Abstract
The road surfaces on steel deck bridges have more amount of frost and snow cover than those on any other ones, because the former heat capacity is smaller. Therefore, traffic accidents occur frequently. Some field investigations were carried out to solve this problem in Fukui, a snowy and rather mild city. It was found that the insulator beneath the steel deck was ineffective. Phase change material which has the 3-5°C solidifying and melting point was set in the pavement on the steel deck to increase the heat capacity at just above the freezing point of water. This experiment showed that the phase change material saved solar energy in daytime for preventing the road surface from freezing on the following morning.
