Annotated Summary

Chen, M.J., & Wong, Y.D. (2013). Porous asphalt mixture with 100% recycled concrete aggregate. Road Materials and Pavement Design, 14:4, 921-932. DOI: 10.1080/14680629.2013.837839

This article focuses on the application of recycled debris in porous asphalt mixtures. Porous asphalt mixture contains high percentages of air voids, which will allow excess water on the road surface to seep through. The article compares the strength and durability of the augmented mix against requirements set by the Land Transport Authority of Singapore. According to Chen & Wong (2013), this is a sustainable procedure in waste disposal as "reusing construction debris can reduce the demand on quarrying as well as decrease the intensity of waste disposal". The article also reports that although recycled debris may be weaker than regular coarse aggregate, the end product created by the former is still suitable for use in pathways and pavements. With the addition of chemical additives, the asphalt can then be strengthened for use on roads with lower traffic volumes. This article includes various statistics such as the composition of aggregates in the different types of porous asphalt mix used for testing as well as their respective strength, density and void content to facilitate their functionality. This aids in our research project on the usage of porous asphalt to prevent flooding as it provides thorough information on porous asphalt, from manufacturing to the application of the end-product. It also provides some insight as to how engineers can do their part in sustainability through the means of recycling.