建設廃棄物の再資源化のプロセスとエネルギー消費量の算定に関する研究

学生名:小川 由美子
研究テーマ:Research on recycle process and energy consumption about recycle of construction waste
(建設廃棄物の再資源化のプロセスとエネルギー消費量の算定に関する研究)
入学年月:2006.09
修了年月:2003.04
取得学位:博士（学術）
論文概要:The investment of building construction industry in Japan is about 20% of GDP. This fraction is much higher than in most developed countries. That results the Japanese building construction industry including residential use consumes about one third of all energy and resources of the entire industrial sectors. In order to save energy as well as resource, the recycle of the building materials should be urgent to be carried out. In this research, we try to make clear the process of the building demolition construction and to present a method to predict the energy consumption for recycling the building demolition materials. Firstly, we have a questionnaire and field survey on the dismantling and intermediate processing enterprises. Secondly based on the field study, we focus on the potential energy savings with a simple calculated method when the building materials or products are manufactured from recycled materials. The results have shown for most building materials, the energy consumption needed to remake housing materials from recycled materials is lower than that to make new housing materials. The energy consumption of building materials in all case studies can be saved up to 13%. At the same time, the resource, measured by mass of building materials (kg) can be decreased significantly.

In chapter 1, the research background and purpose and summary of this research were shown.

In 2nd chapter, investigating past research as a basic research, it showed the positioning of this research. In this chapter, investigating the policy of the administration regarding the recycling conversion of the constructive waste, you searched the reason of waste recycling promotion. I investigated the literature concerning recycling method and the use. With this section the fact that use of recycling conversion changes with the form and processing method of the constructive waste was shown, circumstance ahead accepting the recycling item was grasped.

In chapter 3, the result of the field investigation in each actual place as a case study is shown. We executed field investigation concerning the present condition regarding the process of dismantling construction and recycling conversion, elucidated the actual condition of the constructive waste. In Japan processing of the industrial waste is big problem. And, we drawing up the questionnaire which is based on field investigation, executed questionnaire survey and heard in the dismantling trader and the intermediate processing trader took and investigation. We investigated the dismantling enterprise, inspected concerning the change of cost and the job duration in dismantling actual place. Support it did concerning the result of consciousness investigation.

In chapter 4, it researched theoretically. We defined concerning recycling method and division. In this research the energy consumption is used as a evaluation figure. We divided the form of recycling conversion of the building materials and the constructive waste, proposed the computation method of the energy consumption, which catches respectively. These inside several computation methods used the industrial linkage chart. Computation method, intermediate processing energy computation method and playback component production energy computation method of dismantling construction and transport energy were shown in this chapter.

In chapter 5, in order to verify the investigation contents of chapter 3, questionnaire survey and the result you analyzed. Investigation was executed concerning the type and the consumption etc. of quantity and use equipment and fuel of constructive waste which it occurs on each site on the basis of the findings from which is executed in 3rd chapter. We from the result, made energy consumption, led the basic unit from the findings from.

In chapter 6, production energy of the construction component was computed as an applied research, making use of theoretical calculation, we compared the computation result.

We showed the beneficial characteristic of the thing that uses the recycling material. It calculated as actual proof research, With 6-2 the production energy quantity of the raw materials is calculated concerning the new material and the recycling material.

In chapter 7, the case study it did as a applied research. In this chapter, on the basis of the computation result to 6th chapter from 4th chapter, targeting the door building residence and the multiple dwelling houses. With 7-2, it changed the amount used of the recycling material in the case study, it computed the reduction ratio of the energy consumption which depends on the reduction and construction of new material amount used every of case. With 7-3, when the energy reduction ratio in the life cycle of the building, has an influence on the use of the recycling material it made clear. Depending upon the building and case setting, difference although it occurs, when it has contributed to the energy conservation, proved the fact that the recycling material is used to the energy consumption.

In chapter 8, it collected the research result as an outline, it expressed concerning topic and view. In this research, it selected the energy consumption recycled the constructive dismantling material and as criteria, the case where the construction component is produced it proposed the technique which computes energy.

In this research, Kitakyushu city was designated as investigation object area. Kitakyushu city participates to echo town business, executes various recycling businesses as an environmental advanced city. Because of that, it judged as the optimum sample as one of the model cases in order to promote the recycling conversion of the constructive waste. Recently the constructive waste from the national capital region is carried to Kitakyushu. In the future and carrying out of the waste to the district it is possible from the urban district. Because of that, it is very important to establish the model case at the provincial city.