Abstract:
In this paper, the utilization ofC&D(Construction and Demolition)waste
for roads and pavements construction is reviewed in the international context. Further,
the results are assessed to see the relevance to Sri Lanka. The relevant references gathered
from the databases are referred to this study. The different countries and regions
including Asia, Australia, Middle-East, Europe, and the USA, are covered with 67
papers. Those references are critically reviewed by applying PRISMA (Preferred
Reporting Items for Systematic Reviews and Meta-Analysis) methodology and key
C & D waste types utilized for roads and pavements construction are found out. The
paper discusses Recycled Concrete Aggregates (RCA), Crushed Clay Bricks (CCB),
and Recycled Asphalt Pavement (RAP) as the C & D materials that commonly are
used for roads and pavements construction. Also, policies, laws, regulations, and
procedures adopted in multiple countries, applicable to the C & D waste sector are
discussed in the paper. The findings are evaluated in the latter part of the paper and
proposed applicability/rationales to Sri Lanka are examined simultaneously. The
authors conclude that the specified three types of CDW based recycled materials
could be utilized across the cross-section of roads and pavements through effective
methods and applications in several counties and the same approach is applicable
in Sri Lanka also. This study confirms that very significant policy support in terms
utilization of CDWis evident in most countries and the particular learnings could be
applied in Sri Lanka to improve the current state appropriately.
