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KMID : 1024520120210091059
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Journal of the Environmental Sciences
2012 Volume.21 No. 9 p.1059 ~ p.1068
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Compressive Strength and Construction Characteristics of Environmentally Friendly Soil Concrete Pavement Using Red Mud Admixture
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Hong Chong-Hyun
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Abstract
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The purpose of this study was to develope the environmentally favorable method of roller compacted soil concrete
pavement using industrial waste red mud. Red mud was the major solid waste produced in the process of alumina extraction from bauxite(Bayer process). For recycling purpose, red mud was treated and applied to use as concrete admixtures.
To this end, laboratory test such as compressive strength of soil concrete, and field test such as construction characteristics of soil concrete pavement, had been conducted. From the study results, the compressive strength of soil concrete was strongly related to its matrix proportion and compaction energy. The optimum mix proportion was comprised of cement 300 kg/m3, water 110 kg/m3 , fine aggregate 600 kg/m3, course aggregate 1400 kg/m3, red mud admixture 50 kg/m3 and compaction energy above 2.86 cm-kgf/cm3. The 7th-day and 28th-day mean compressive strength of soil concrete were 43.8 MPa and 53.3 MPa each under the optimum condition. Pavement application of soil concrete using red mud admixture indicated that the proposed method was simple in case of construction and showed a good surface texture.
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KEYWORD
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Compressive strength, Red mud, Roller compacted concrete pavement, Soil concrete
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