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충남대학교

충남대학교 건설재료시공학연구실

Building material & construction lab.

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프린트 확대 축소

국내전문학술

이계혁, 김규용, 이보경, 신경수, & 남정수. (2017). α 형 반수석고를 치환한 모르타르의 응결 및 압축강도, 건조수축 특성. 한국구조물진단유지관리공학회 논문집 (KSMI), 21(5), 117-124.
이계혁, 김규용, 이보경, 신경수, & 남정수. (2017). α 형 반수석고를 치환한 모르타르의 응결 및 압축강도, 건조수축 특성. 한국구조물진단유지관리공학회 논문집 (KSMI), 21(5), 117-124.
작성자 관리자
조회수 114 등록일 2017.09.01
주저자 이계혁
교신저자 042-821-7731
공동저자 이보경, 신경수, 남정수
학술지명 한국구조물진단유지관리공학회 논문집 제 21권 제 5호
Abstract
In this study, to evaluate the setting time, compressive strength and drying shrinkage of ordinary Portland cement and Portland blast-furnace slag cement mortar with 0, 10, 20, 30 wt.% alpha-calcium sulfate hemihydrate. As a results, as the replacement ratio of alpha-calcium sulfate hemihydrate increased, the initial setting time of ordinary Portland cement and Portland blast-furnace slag cement mortar was faster. In addition, the compressive strength decreased with increasing replacement ratio of alpha-calcium sulfate hemihydrate in both ordinary Portland cement mortar and Portland blast-furnace slag cement mortar. The strength development of Portland blast-furnace slag cement mortar with alpha-calcium sulfate hemihydrate was effective than that of ordinary Portland cement mortar. On the other hand, in the case of the mortar with alpha-calcium sulfate hemihydrate, it was confirmed that shrinkage deformation was reduced at the early age by growth pressure of needle-shaped ettringite crystals produced by incorporation of alpha-calcium sulfate hemihydrate. However, the effect of inhibiting shrinkage deformation of mortar with alpha-calcium sulfate hemihydrate was not significant as the age passed. Therefore, it is considered that the alpha-calcium sulfate hemihydrate is useful as a construction material.