Use of a Moisture Sensor for Monitoring the Effect of Mixing Procedure on Uniformity of Concrete Mixtures
Source abstract
Abstract
The present research is to explore a new approach to monitoring uniformity of concrete mixtures. A given concrete mix was subjected to three different mixing procedures. A moisture sensor was installed inside a pan mixer to monitor moisture content of the concrete mixtures during mixing. The concrete mixtures were considered as uniformly mixed when stable moisture content was detected by the moisture sensor. The concrete workability and strength were then evaluated, and the concrete's microstructure (pore distributions and aggregate-paste interface) was examined. The preliminary results indicated that the moisture sensor provided reliable test results describing moisture distribution in concrete mixtures. The sensor readings well captured the subtle changes, such as the loading sequence of concrete materials, in the concrete mixing process. The material loading sequence, mixing time, and aggregate moisture condition had significant influences on the concrete workability, air void system, and strength. These research results provide researchers and engineers with insight into the control of concrete mixing quality and the optimization of mixing procedures in the lab and field.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete Properties and Behavior · Innovations in Concrete and Construction Materials · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Construction and Environmental Engineering, Iowa State University, USA.
References (22)
Show source-provided references
1. American Concrete Institute (2000). “Guide for Measuring, Mixing, Transporting and Placing Concrete.” ACI 304R-00, Reported by ACI Committee 304, Farmington Hills, Michigan 48333, USA.
2. Assenheim, J. G. (1993). “Moisture measurement in the concrete industry.” Concrete Plant and Production, 14 (5), 129-131.
3. ASTM C94/C94M (2000). “Standard specification for ready-mixed concrete, A1: Concrete uniformity requirements.” West Conshohocken, PA: ASTM.
4. ASTM C143 (2000). “Standard test method for slump of hydraulic cement concrete.” West Conshohocken, PA: ASTM.
5. Board, R., (1997). “On-line moisture measurement by Hydronix.” Canadian Ceramics Quarterly, Canadian Ceramic Society, Willowdale, Canada, May Issue, 99-102.
6. Bois, K., Benally, A. D., Nowak, P. S. and Zoughi, R. (1998). “Cure-state monitoring and water-to-cement ratio determination of fresh portland cement-based materials using near-field microwave techniques.” IEEE Transactions on Instrumentation and Measurement, 47 (3), 628-637.10.1109/19.744313 ↗
7. Boscolo, A., Mangiavacchi, C. and Tuzzi, O. (1993). “Fuzzy sensor data fusion for quality monitoring in concrete mixing plant.” In Conference Record - IEEE Instrumentation and Measurement Technology Conference, 671-674.
8. Chang, P. K. and Peng, Y. N. (2001). “Influence of mixing techniques on properties of high performance concrete.” Cement and Concrete Research, 31 (2), 87-95.10.1016/S0008-8846(00)00439-7 ↗
9. Ferraris, C. F. (2001). “Concrete mixing methods and concrete mixers: state of the art.” Journal of Research of the National Institute of Standards and Technology, 106 (2), 391-399.10.6028/jres.106.016 ↗
10. Khalaf, F. M. and Wilson, J. G. (1999). “Electrical properties of freshly mixed concrete.” Journal of Materials in Civil Engineering, 11 (3), 212-248.
11. Koehler, E. P., Bodenlos, K. D. and Fowler, D. W. (1999). “Development of an energy-based approach to workability characterization.&rdquo
12. In the 12th Annual Symposium Proceedings, International Center for Aggregate Research, Denver, Colorado, April 4-7, 2004.
13. Larrard, F., and Cazacliu, B. (2004). “Why do HPC and SCC require a longer mixing time?” Cement and Concrete Research, 34 (12), 2237-2243.10.1016/j.cemconres.2004.02.012 ↗
14. Mubarak, K., Bois, K. J. and Zoughi, R. (2001). “A simple, robust, and on-site microwave technique for determining water-to-cement ratio (w/c) of fresh portland cement-based materials.” IEEE Transactions on Instrumentation and Measurement, 50 (5), 1255-1263.10.1109/19.963194 ↗
15. Nagi, M. and Whiting, D. (1994). “Determination of water content of fresh concrete using a microwave oven.” Cement, Concrete, and Aggregates, 16 (2), 125-131.10.1520/CCA10290J ↗
16. Naik, T. R. and Ramme, B. W. (1989). “Determination of the water-cement ration of concrete by the buoyancy principle.” ACI Materials Journal, 86 (1), 3-10.
17. National Research Council (Commission on Engineering and Technical Systems), (1997), “Nonconsensual concrete technologies: Renewal of the highway infrastructure.” National Materials Advisory Board, NMAB-484. Washington, D.C.: National Academy Press.
18. Petrou, M. F., Harries, K. A., Gadala-Maria, F. and Kolli, V. G. (2000). “A unique experimental method for monitoring aggregate settlement in concrete.” Cement and Concrete Research, 30 (5), 809-816.10.1016/S0008-8846(00)00223-4 ↗
19. Tattersal, G. H. (1991). “Workability and Quality Control of Concrete.” London: E&FN Spon.10.1201/9781482267006 ↗
20. Wang, K., Schlorholtz, S. M., Hu, J. and Zhang, S. (2005) “Investigation into flow property measurements of low-slump concrete using vibrating slope apparatus.” Journal of ASTM International, 2 (5), Paper ID JAI13054.
21. Williams, D. A., Saak, A. W. and Jennings, H. M. (1999). “Influence of mixing on the rheology of fresh cement paste.” Cement and Concrete Research, 29 (9), 1491-1496.10.1016/S0008-8846(99)00124-6 ↗
22. Zain, M. F. M., Safiuddin, M. and Yusof, K. M. (1999). “Study on the properties of freshly mixed high performance concrete.” Cement and Concrete Research, 29 (9), 1427-1432.10.1016/S0008-8846(99)00108-8 ↗