DESIGN AND CONSTRUCTION OF LOW TRAFFIC VOLUME CONCRETE ROADS USING CONSTRUCTION & DEMOLITION AGGREGATES
Abstract
This paper presents design of low traffic volume concrete roads using C&D aggregates as recycled aggregates (RA) in base/sub-base layer and recycled concrete aggregates (RCA) in pavement quality concrete (PQC) layer. Also, in-situ blended cement with composition (50% OPC-43G cement, 30% Ground granulated blast furnace slag (GGBS) and 20% Flyash) has been used in PQC layer. The study includes testing of C&D aggregates for their suitability in base layer (as RA) and PQC layer (as RCA). It is observed that RA conform to requirements laid by IRC SP-62:2014 for base layer. RCA aggregates were tested for their physical and mechanical properties and concrete mix designs were carried out to with various replacement of natural aggregates with RCA (coarse and fine fraction) at various percentages. Experimental stretches with uniform base using recycled aggregates and PQC Layer with panel size of (1.33 m X 1.25 m) were cast using supplementary cementitious materials (GGBS and flyash with cement) and C&D aggregates (recycled concrete aggregates) at replacement of 75% and 100% to that of natural coarse and fine aggregates. A control stretch with similar base layer and PQC layer with 100% natural aggregates was cast to compare the performance of the experimental stretches. The stretches were analyzed for strain and thermal stresses over a period of 28 days and results were found to be comparable with the control stretch. The study indicated that C&D aggregates can be used as 100% replacement of natural aggregates in base layer (as RA) and PQC Layer (as RCA).
References
2. Gerald T. Coghlan. Opportunities for Low-Volume Roads U.S. Department of Agriculture Forest Service, A5002: Committee on Low-Volume Roads.
3. Leite FDC, Motta RDS, Vasconcelos KL, Bernucci L. Laboratory evaluation of recycled construction and demolition waste for pavements. Construction and Building Materials, 2011 Vol. 25, No. 6, pp. 2972–2979.
4. Zhang J, Gu F, Zhang Y. Use of building-related construction and demolition wastes in highway embankment: laboratory and field evaluations. Journal of Cleaner Production, 2019 Vol. 230, pp. 1051–1060.
5. Ossa A, García JL, Botero E. Use of recycled construction and demolition waste (CDW) aggregates: a sustainable alternative for the pavement construction industry. Journal of Cleaner Production, 2016, Vol. 135, pp. 379–386.
6. Sobhan K, Gonzalez L, Reddy DV. Durability of a pavement foundation made from recycled aggregate concrete subjected to cyclic wet-dry exposure and fatigue loading. Materials and Structures, 2016, Vol. 49, No. 6, pp. 2271–2284.
7. Barbudo A, Agrela F, Ayuso J, Jimenez JR, Poon CS. Statistical analysis of recycled aggregates derived from different sources for sub-base applications. Construction and Building Materials, 2012, Vol. 28, No. 1, pp. 129–138.
8. Perez I, Pasandín AR, Medina L. Hot mix asphalt using C&D waste as coarse aggregates. Materials & Design 2912, Vol. 36, pp. 840–846.
9. Pasandín AR, Perez I. Laboratory evaluation of hot-mix asphalt containing construction and demolition waste. Construction and Building Materials, 2013, Vol. 43, pp. 497–505.
10. Satander K, Use of Construction and Demolition Waste - A Way Forward, Indian Roads Congress Highways 2015, Vol 43, Issue 2.
11. Hazardous Wastes (Management and Handling) Rules, 1989 (as amended, May, 2003).
12. Guidelines for Use of Construction and Demolition Waste in Road Sector, IRC 121: 2017.
13. Ahmed E, Abu El-Maaty Behiry. Utilization of cement treated recycled concrete aggregates as base or subbase layer in Egypt. Ain Shams Engineering Journal, 2013, Vol. 4, pp.661–673.
14. Agrela F, Barbudo A, Ramırez A, Ayuso J, Carvajal MD, Jimenez JR. Construction of road sections using mixed recycled aggregates treated with cement in Malaga, Spain, Resour Conserv Recycl, 2012, Vol. 58, pp.98–110.
15. Rao MC, Bhattacharyya SK, Barai SV. Behavior of recycled aggregate concrete under drop weight impact load, Constr Build Mater 2011; Vol.25, pp 69–80.
16. Papadakis VG, Tsimas S. Supplementary cementing materials in concrete Part I: efficiency and design, Cement and Concrete Research, 2002, Vol.32, pp. 1525 – 1532.
17. S.Samada, A.Shahb. Role of binary cement including Supplementary Cementitious Material (SCM), in production of environmentally sustainable concrete: A critical review, International Journal of Sustainable Built Environment, 2017, Vol.6, Issue-2, pp. 663-674.
1.gif)
