Title:
Contactless System for Continuous Monitoring of Early-Age Concrete Properties
Author(s):
Hajin Choi, Homin Song, Quang N.V. Tran, Jeffery R. Roesler, and John S. Popovics
Publication:
Concrete International
Volume:
38
Issue:
9
Appears on pages(s):
35-41
Keywords:
mortar, wave, sensor, surface
DOI:
Date:
9/1/2016
Abstract:
In this article, the authors discuss a technology they are developing for practical and low-cost monitoring of early-age concrete as it transitions from a fluid-like material to a solid. The system uses an air-coupled ultrasonic transmitter to induce a Rayleigh wave that propagates along the concrete surface. The wave ���leaks” energy into the air that can be detected by an air-coupled sensor. The technology shows promise for estimating stiffening, and it potentially could be used to ensure proper timing of final finishing and sawcutting activities.