Long-term Behaviour of Recycled Coarse Aggregate Concrete with and without Carbonation Treatment
This study presents the results of an experimental research on concrete produced by replacing natural coarse aggregates (NA) with recycled coarse aggregates (RA) generated from construction and demolition waste.The purpose was to determine strength development and creep and shrinkage strains developed in recycled aggregate concrete (RAC).The replacement percentages of NA by RA were 30%, 50%, and 100%.It was also attempted to improve the mechanical properties of RA by carbonation.Natural fine aggregate was used in all mixes.Test variables were replacement percentage and carbonation treatment.Compressive strength was determined at 3, 7, 28, 56, 91, and 180 days, while modulus of elasticity, splitting tensile strength, and Poissons Ratio were determined at 28 days.After the carbonation treatment, the mechanical properties of RA such as density and water absorption improved, but strength of RAC including carbonated RA did not improve.Test results also revealed that the development of shrinkage strain of RAC was similar to NAC, while the creep of RAC was significantly larger than that of NAC.In ease of RAC, there was an increase in the creep strain of maximum 25% and shrinkage strain of maximum 12% when compared to the control concrete.
recycled aggregate recycled aggregate concrete strength creep shrinkage carbonation
Donguk CHOI Gombosuren CHINZORIGT Myung Kwan LIM Hee Seob LIM Odontuya ENKHBOLD Batzaya BAASANKHUU
Dept.of Architectural Engineering, Hankyong National University, Anseong, South Korea Dept.of Architectural Engineering, Songwon University, Gwangju, South Korea Dept.of Architectural Engineering, Hannam University, Daejeon, South Korea School of Civil Engineering and Architecture, MUST, Ulaanbaatar, Mongolia
国际会议
福州
英文
193-198
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）