| Title |
Mock-up Test for Reducing Drying Shrinkage of Concrete Structure |
| Authors |
Yoon Seob ; Song Seung-Heon ; Han Min-Cheol ; Han Cheon-Goo |
| Keywords |
Drying Shrinkage ; Expasive Additive(EA) ; Shrinkage Reducing Agent(SRA) ; Flowing Method |
| Abstract |
In this paper, tests were carried out using mock-up concrete structures to verify the shrinkage reducing method by applying flowing concrete method along with expansive additive(EA) and shrinkage reducing admixture(SRA). Optimal addition ratio of EX and SRA were determined initially through laboratory tests. Based on laboratory test 4 different wall and slab shape mock-up structures were fabricated reflecting mixture and execution condition. D structure, which applied flowing concrete method along with EX and SRA, resulted in shortening of setting time compared to that of A structure(conventional concrete), while bleeding decreased slightly and compressive strength relatively constant. For drying shrinkage, the effect of drying shrinkage reduction is in order of D>C(combination of EX and SRA)>B(flowing concrete method)>A(conventional concrete). For the effect of member thickness and position, thin section in cross section and outer part had larger drying shrinkage. It is clarified from the results of present paper that the application of flowing concrete method along with EX and SRA makes it possible to secure the stability against drying shrinkage. |