Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey

Research Article

Examining Mechanical Properties of Recycled Aggregate Concrete

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  • @INPROCEEDINGS{10.4108/eai.7-9-2021.2314894,
        author={Ali Alsalman and Jamal Khudair and Rahman S. Kareem and Lateef Assi and Canh N Dang and Jos\^{e} R. Mart\^{\i}-Vargas},
        title={Examining Mechanical Properties of Recycled Aggregate Concrete},
        proceedings={Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey},
        publisher={EAI},
        proceedings_a={IMDC-IST},
        year={2022},
        month={1},
        keywords={sustainable construction; recycled concrete aggregate; recycled aggregate concrete; compressive strength; modulus of elasticity; shrinkage; co2 emission},
        doi={10.4108/eai.7-9-2021.2314894}
    }
    
  • Ali Alsalman
    Jamal Khudair
    Rahman S. Kareem
    Lateef Assi
    Canh N Dang
    José R. Martí-Vargas
    Year: 2022
    Examining Mechanical Properties of Recycled Aggregate Concrete
    IMDC-IST
    EAI
    DOI: 10.4108/eai.7-9-2021.2314894
Ali Alsalman1,*, Jamal Khudair2, Rahman S. Kareem3, Lateef Assi4, Canh N Dang5, José R. Martí-Vargas6
  • 1: Tatum-Smith-Welcher Engineers, Inc., 3100 S Market St., Rogers, AR 72758, USA & College of Engineering, Civil Engineering Department, Al Maaqal University, Basra, Iraq
  • 2: College of Engineering, Civil Engineering Department, University of Basra, Basra, Iraq
  • 3: University of Arkansas, Department of Civil Engineering, 4190 Bell Engineering Center Fayetteville, AR 72701, USA
  • 4: Department of Civil and Environmental Engineering, University of South Carolina, Columbia, USA
  • 5: Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
  • 6: Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam5 Institute of Concrete Science and Technology (ICITECH), Universitat Politecnica de Valencia, Valencia, Spain
*Contact email: alialsalman609@gmail.com

Abstract

This study develops several mid-strengths recycled aggregate concrete (RAC) mixtures. The experimental part examines three groups. The first group, natural aggregate concrete (NAC) mixtures, used 100% natural gravel aggregate. The second group (RAC-I) used a combination of natural gravel aggregate and recycled concrete aggregate (30% per total weight of coarse aggregates). The parent concrete had a compressive strength of 20-30 MPa. The third group (RAC-II) had a similar and higher percentage of recycled concrete aggregate replacement of 30%, 50%, and 100%. The reference concrete had a compressive strength of 30-40 MPa. The results revealed that the 30% substitution of recycled concrete aggregate had minimal effect on the concrete workability and mechanical properties. The shrinkage of RAC-I mixtures at an age of 112 days, is 40% higher than that of NAC mixtures. The analysis of emission indicates that RCA can be a suitable option to reduce CO2 emission.