This study presents flowable fill material using collected CO2 byproduct, which prevents geotechnical sinking related to underground utilities in the vicinity of downtown areas. The physical and mechanical characteristics of calcium carbonate found using laboratory tests (the uniaxial compressive strength test, comparison of the shear base of dynamic behavior and restriction pressure, the freeze-thawing test) on 3, 7, 14, 28, and 56 days of the flowable fill were investigated and analyzed. The correlations of the unconfined strength, elastic modulus, flow, and w/c were suggested as evaluation indicators of the mechanical characteristics for the calcium carbonate flowable fill.

Abstract
 I. 서 론
 II. 탄산칼슘(CaCO3)의 특성
  1. 탄산칼슘(CaCO3)의 개요
  2. 탄산칼슘의 포집과정
  3. 탄산칼슘의 물리적 특성
  4. 탄산칼슘의 역학적 특성
 III. 실험조건 및 방법
  1. 실험조건 및 방법
  2. 동결융해시험
 IV. 시험 결과 분석
  1. 응력-변형률 거동
  2. 일축압축강도 특성
  3. 탄성계수의 변화
  4. 동결융해 특성
 V. 결 론
 감사의 글
 References

• 박진우(서울과학기술대학교 토목공학과, Department of Civil Engineering, Seoul National University of Science and Technology) | Jin Woo Park
• 박태순(서울과학기술대학교 토목공학과, Department of Civil Engineering, Seoul National University of Science and Technology) | Tae Soon Park Corresponding author