Abstract
Concerning CO2 emissions related to infrastructure development, common calculation methodology has not been certified. Common calculation methodology is necessary to know effective approach toward total CO2 emissions reduction. In this study, we develop a calculation method of CO2 emissions related to infrastructure development and propose it as common methodology. As the first step, we focus our attention on major construction materials, because the manufacturing of construction materials occupies a large part of the total CO2 emissions.
The calculation method should satisfy the following requirements: (1) covering all CO2 emissions, (2) based on material quantities, (3) having clear evidence, (4) categorizing materials from perspective of those concerned with infrastructure development, (5) able to reflect site oriented data, and (6) updated annually.
The developed method combines the pile-up and the input-output technique to satisfy the requirements above. The major part of CO2 emissions is calculated with material based quantities by applying the pile-up to input of primary material and energy consumption. Complementary use of the input-output, we developed, covers all the domestic activities, includes product developments, fixed capital formations, and the others. An estimation, using official and industry-based statistics for some major construction materials such as cement and aggregate, confirms that the pile-up calculates approximately 90% of CO2 emissions due to the manufacturing activities. The method also enables us to update ordinary CO2 emissions of the construction materials annually.
