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The Optimum Production Method for Quality Improvement of Recycled Aggregates Using Sulfuric Acid and the Abrasion Method

Author

Listed:
  • Haseog Kim

    (Building and Urban Research Institute, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Korea)

  • Sangki Park

    (Building and Urban Research Institute, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Korea)

  • Hayong Kim

    (Department of Civil & Environmental Engineering, Kongju National University, 1223-24, Cheonan-daero, Seobuk-gu, Cheonan-si 31080, Korea)

Abstract

There has been increased deconstruction and demolition of reinforced concrete structures due to the aging of the structures and redevelopment of urban areas resulting in the generation of massive amounts of construction. The production volume of waste concrete is projected to increase rapidly over 100 million tons by 2020. However, due to the high cement paste content, recycled aggregates have low density and high absorption ratio. They are mostly used for land reclamation purposes with low added value instead of multiple approaches. This study was performed to determine an effective method to remove cement paste from recycled aggregates by using the abrasion and substituting the process water with acidic water. The aim of this study is to analyze the quality of the recycled fine aggregates produced by a complex method and investigate the optimum manufacturing conditions for recycled fine aggregates based on the design of experiment. The experimental parameters considered were water ratio, coarse aggregate ratio, and abrasion time and, as a result of the experiment, data concerning the properties of recycled sand were obtained. It was found that high-quality recycled fine aggregates can be obtained with 8.57 min of abrasion-crusher time and a recycled coarse aggregate ratio of over 1.5.

Suggested Citation

  • Haseog Kim & Sangki Park & Hayong Kim, 2016. "The Optimum Production Method for Quality Improvement of Recycled Aggregates Using Sulfuric Acid and the Abrasion Method," IJERPH, MDPI, vol. 13(8), pages 1-14, July.
    • Handle: RePEc:gam:jijerp:v:13:y:2016:i:8:p:769-:d:75023
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    References listed on IDEAS

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    1. Tam, Vivian W.Y. & Tam, C.M. & Le, K.N., 2007. "Removal of cement mortar remains from recycled aggregate using pre-soaking approaches," Resources, Conservation & Recycling, Elsevier, vol. 50(1), pages 82-101.
    2. Sangki Park & John van de Lindt & Rakesh Gupta & Daniel Cox, 2012. "Method to determine the locations of tsunami vertical evacuation shelters," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 63(2), pages 891-908, September.
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    Cited by:

    1. Eduardo Kloeckner Sbardelotto & Karyne Ferreira dos Santos & Isabel Milagre Martins & Berenice Martins Toralles & Manuel Gomes Vieira & Catarina Brazão Farinha, 2024. "Influence of Recycling Processes on Properties of Fine Recycled Concrete Aggregates (FRCA): An Overview," Waste, MDPI, vol. 2(2), pages 1-17, April.
    2. Lautaro R. Santillán & Claudio J. Zega & Edgardo F. Irassar, 2024. "Current Knowledge and Pending Research on Sulfate Resistance of Recycled Aggregate Concrete," Sustainability, MDPI, vol. 16(3), pages 1-21, February.

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