Ultrasonic wave dispersion and attenuation in fresh mortar

被引：60

作者：

Aggelis, DG

Philippidis, TP

机构：

[1] Univ Patras, Dept Aeronaut & Mech Engn, Patras 26504, Greece

[2] FORTH, Inst Chem Engn & High Temp Chem Process, GR-26500 Patras, Greece

来源：

NDT & E INTERNATIONAL | 2004年 / 37卷 / 08期

关键词：

fresh concrete; ultrasound; velocity; dispersion; attenuation;

D O I：

10.1016/j.ndteint.2004.04.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Results from an experimental study of ultrasonic, through-transmission, wave propagation on fresh cementitious material are discussed in this paper. The propagation characteristics of different frequency tone-bursts revealed the strong dispersive behavior of this type of materials while using sine-sweep excitation, the attenuation up to about 1 MHz was examined. Sand content and size exercise significant influence on wave parameters while entrapped air bubbles seem to dominate the attenuation at low frequencies since cement paste specimens, containing no sand, exhibit strong attenuation. The possibility of mortar composition characterization within 10 min after mixing is also addressed leading to encouraging results. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：617 / 631

页数：15

共 26 条

[1]

Aggelis D. G., 2000, P FIST HELL C CONCR, P49

[2] Nondestructive measurement of concrete strength gain by an ultrasonic wave reflection method [J].