Browse > Article
http://dx.doi.org/10.14190/JRCR.2022.10.4.475

Evaluation on Long-term Mechanical Performance and Durability of Recycled Coarse Aggregate Concrete Produced by Two-stage Mixing Approach  

Seong-Uk, Heo (Divisiont of Architectural and Fire Protection Engineering, Pukyong National University)
Jeong Jin, Son (Divisiont of Architectural and Fire Protection Engineering, Pukyong National University)
Chul-Woo, Chung (Department of ArchitecturalEngineering Pukyong National University)
Young Chan, Kim (Department of ArchitecturalEngineering Pukyong National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.4, 2022 , pp. 475-481 More about this Journal
Abstract
Recycled aggregates show high water absorption rate compared to natural aggregates due to microcrack developed during production process and adhered cement pastes at the surface of recycled aggregates. This leads to the deterioration of mechanical properties and slow work flow. Currently it is getting hard to satisfy high demand for natural aggregates. Utilizing recycled aggregate more widely may be a substitutable countermeasure for the shortage of natural resources. In this study, two-stage mixing approach(TSMA) suggested by Tam et al. is used to produce recycled aggregate concrete(RAC) with 100 % replacement of coarse natural aggregate and tests for compressive strength, elastic modulus, and chloride ion diffusion coefficient are conducted to find out the effect of TSMA compared to normal mixing method. According to experimental result compressive strength and elastic modulus of RAC with TSMA was superior to those of RAC with normal mixing irrespective of water-cement ratio, and in some cases mechanical properties of RAC with TSMA approached to those of natural aggregate concrete(NAC). However, chloride ion diffusion coefficient of RAC was higher than that of NAC. This illustrates that TSMA is not an appropriate method in reducing chloride ion diffusion coefficient, resulting in inconsequential contribution of TSMA to the durability of RAC.
Keywords
Recycled coarse aggregate; Two-stage mixing approach; Compressive strength; Modulus of elasticity; Durability; Chloride ion diffusion coefficient;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Sim, H.S., Park, C.W., Park, S.J., Kim, H.J., Kim, T.G., Lim, C.H. (2006). Development of Recycling & Practical Using for Value Added Resourcing of the Recycled Aggregate Obtained from Waste-Concrete, The Final Report of Hanyang University's Industrial-Academic Cooperation Group [in Korean].
2 Tam, V.W.Y., Gao, X.F., Tam, C.M. (2005). Microstructural analysis of recycled aggregate concrete produced from two-stage mixing approach, Cement and Concrete Research, 35(6), 1195-1203.   DOI
3 Tam, V.W.Y., Gao, X.F., Tam, C.M. (2006). Comparing performance of modified two-stage mixing approach for producing recycled aggregate concrete, Magazine of Concrete Research, 58(7), 477-484.   DOI
4 Tam, V.W.Y., Tam, C.M. (2007). Assessment of durability of recycled aggregate concrete produced by two-stage mixing approach, Journal of Materials Science, 42(10), 3592-3602.   DOI
5 Tam, V.W.Y., Tam, C.M. (2008). Diversifying two-stage mixing approach(TSMA) for recycled aggregate concrete: TSMAs and TSMAsc, Construction and Building Materials, 22(10), 2068-2077.   DOI
6 Tam, V.W.Y., Tam, C.M., Wang, Y. (2007). Optimization on proportion for recycled aggregate in concrete using tow-stage mixing approach, Construction and Building Materials, 21(10), 1928-1939.    DOI
7 Kisku, N., Rajhans, P., Panda, S.K., Pandey, V., Nayak, S. (2020). Microstructural investigation of recycled aggregate concrete produced by adopting equal mortar volume method along with two stage mixing approach, Structures, 24, 742-753.   DOI
8 Korea Institute of Construction Technology(KICT). (2014). Study on Activation Measure of Recycled Aggregate, Report No. 11-161300-000638-01, Ministry of Land, Infrastructure and Transport, Goyang, Gyeonggido, 3-34 [in Korean].
9 Kwon, K.C. (2006). Revision details of laws and enforcement ordinance and regulations on recycling promotion of construction wastes, Magazine of RCR, 2(2), 13-17 [in Korean].
10 Nordtest. (1999). Concrete, Mortar and Cement Based Repair Materials: Chloride Migration Coefficient from Non-Steady-State Migration Experiments, NT BUILD 492, Nordtest.
11 Park, S.H., Choi, J.H., Lee, C.Y., Koo, M.S., Chung, C.W. (2022). Investigation on fire resistance of h igh-performance cement motar with recycled fine aggregate mixed by two-stage mixing approach, Journal of the Korean Recycled Construction Resources Institute, 10(1), 23-29 [in Koreans].
12 American Society for Testing and Materials C 192. (2020). Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory, West Conshohocken; ASTM International.
13 Jeong J.D., Lee D.H. (2008). A study for improvement of testing methods for quality control of recycled aggregate, Journal of the Korea Institute of Building Construction, 8(4), 105-114 [In Korean].   DOI
14 American Society for Testing and Materials C 469. (2020). Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete In Compression, West Conshohocken; ASTM International.
15 Choi, H.B. (2015). Water absorbtion controlling type surface treatment method for quality enhancement of recycled aggregate, Journal of the Korea Institute of Building Construction, 15(6), 561-567 [in Korean].   DOI
16 Choi, W.Y. (2019). Quality standards for republic of Korea and foreign replacement aggregates, Magazine of RCR, 14(2), 77-83 [in Korean].   DOI
17 Kim, J.M., Kang, K.W. (2020). The current status and countermeasures on the supply and demand of aggregate, Magazine of the Korea Concrete Institute, 32(4), 14-20 [in Korean].
18 Kim, N.W., Kim, H.J., Bae, J.S. (2008). A study on the property estimation of recycled coarse aggregate and characteristic of recycled aggregate concrete using the surface coated treatment method, KSCE Journal of Civil and Environmental Engineering Research, 28(4A), 603-609 [in Korean].
19 Kim, Y.J., Kim, G.W., Chung, C.W. (2020). Contribution of two-stage mixing approach on compressive strength of mortar made of recycled fine aggregate, Journal of the Korean Recycled Construction Resources Institute, 8(4), 490-497 [in Korean].