• International conference on construction engineering and project management
• /
• 2024.07a
• /
• pp.1275-1276
• /
• 2024

Construction is like a symbol of social development. Buildings and public infrastructures are required to support people's lives and a country's development. With the increasing construction, the waste of construction increases as well. Demolition wastes from existing buildings or urban renewal plans also increase the waste quantity. Construction and demolition wastes (CDW) are majorly inorganic materials and have high recycling potential. However, the recycling rate of CDW is not 100% and needs more methods to raise the rate. In Taiwan, the CDW has two authorities, one is CDW waste managed by the Ministry of Environment (MoE), and the other is construction spoil soils managed by the National Land Management Agency, Ministry of Interior. In 2022, the CDW waste is 2.12 million tons, and construction spoil soils are around 43 million m³. In this study, the current status of CDW in Taiwan was reviewed and material flow analysis was applied to link the materials sources to CDW. The results showed that 35% of waste concrete flowed back to the source materials and 65% was disposed of or used as secondary materials. However, 95% of waste steel was used back as raw materials and only 5% was disposed of or used in other materials. To increase the recycling of CDW, the priority method is to force the material separation onsite. Mixing CDW would increase the cost of recycling and decrease the market competition ability. New technology to collect and recycle the CDW as a new material is also recommended. Finally, a new law, the Resources Recycling Promotion Law, is coming in this year, 2024, which is expected to turn the waste into resources in Taiwan.

• Journal of KIBIM
• /
• v.12 no.2
• /
• pp.26-39
• /
• 2022

The purpose of this study is to establish a novel system for on-site management of construction and demolition waste. Construction waste has always been one of largest waste in the world and has long lacked an effective management system. Although various countries have planned the disposal of waste at the political level, the real-time and effective management of construction sites has not been mentioned. Especially in China, the continuous development of the construction industry also generates a large amount of waste, and China is not prepared for a large amount of construction waste. In order to alleviate the huge impact of construction waste on society and the environment, this study proposes a waste management method that combines Building Information Modeling technology and Radio Frequency Identification technology. Through this research, by using information technology to manage the generation and discharge of construction waste, and record the amount and information of waste generation, also improve the management method of construction waste.