Experimental studies on behaviors of reinforced concrete column structures made of recycled aggregates under concentric loads

  • Nguyen Thanh Quang Viet Nam Paper Corporation, 25A Ly Thuong Kiet street, Hai Ba Trung district, Hanoi, Vietnam
  • Tran Viet Cuong Innovative Solid Waste Solutions (Waso), Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Nguyen Ngoc Tan Innovative Solid Waste Solutions (Waso), Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Nghiem Ha Tan Innovative Solid Waste Solutions (Waso), Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Ken Kawamoto Graduate School of Science and Engineering, Saitama University, Japan
  • Nguyen Hoang Giang Innovative Solid Waste Solutions (Waso), Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
Keywords: recycled aggregate concrete, natural aggregate concrete, construction and demolition waste, square columns, concentric load

Abstract

The paper presents experimental results and structural analysis of reinforced concrete (RC) columns made of recycled aggregate concrete (RAC) and natural aggregate concrete (NAC) under concentric compressive load. The ratio of recycled aggregates in mixture (i.e, replacement ratio, r in %) was 0, 50, and 100% by mass, where r = 0% corresponding to NAC. The load and deformation curves including cracking load, ultimate load, crack width, and compressive strain of the tested columns, were analyzed to determine the effects of replacement ratio of recycled aggregate on the behaviors of square column structures. The results show that the increase of r reduced the load-carrying capacity of RC columns under the concentric compressive load. Horizontal and vertical cracks also were observed immediately for tested columns with high r. The effect of r of RAC on the mechanical behaviros, however, became relatively small and did not affect the behaviors of RAC columns, indicating that the RAC tested in this study was feasible for use in recycled concrete structures.

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Published
28-04-2022
How to Cite
Quang, N. T., Cuong, T. V., Tan, N. N., Tan, N. H., Kawamoto, K., & Giang, N. H. (2022). Experimental studies on behaviors of reinforced concrete column structures made of recycled aggregates under concentric loads. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 16(2), 1-11. https://doi.org/10.31814/stce.huce(nuce)2022-16(2)-01
Section
Research Papers