건설재료시공학연구실

Building material & construction lab.

 Abstract
In this study, this tried to present the fundamental data for proposing quantitatively shrinkage cracking evaluation method such as plate-ring type test method. It is possible to decide the size of specimen with Ø150 and width 125mm to evaluate the restrain shrinkage crack properties of concrete. Also, effectiveness of test method according to mixing of PVA fiber is evaluated as part of a repeatability verification experiment of plate-ring type test method using ring diameter 150mm.
 As a result, increase in restrained stress varies from evaluation of the KS F 2595 and it is possible to evaluate quantitatively evaluation regarding crack and to measure restrained stress.
 Specially, it is possible to measure the crack due to the plastic shrinkage which was occurred within 48hours at early age in plate-ring type test method. Hereafter, it is considered that the study concerning environmental condition and mixing factor in plate-ring type test method is need.