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首页> 外文期刊>Journal of Infrastructure Systems >Nondestructive Testing And Evaluation Of Concrete parking Garages
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Nondestructive Testing And Evaluation Of Concrete parking Garages

机译：混凝土停车库的无损检测与评估

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Public works departments need test procedures for assessing the current condition of concrete in public facilities such as parking garages. Nondestructive testing can provide ultrasonic pulse velocities that can be used as an indicator of concrete quality. A procedure is presented that can be used to collect and analyze ultrasonic measurements. The procedure was applied for all of the public garages in Montgomery County, Md., to identify garages that needed immediate maintenance. Based on the measured data, the effect of the age of the concrete on the pulse velocity was investigated and a model was developed. The model can be used to determine where a garage is in its life cycle. The effect of elastomeric membranes, used to protect the concrete slabs on pulse velocities, was evaluated with the results indicating that the use of membranes extended the life of the concrete by about 10%, or an equivalent of 3 years of design life. A method of evaluating the effect of steel reinforcement on the pulse velocity was developed and applied. The method can be used to identify the optimum spacing between the transmitter and receiver in nondestructive testing.
机译：公共工程部门需要测试程序，以评估停车场等公共设施中混凝土的现状。无损检测可以提供超声波脉冲速度，可以用作混凝土质量的指标。提出了可用于收集和分析超声测量值的程序。该程序已应用于马里兰州蒙哥马利县的所有公共车库，以识别需要立即维护的车库。根据实测数据，研究了混凝土龄期对脉冲速度的影响，并建立了模型。该模型可用于确定车库在其生命周期中的位置。评估了用于保护混凝土板的弹性膜对脉冲速度的影响，结果表明，使用膜可将混凝土的寿命延长约10％，或相当于3年的设计寿命。开发并应用了一种评估钢筋对脉冲速度影响的方法。该方法可用于在无损检测中确定发射器和接收器之间的最佳间隔。

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