Page 10 - Open-Access-Jan-2022

TECHNICAL PAPER

workability was satisfying using the same admixture levels [6] Kandasami, S. (2019). “Sustainable construction:
for the recycled aggregate concrete as for the reference. responsible use of materials”, The Indian Concrete
Regarding the 28 days compressive strength, no loss in Journal, Vol. 93, No. 3, pp. 9-13.
strength was observed. The L&T site managers concluded
that the RCA can easily replace crushed stone sand in greater [7] Wang, B., Yan, L.B., Fu, Q.N. and Kasal, B. (2021).
proportions to those currently permitted in IS383. The logistics “A comprehensive review on recycled aggregate and
with partial replacement for M20 did not cause any significant recycled aggregate concrete”, Resources Conservation
challenges apart from implementing increased control on WA and Recycling, Vol. 171, No. 105565, pp. 1-29.
and the particle grading. Moreover, the price of the RCA was
competitive even with significant longer transport distance than [8] Safiuddin, M., Alengaram, U.J., Rahman, M.M., Salam,
the CSS aggregates. Hence, there is a potential for significant M.A. and Jumaat, M.Z. (2013). “Use of recycled concrete
cost savings in the Mumbai Metropolitan Region. aggregate in concrete: A review”, Journal of Civil
Engineering and Management, Vol.19, No. 6, pp. 796-810.
ACKNOWLEDGEMENTS
[9] Tam, V.W.Y., Wattage, H., Le, K.N., Buteraa, A. and
The authors gratefully thank Mr. M. V. Satish, Whole Time Soomro, M. (2021a). “Methods to improve microstructural
Director & Senior Executive Vice President (Buildings) and Mr. properties of recycled concrete aggregate: A critical
K. Senou, Head, Technical Services, of the Buildings & Factories review”, Construction and Building Materials, Vol. 270,
Independent Company of L&T Construction for their steadfast No. 121490, pp. 1-12.
support to this initiative. Furthermore, sincere thanks to the
dedicated project site team of L&T Construction led by Mr. R. [10] Tam, V.W.Y., Soomro, M. and Evangelista, A.C.J. (2021b).
Karunanithi and Mr. G. Sakthivel; kindly facilitated by Mr. Amit “Quality improvement of recycled concrete aggregate
Barde with the complete support of Mr. O. V. Divakaran, Task by removal of residual mortar: A comprehensive review
Force Leader, CIDCO Project and Mr. G. Vasantha Kumar, Head, of approaches adopted”, Construction and Building
Precast Factory. The authors are also grateful for the technical Materials, Vol. 288, No. 123066, pp. 1-22.
assistance from the Indo-Norwegian Project on C&D Waste
supported by the Royal Norwegian Embassy in New Delhi. [11] Sosa, M.E., Zaccardi, Y.A.V. and Zega, C.J. (2021).
“A critical review of the resulting effective water-to-cement
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