One of the difficult points of concrete traceability is that a product number or product data can not be pasted directly on fresh concrete due to its flow ability. In this study, several types of IC-Tags and concrete were unified by mixing on agitator. The behavior of IC-Tags at concrete work, influence of them on concrete and responsiveness of them by the radio wave were evaluated through the actual construction steps. Besides, suitable number of IC-Tag for reliable detection from the hardened concrete was estimated. From these results, it was demonstrated that IC-Tags could be apply to concrete traceability.
The purpose of this research is reducing the cracks produced in the plastering mortar that has contraction restrained by ground concrete about the outer wall and floor component of reinforced concrete buildings. It tried to evaluate the relation between the construction time of plastering mortar and the small crack produced on the mortar surface by this paper. The examination object which finished in the middle of the month every month of one year, and constructed mortar was exposed to the outdoors and indoor using the small concrete with plastering mortar specimens , and the generating situation of a crack was observed. Consequently, it was experimentally shown clearly that small cracks become easy to produce the time when temperature falls in one month after the mortar plastering.
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