The life cycle analysis of high quality recycled aggregate made from demolished concrete by heating and rubbing was carried out. In order to evaluate the applicability of the fine powder produced during the recycled aggregate production as a soil stabilizer, the uniaxial compressive strength of some soil was examined when the cement soil stabilizer and the classified fine powder are added to the soil. As a result, the life cycle CO2 is a negative value because the evaluated deduction of CO2 emission of cement soil stabilizer manufacturing by the powder is larger than that of the recycled aggregate production. This technology is proved to be very effective to reduce CO2.
