Paper Title
Environmental Impacts Assessment of Interlocking Paving Block Production Using Municipal Incinerated Bottom Ash and Pet Pellet As Aggregate on Si Chang Island, Chonburi, Thailand

Abstract
The main objective of this research was to compare the environmental impacts ofinterlocking paving block production made from municipal incinerated bottom ash (MIBA) and PET pellet as a replacement of fine aggregate with the conventional interlocking paving blocks. Life Cycle Assessment (LCA) was used to investigate the environmental performance with software SimaPro version 8.3.0 using ReCiPe method.The analysis focuses on the scope “cradle to gate" which covers materials acquirement, transportation, and interlocking paving block production. The environmental impact categories were chosen as follows: Climate change, Ozone depletion, Terrestrial acidification, Human toxicity, Terrestrial Ecotoxicity, and Fossil depletion. The analysis demonstrated the environmental performances of interlocking paving blocks with MIBA have better results in almost allenvironmental impacts compared to conventionalinterlocking paving block and paving blocks with PET pellets. Because PET pellets have more burden in the raw material preparation process than MIBA, using MIBA as a partial replacement for sand in the production of paving bricks has a less environmental impact.If the reduction of PET pellets preparation process is possible or the analysis did not cover the raw material procurement, using PET pellets to replace some of the sand would be an alternative likewise MIBA utilization. Keyword - Environmental Impacts, Interlocking Paving Block, Municipal Incinerated Bottom Ash, PET Pellet, Life Cycle Assessment.