Concrete Pavements for Climate Resilient Low-Volume Roads in Pacific Island Countries
In pursuit of economic and social development objectives, governments of Pacific Island Countries (PICs) desire to upgrade unpaved low-volume roads (LVRs) for the improvement in connectivity and quality of life associated with all weather-access. W...
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| Language: | English |
| Published: |
World Bank, Washington, DC
2019
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| Online Access: | http://documents.worldbank.org/curated/en/537681568381365403/Concrete-Pavements-for-Climate-Resilient-Low-Volume-Roads-in-Pacific-Island-Countries http://hdl.handle.net/10986/32394 |
| Summary: | In pursuit of economic and social
development objectives, governments of Pacific Island
Countries (PICs) desire to upgrade unpaved low-volume roads
(LVRs) for the improvement in connectivity and quality of
life associated with all weather-access. Whilst the benefits
are clear, the capital cost of conventional pavement
technology and the recurrent cost of maintenance make it
hard to justify the required investment in upgrading LVRs.
Typical LVRs are surfaced with a bituminous chip seal or a
thin asphalt concrete (AC) layer on processed aggregate base
and subbase courses. Constructing such pavements in PICs is
expensive, given the scarcity of aggregate of requisite
quality, relatively limited domestic road construction
capacity, and scale diseconomies in the use of equipment,
plant and materials. Moreover, vulnerability to natural
disasters and climate change necessitates consideration of
more resilient paving alternatives. The findings of the
study suggest that there is substantial promise for concrete
pavements to be used for low-volume (<400 vehicles a day)
roads. Four different types of concrete pavement were
assessed including the strengths, weaknesses and operations
and maintenance (O and M) implications of each pavement
type. Although prepared primarily for the PICs, the study
provides valuable insights and technical guidance on the
application of concrete pavements for LVRs in other regions
outside of the Pacific Islands. |
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