4.6 Article

Sustainability Assessment of Using Recycled Aggregates in Concrete Block Pavements

Journal

SUSTAINABILITY
Volume 12, Issue 10, Pages -

Publisher

MDPI
DOI: 10.3390/su12104313

Keywords

concrete block pavements; mechanistic design; recycled aggregates; eco-efficiency

Funding

  1. Concrete Masonry Association Australia (CMAA)

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The mechanistic design of a concrete block pavement (CBP) can be very complicated and often requires the use of computer programs. This paper presents a new mechanistic-empirical method, which is implemented in a computer program (DesignPave) that calculates base course/sub-base thicknesses for a range of design inputs such as traffic load, interlocking properties, and material stiffness. A range of virgin and recycled unbound granular materials were also experimentally tested to characterize them for possible use as base course or sub-base materials. Combining the new mechanistic-empirical method and the range of base course/sub-base course materials (virgin and recycled aggregates), it was found that while a CBP containing recycled aggregates did not offer a significant direct financial benefit based on the characteristics or material costs, the associated environmental benefits were very high.

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