Figure 10 - A submerged tyre reef showing considerable growth.
Despite the quality of the tyre reefs, the AFCD studies show that natural
quarry rock piles and biofilters make the best reefs. For this reason, the AFCD has no
future plans to use tyres in the creation of artificial reefs. Please refer to Appendix I
for more information regarding tyre reefs.
The Hong Kong Highway Department has expressed interest in using
rubberized asphalt and has developed a pilot program to test the viability of the most
accepted and tested process of creating rubberized asphalt, the Arizona process,
developed by Arizona State University. According to Dr. Wong of the Civil
Engineering Department of Hong Kong Polytechnic University, the test phase of this
project, currently underway, is to ensure the Arizona process is suitable for Hong
Kong despite the extensive testing in the United States (See Appendix G). The Civil
Engineering Department of Hong Kong Polytechnic University, the Hong Kong