Concrete Pavements for Climate Resilient Low-Volume Roads in Pacific Island Countries

Johnson, Sam ; Faiz, Asif ; Visser, Alex

World Bank, Washington, DC

关键词: TRANSPORTATION INFRASTRUCTURE;    ROADS;    CONCRETE PAVEMENT;    CLIMATE RESILIENCE;   

RP-ID  :  141780

学科分类：社会科学、人文和艺术（综合）

来源: World Bank Open Knowledge Repository

【 摘 要 】

In pursuit of economic and socialdevelopment objectives, governments of Pacific IslandCountries (PICs) desire to upgrade unpaved low-volume roads(LVRs) for the improvement in connectivity and quality oflife associated with all weather-access. Whilst the benefitsare clear, the capital cost of conventional pavementtechnology and the recurrent cost of maintenance make ithard to justify the required investment in upgrading LVRs.Typical LVRs are surfaced with a bituminous chip seal or athin asphalt concrete (AC) layer on processed aggregate baseand subbase courses. Constructing such pavements in PICs isexpensive, given the scarcity of aggregate of requisitequality, relatively limited domestic road constructioncapacity, and scale diseconomies in the use of equipment,plant and materials. Moreover, vulnerability to naturaldisasters and climate change necessitates consideration ofmore resilient paving alternatives. The findings of thestudy suggest that there is substantial promise for concretepavements to be used for low-volume (<400 vehicles a day)roads. Four different types of concrete pavement wereassessed including the strengths, weaknesses and operationsand maintenance (O and M) implications of each pavementtype. Although prepared primarily for the PICs, the studyprovides valuable insights and technical guidance on theapplication of concrete pavements for LVRs in other regionsoutside of the Pacific Islands.