混凝土製品應用於土木工程之減碳效益評估-以道路、建築工程為例

Global economic is booming day by day since the industrial revolution. With population growth and technological progress, human make endless demands for natural environmental. Greenhouse gas is mass production, so that the impact of human activities for the natural environmental, which not only earth''s surface but also the atmosphere. With atmospheric flow, Greenhouse gas spread to the whole world result in global warming and global environmental change. In a decade, industrial energy efficiency has promoted which caused decreasing of carbon dioxide in many industries. However, this progression is countervailed by the global industrial growth. Taiwan’s industrial structure produces the most yields of carbon dioxide. For civil construction industry, the most commonly used material is concrete which used by building construction, bridge and pavement. This research focuses on the concrete product using in construction and road works, for the commonly used type in the construction works nowadays, which including cement concrete and asphalt concrete. According to Product-Category Rules (PCR) set of calculation from “Cradle to gate” to product yield evaluated carbon emissions. The result indicated that carbon emissions calculation of every stage to produce concrete product, the material ration of mix design is the main factor. For cement concrete product, the proportion of cement materials and the proportion of replacement materials are the main impact factors of carbon emissions. For asphalt concrete product, recycled asphalt concrete produce less than general asphalt 4.533 kg CO2-e per ton.