Moisture diffusion and differential drying shrinkage of concrete = 콘크리트의 수분확산과 부등건조수축에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 250
  • Download : 0
Cracks due to differential drying shrinkage occur mainly on exposed surfaces of concrete structures, and appear to be very complicated with time. Thus it is impossible to control the cracks due to differential drying shrinkage by previous researches on average drying shrinkage of concrete which does not consider the non-uniform moisture distribution in concrete. Therefore, based on moisture diffusion of concrete, the differential drying shrinkage of concrete was investigated in this dissertation. The analytical method of moisture diffusion of concrete was firstly developed to estimate the differential drying shrinkage. From the moisture distribution in concrete obtained by analysis of moisture diffusion, the analytical method of differential drying shrinkage was suggested, in which the creep of concrete was also considered. The internal relative humidity in concrete was measured for drying specimen at early ages, and the change of relative humidity due to self-desiccation was also measured for sealed specimen. The effect of concrete strength and initial moist-curing time on relative humidity distribution in concrete was investigated. And the validation of moisture diffusion theory was verified by comparing experimental results with analytical results. In addition, the experiments for differential drying shrinkage were carried out at early ages, in which the autogenous shrinkage due to self-desiccation was also considered. The effect of concrete strength and initial moist-curing time on shrinkage strain distribution in concrete was investigated. And the validation of suggested analytical method was also verified by comparing experimental results with analytical results. The moisture distribution in low-strength concrete is mostly influenced by moisture diffusion of concrete, but the effect of self-desiccation is negligible. The rate of moisture diffusion in low-strength concrete is much higher than that of high-strength concrete, and the relative humidity near t...
Advisors
Kim, Jin-Keunresearcher김진근researcher
Description
한국과학기술원 : 토목공학과,
Publisher
한국과학기술원
Issue Date
1999
Identifier
150173/325007 / 000955307
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 토목공학과, 1999.2, [ ix, 130 p. ]

Keywords

Moisture diffusion; Concrete; Differential drying shrinkage; 부등건조수축; 수분확산; 콘크리트

URI
http://hdl.handle.net/10203/30508
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=150173&flag=dissertation
Appears in Collection
CE-Theses_Ph.D.(박사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0