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Quality control for coal combustion products in South Korea through assessed pozzolanic-activity index with long-term property tests

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Abstract

In South Korea, nine million tons of fly ash (FA) are annually produced and approximately 70 % is reutilized for industrial demand. For the prompt reuse and insufficient reclamation site, quality control of FA which is main productive construction material from coal ash is very important. Assessed Pozzolanic-activity Index (API) test which needs only 2 days for evaluation of pozzolanic reaction is currently considered as an alternative of activity index measurement. This paper aims for an applicability of API test for prompt quality control and investigation of domestic FA properties. For the work, FAs from two different power plant types are prepared, and quality tests are carried out based on Korean Standards (KS) methods and API method. Lots of test results are compared with those from API and K-value test for FA with age of 7 days–1 year. From the test results for FA aged 1 year, API results are evaluated to be closely related with those from activity index and K-value, and the correlations are improved with increasing ages regardless of plant types. The applicability of API test is verified and the reduced period of FA quality evaluation can accelerate prompt use and the related process of FA.

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Acknowledgments

This work was supported by the Nuclear Research and Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy. (No. 20111010100030). The authors also appreciate for the support by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No.2015R1A5A1037548).

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Authors and Affiliations

  1. Department of Civil Engineering, Woosuk university, Jincheon, Jeonbuk, 27841, South Korea

    Sung-Won Yoo

  2. Korea Conformity Laboratories, Gasandong, Seoul, 08503, South Korea

    Young Keun Cho & Sang-Hwa Jung

  3. Department of Civil and Environmental Engineering, Sungkyunkwan University, Suwon, 16419, South Korea

    Kwang-Myung Lee

  4. Department Civil and Environmental Engineering, Hannam University, Daejeon, 34430, South Korea

    Seung-Jun Kwon

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  1. Sung-Won Yoo
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  2. Young Keun Cho
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Correspondence to Seung-Jun Kwon.

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Yoo, SW., Cho, Y.K., Jung, SH. et al. Quality control for coal combustion products in South Korea through assessed pozzolanic-activity index with long-term property tests. J Mater Cycles Waste Manag 19, 694–711 (2017). https://doi.org/10.1007/s10163-016-0465-4

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  • DOI: https://doi.org/10.1007/s10163-016-0465-4

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