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http://dx.doi.org/10.14190/JRCR.2022.10.1.101

Estimation Error and Reliability of Measuring Unit Water Content Test Methods for Fresh Concrete Depending on Mix Design Factors at the Laboratory Level  

Park, Min-Yong (Department of Architectural Engineering, Cheong-ju University)
Han, Min-Cheol (Department of Architectural Engineering, Cheong-ju University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.1, 2022 , pp. 101-110 More about this Journal
Abstract
In this study, water content tests were performed on various fresh concretes subjected to different binder compostions to review the estimation errors and reliability of water content test methods. Micro-oven drying method, air-meter method, capacitance method and microwave penetration method were used to estimate water content of fresh concrete. Errors in water content estimation were analyzed by each test method. Regardless of the test method of water content, the estimation error was less than 5 %, and in the case of the test using mortar, the error in the estimation value was relatively large. In addition, based on the test results of water content of various concrete, the probability density function in which the estimation error for each test method becomes the population was analyzed. Water content test methods of fresh concrete which using concrete samples showed high estimate reliability of 97 % within the estimation error range of ± 10 kg/m3. On the other hand, the reliability of water content test method using mortar samples was lower.
Keywords
Unit water content; Microwave oven drying; Air-meter; Capacitance; Microwave penetration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Hong, S.H. (2018). 4th basic plan for safety and maintenance of facilities, Korean Magazine of Construction Engineering and Management, 19(3), 24-31 [in Korean].
2 Min, K.C., Han, C.G. (2016). Influence of low-quality aggregate on engineering properties of concrete, Journal of the Korean Recycled Construction Resources Institute, 4(2), 187-194 [in Korean].   DOI
3 Kim, Y.R., Choi, I.H., Jung, Y.H., Lee, D.B. (2007). An experimental study on the application of measuring method of water content for quality control of concrete, Journal of the Korea Concrete Institute, 19(2), 179-188 [in Korean].   DOI
4 Korea Concrete Institute. (2022). Korean Construction Specification, Ministry of Land, Infrastructure and Transport in Korea, KCS 14 20 10 [in Korean].
5 Kim, Y.R., Jung, Y,H., Choi, I.H., Kim, H.R., Lee, D.B. (2005). Development of measuring method and application status for unit water content of fresh concrete, Magazine of the Korea Concrete Institute, 17(5), 58-64 [in Korean].   DOI
6 An, H.S. (2015). 20 years after sampoong disaster ; do we fully take the responsibilities?, Magazine of the Korea Institute of Building Construction, 15(1), 4-6 [in Korean].
7 Lee, H.S., Lim, S.Y. (2013). A study on activation of long-life housing, Journal of the Korea Institute of Ecological Architecture and Environment, 13(4), 95-102 [in Korean].   DOI
8 Lee, S.J., Song, Y.L., Lee, H.K., Lee, M.H., Han, M.C., Han, C.G. (2015). "Effect of poor quality aggregates on the properties of high strength concrete", Proceedings of the Korean Institute of Building Construction Conference, Seoul, Korea, 15(2), 113-114 [in Korean].
9 Ministry of Land, Infrastructure, Transport and Tourism in Japan. (2003). About Operation for Quality Assurance of Ready-mixed Concrete. Notification, National Building No. 95.
10 Han, M.C., Lee, J.S. (2017). Evaluation of aggregates properties depending on producing sectors and regions in Korea, Journal of the Korea Institute of Building Construction, 17(6), 499-506 [in Korean].   DOI
11 Woo, Y.J., Lee, B.C., Choi, Y.C., Moon, K.D., Jo, Y.K., Kim, J.H., Son, Y.J. (2011). Development of Automatic System for Quality Control in Ready Mixed Concrete Manufacturing, Report No.TRKO201600003723, Korea Conformity Laboratories, Seoul, Korea [in Korean].
12 Ministry of Land, Infrastructure and Transport in Korea. (2022). Construction Work Quality Management Guidelines, Notification, No. 2022-30 [in Korean].