We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Setting Time Measurement Using Ultrasonic Wave Reflection.
- Authors
Chul-Woo Chung; Suraneni, Prannoy; Popovics, John S.; Struble, Leslie J.
- Abstract
Ultrasonic shear wave reflection was used to investigate setting times of cement pastes by measuring the reflection coefficient at the interface between hydrating cement pastes of varying watercement ratio (w/c) and an ultrasonic buffer material. Several different buffer materials were employed, and the choice of buffer was seen to strongly affect measurement sensitivity; high-impact polystyrene showed the highest sensitivity to setting processes because it had the lowest acoustic impedance value. The results show that ultrasonic shear-wave reflection can be used successfully to monitor early setting processes of cement paste with good sensitivity when such a low impedance buffer is employed. Criteria are proposed to define set times, and the resulting initial and final set times agreed broadly with those determined using the standard penetration resistance test.
- Subjects
SHEAR waves; MEASUREMENT of ultrasonic waves; CEMENT setting; STIFFNESS (Engineering); REFLECTANCE measurement; ACOUSTIC impedance measurement
- Publication
ACI Materials Journal, 2012, Vol 109, Issue 1, p109
- ISSN
0889-325X
- Publication type
Article
- DOI
10.14359/51683576