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논문 기본정보

Strength Development and Carbonation Characteristics of Slag Cement/Class C Fly Ash blended CO2 Injection Well Sealant

논문 개요

기관명, 저널명, ISSN, ISBN 으로 구성된 논문 개요 표입니다.
기관명 NDSL
저널명 지하수토양환경 = Journal of soil and groundwater environment
ISSN 1598-6438,
ISBN

논문저자 및 소속기관 정보

저자, 소속기관, 출판인, 간행물 번호, 발행연도, 초록, 원문UR, 첨부파일 순으로 구성된 논문저자 및 소속기관 정보표입니다
저자(한글) Kim, Tae Yoo,Hwang, Kyung-Yup,Hwang, Inseong
저자(영문)
소속기관
소속기관(영문)
출판인
간행물 번호
발행연도 2016-01-01
초록 CO 2 injection well sealant is vulnerable to supercritical CO 2 (scCO 2 ) exposure. To develop an alternative to the conventional sealant system (class G cement/class F fly ash), the performance of slag cement (SPC) systems containing class F fly ash (FFA) or class C fly ash (CFA) was evaluated and compared with the conventional sealant under scCO 2 conditions. All sealant systems showed an immediate increase in compressive strength upon scCO 2 exposure and, at 37.6 MPa, SPC/CFA showed the highest compressive strength after 14 days, which was much higher than the 29.8 MPa of the conventional sealant system. Substantial decreases in porosity were observed in all sealant systems, which were partly responsible for the increase in strength. Carbonation reactions led to pH decreases in the tested sealants from 12.5 to 10~11.6. In particular, the greatest decrease in pH in slag cement/class C fly ash probably supported relatively sustainable alkali activation reactions and the integrity of cement hydrates in this system. XRD revealed the presence of CaCO 3 and a decrease in the content of cement hydrates in the tested sealants upon scCO 2 exposure. TGA demonstrated a greater increase of CaCO 3 and calcium-silicate-hydrate phases in SPC/CFA than in the conventional sealant upon scCO 2 exposure.
원문URL http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=03553784&target=NART&cn=JAKO201614859315635
첨부파일

추가정보

과학기술표준분류, ICT 기술분류,DDC 분류,주제어 (키워드) 순으로 구성된 추가정보표입니다
과학기술표준분류
ICT 기술분류
DDC 분류
주제어 (키워드) CO lt,SUB gt,2 lt,/SUB gt,storage,Oil well cement,Slag cement,Fly ash,Carbonation