Evaluation of field applicability of microwave-based rapid water content measurement method in recycled aggregate production facilities

Min Seok Oh; Ji Hye Lee; Kyung Suk Yoo

doi:10.22702/jkai.2025.15.1.4

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2025 Vol.15, Issue 1 Preview Page Next Page

Scientific Paper

Evaluation of field applicability of microwave-based rapid water content measurement method in recycled aggregate production facilities 전자레인지를 이용한 급속 함수비 측정방법의 순환골재 생산시설 현장 적용성 평가

4 July 2025. pp. 29-37

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Abstract

With the increasing demand for recycled aggregates, intermediate treatment facilities that process construction waste are experiencing frequent screen clogging issues due to excessive moisture content in soil-rich raw materials. To address this, the present study evaluated the accuracy and reliability of the microwave oven drying method (ASTM D4643) for rapid water content determination, using the standard oven drying method (KS F 2306) as a reference. A total of 50 samples were tested under both laboratory (24 samples) and field (26 samples) conditions, and the deviations between the two methods were analyzed. Based on the correlation analysis of the experimental data, an empirical relationship was derived, and subsequent validation confirmed that the predicted and measured values lie within the 90% confidence interval. The rapid moisture-content test using a microwave oven requires less than six minutes, thereby shortening the testing time dramatically compared with KS F 2306, which takes 18-24 hours. Moreover, provided that electrical power is available, the microwave method can be performed immediately on site.

Keywords

Water Content

Field Applicability

ASTM D4643

KS F 2306

References

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Information

Publisher :KOREAN ASPHALT INSTITUTE
Publisher(Ko) :한국아스팔트학회
Journal Title :Journal of the Korean Asphalt Institute
Journal Title(Ko) :한국아스팔트학회지
Volume : 15
No :1
Pages :29-37
Received Date : 2025-06-13
Revised Date : 2025-06-23
Accepted Date : 2025-06-29
DOI :https://doi.org/10.22702/jkai.2025.15.1.4

Journal of the Korean Asphalt Institute ISSN:2234-0785(Print) 2635-9553(Online) 한국아스팔트학회지

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