Abstract
The durability of concrete pavement to freeze/thaw cycles is mainly dependent on the air void system. Air entraining admixtures are used to provide a beneficial air void system. Large entrapped air voids reduce strength and make it insufficient to simply characterize the porosity by the air content; void spacing and specific surface parameters are also important. Ability to perform quality assurance testing - nondestructive evaluation - of concrete pavement soon after placement is highly desirable. Thus, laboratory experiments have been conducted to investigate Rayleigh surface waves for characterization of porosity in fresh concrete. A mediator mounted onto a Plexiglas wedge is used to introduce waves from an ultrasonic transducer onto the surface of the concrete. The challenges are that fresh concrete is highly attenuative and that the material properties evolve as the concrete sets. Rayleigh wave speed is shown to be sensitive to porosity by simple micromechanical modeling, and results are presented for normal concrete with large aggregate, sieved concrete, and mortar. Wave speeds are significantly less (10-22% depending on time after placement) for concrete with approximately 5% porosity relative to concrete with no air entrainment admixture.
| Original language | English (US) |
|---|---|
| Title of host publication | Health Monitoring of Structural and Biological Systems 2010 |
| Edition | PART 1 |
| DOIs | |
| State | Published - Jun 18 2010 |
| Event | Health Monitoring of Structural and Biological Systems 2010 - San Diego, CA, United States Duration: Mar 8 2010 → Mar 11 2010 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Number | PART 1 |
| Volume | 7650 |
| ISSN (Print) | 0277-786X |
Other
| Other | Health Monitoring of Structural and Biological Systems 2010 |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 3/8/10 → 3/11/10 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
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Rayleigh surface waves for characterization of the air void system in fresh concrete. / Lissenden, III, Clifford Jesse; Then, Ronald B.; Li, Sheng; Xiao, Chao; Lopez De Murphy, Maria; Rose, Joseph Lawrence.
Health Monitoring of Structural and Biological Systems 2010. PART 1. ed. 2010. 76500V (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7650, No. PART 1).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Rayleigh surface waves for characterization of the air void system in fresh concrete
AU - Lissenden, III, Clifford Jesse
AU - Then, Ronald B.
AU - Li, Sheng
AU - Xiao, Chao
AU - Lopez De Murphy, Maria
AU - Rose, Joseph Lawrence
PY - 2010/6/18
Y1 - 2010/6/18
N2 - The durability of concrete pavement to freeze/thaw cycles is mainly dependent on the air void system. Air entraining admixtures are used to provide a beneficial air void system. Large entrapped air voids reduce strength and make it insufficient to simply characterize the porosity by the air content; void spacing and specific surface parameters are also important. Ability to perform quality assurance testing - nondestructive evaluation - of concrete pavement soon after placement is highly desirable. Thus, laboratory experiments have been conducted to investigate Rayleigh surface waves for characterization of porosity in fresh concrete. A mediator mounted onto a Plexiglas wedge is used to introduce waves from an ultrasonic transducer onto the surface of the concrete. The challenges are that fresh concrete is highly attenuative and that the material properties evolve as the concrete sets. Rayleigh wave speed is shown to be sensitive to porosity by simple micromechanical modeling, and results are presented for normal concrete with large aggregate, sieved concrete, and mortar. Wave speeds are significantly less (10-22% depending on time after placement) for concrete with approximately 5% porosity relative to concrete with no air entrainment admixture.
AB - The durability of concrete pavement to freeze/thaw cycles is mainly dependent on the air void system. Air entraining admixtures are used to provide a beneficial air void system. Large entrapped air voids reduce strength and make it insufficient to simply characterize the porosity by the air content; void spacing and specific surface parameters are also important. Ability to perform quality assurance testing - nondestructive evaluation - of concrete pavement soon after placement is highly desirable. Thus, laboratory experiments have been conducted to investigate Rayleigh surface waves for characterization of porosity in fresh concrete. A mediator mounted onto a Plexiglas wedge is used to introduce waves from an ultrasonic transducer onto the surface of the concrete. The challenges are that fresh concrete is highly attenuative and that the material properties evolve as the concrete sets. Rayleigh wave speed is shown to be sensitive to porosity by simple micromechanical modeling, and results are presented for normal concrete with large aggregate, sieved concrete, and mortar. Wave speeds are significantly less (10-22% depending on time after placement) for concrete with approximately 5% porosity relative to concrete with no air entrainment admixture.
UR - http://www.scopus.com/inward/record.url?scp=77953487568&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953487568&partnerID=8YFLogxK
U2 - 10.1117/12.847684
DO - 10.1117/12.847684
M3 - Conference contribution
AN - SCOPUS:77953487568
SN - 9780819480651
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Health Monitoring of Structural and Biological Systems 2010
ER -