ABSTRACT

This study investigates the method of ultrasonic pulse velocity technique as a non-destructive test for concrete to estimate the mechanical properties of RPC, modified reactive powders concrete (MRPC). This study is based on data obtained from the experimental investigation done in this work and comparison with the data of previous works. After conducting pulse velocity tests on cubic samples, the relationship between pulse velocity, elastic modulus and compressive strength of samples was obtained with an acceptable approximation. Also, the validity of the proposed relation ACI 363.1 and four distinguished researchers regarding the calculation of RPC, MRPC elastic modulus and its comparison with the dynamic elasticity modulus (ASTM C 597) with respect to different materials and mix designs. The dynamic modulus of elasticity (Ed) increased on average by 19% over the modulus of elasticity (Ec). Given the lack of research on the relationship between the parameters mentioned in the MRPC, the present study is an exploratory research concerned with the relationship of these methods. Also, two new models are presented for relating these parameters.

摘要

本研究探讨了超声波脉冲速度技术作为混凝土无损检测的方法，以评估 RPC、改性活性粉末混凝土 (MRPC) 的力学性能。本研究基于从本工作中进行的实验调查获得的数据，并与以前的工作数据进行比较。在对立方体样品进行脉冲速度测试后，获得了样品的脉冲速度、弹性模量和抗压强度之间的关系，具有可接受的近似值。此外，建议的关系 ACI 363.1 和四位杰出的研究人员在计算 RPC、MRPC 弹性模量及其与不同材料和混合设计的动态弹性模量 (ASTM C 597) 的比较方面的有效性。动态弹性模量 (Ed) 比弹性模量 (Ec) 平均增加 19%。鉴于缺乏对MRPC中提到的参数之间关系的研究，本研究是一个探索性研究，关注这些方法之间的关系。此外，还提出了两个用于关联这些参数的新模型。