Journal of Material Cycles and Waste Management

, Volume 20, Issue 1, pp 469–480 | Cite as

Studies on thermo-chemical treatment of recycled concrete fine aggregates for use in concrete

  • G. Santha Kumar
  • A. K. Minocha


The presence of cement paste is the most important factor affecting the quality of recycled concrete fine aggregates. This study aims to develop the thermo-chemical treatment for the purpose of removal of the cement paste adhering to recycled concrete fine aggregates. This study involves assessing the effectiveness of thermo-chemical treatment and comparing its efficiency with thermal and chemical treatments. The results of the investigation elucidate the influence of these treatments on the performances of recycled concrete fine aggregates as well as influence of using treated and untreated recycled concrete fine aggregates on the characteristics of concrete. The results revealed that the thermo-chemical treatment experiences the satisfactory performances in improving the quality of recycled concrete fine aggregates and such treated recycled concrete fine aggregates used in concrete contribute to considerable improvement in strength characteristics.


Thermo-chemical treatment Recycled concrete fine aggregates Cement paste Recycled fine aggregate concrete Microstructure 



Recycled concrete aggregates


Recycled concrete coarse aggregates


Recycled concrete fine aggregates


Adhered mortar


Cement paste


Hydrochloric acid


Natural fine aggregates


Natural coarse aggregates




Interfacial transition zone



The paper is published with kind permission of the Director, CSIR-CBRI, Roorkee, and it forms a part of a Supra Institutional Project of CSIR R&D program (Govt. of India) under 12th 5-year plan. The authors are grateful to Prof. S.K. Bhattacharyya, Former Director, CSIR, Central Building Research Instititute, Roorkee, India, for constructive comments throughout the research work. Authors are also thankful to Ms. Monalisa Behera, Mr. Maiti S, and all our institute staffs for their help during research work.


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Copyright information

© Springer Japan 2017

Authors and Affiliations

  1. 1.Environmental Science and Technology GroupCSIR-Central Building Research InstituteRoorkeeIndia

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