寿命，采用了两种无损方法来测试新建结构的混凝土覆盖厚度和超声波速度。同时提出了基于加速碳化速率和超声速度之间的关系的概率方法。该提出的方法已应用于评估两个新建隧道的碳酸化相关的生命。结果表明，即使在几乎相同的环境和CO_2组合条件下，两个隧道之间的概率碳化生命差异也存在很大差异，即隧道A和隧道B的概率寿命为94.0％和82.3％，并且相应的最大差异是11.6 ％和27.0％。因此，可以得出结论，混凝土覆盖的散射质量归因于施工技术的差异，最终导致两个隧道的评估概率碳化寿命的多样性。

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