Non-destructive evaluation of reclaimed asphalt cement concrete
Non-destructive evaluation of reclaimed asphalt cement concrete
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DOI：
10.1080/19648189.2016.1219877
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发表时间：
2018-01-01
影响因子：
2.1
通讯作者：
Fried, A. N.
中科院分区：
文献类型：
--
作者：
Al-Mufti, R. L.;Fried, A. N.
再生沥青（RA）已越来越多地用作制造中低强度水泥混凝土的替代骨料。本文的目的是利用超声脉冲速度（UPV）研究用RA制成的混凝土的行为和性能。以前大多数使用UPV的调查都是从1- 7天到28天开始的砾石混凝土。在这项研究中，UPV的应用已扩展到水泥混凝土与RA集料制成的非常早的年龄，在这里作为一个时期开始后立即混凝土搅拌和长达28天。一个早期测试系统，连续超声监测新混凝土已被用来评估重要的性能，如早期强度，使用UPV测量。使用不同水/水泥比（0.4 - 0.7）的混凝土混合物。经验模型已经产生了早期RA混凝土的抗压强度和UPV。
Reclaimed asphalt (RA) has been increasingly used as an alternative aggregate in the manufacture of low to medium strength cement concrete. It is the aim here to investigate the behaviour and properties of concrete made with RA, using ultrasonic pulse velocity (UPV). Most previous investigations using UPV have been into gravel concrete starting between 1-7days and up to 28days. In this research, the application of UPV has been extended to cement concrete made with RA aggregate at the very early age, taken here as the period starting immediately after concrete mixing and up to 28days. An early age test system for continuous ultrasonic monitoring of fresh concretes has been used to assess important properties, such as early age strength, using UPV measurements. Concrete mixes with different water/cement ratios (.4-.7) were used. Empirical models have been produced relating compressive strength and UPV for early age RA concrete.