철근 콘크리트 기초 시공 시 단위 작업량에 대한 건설기계 CO2 배출량 산정

Abstract

Greenhouse Gas(GHG) triggering global warming is closely associated with the heavy use of fossil fuels. Tremendous academic and industrial interest has been devoted to resolve the severe environmental crisis caused by abrupt climate changes. The construction industry is considered as one of the major contributors for global greenhouse gas emissions. Currently, the amount of greenhouse gas emitted from construction source is estimated by an indirect measurement method using carbon emission factors based on a statistically calculated fuel consumption of construction machines. This research was performed with three kinds of construction machines being used in concrete foundation constructions. After accurately grasping the operation characteristic of each construction machine, we classified operation conditions into no-load and load, according to the status of a power transmittance to chassis dynamometer. The amount of emissions(CO2 concentration, temperature and flow rate) was measured according to RPM(Revolution Per Minute) changes of each construction machine. CO2 emission per unit work was calculated by measuring the productivity and the engine load condition during construction machine operation. In this study, the amount of CO2 emitted from concrete foundation process of unit volume was estimated to be 3.66kg/㎥ through the direct measurement method. CO2 emissions measured by the direct measurement method is about 40% of those derived from the indirect measurement method based on the existing fuel consumption standard. Various kinds of construction machines are being used more in actual construction field than those used in this study. In future study, it is necessary to establish a realistic database through a direct measurement method for measuring CO2 emitted from various construction machines.