| 種別 | Paper |
| 主題 | APPLICATION OF SELECTIVE DISSOLUTION METHOD FOR THE DETERMINATION OF SLAG ADMIXTURE REPLACEMENT RATIO IN FRESHLY-MIXED CONCRETE |
| 副題 | |
| 筆頭著者 | Takeshi KOKADO |
| 連名者1 | Isamu INAMOTO |
| 連名者2 | Hiroaki OKUMURA |
| 連名者3 | Sin’ichi NUMATA |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 10 |
| 号 | 2 |
| 先頭ページ | 825 |
| 末尾ページ | 830 |
| 年度 | 1988 |
| 要旨 | INTRODUCTION In recent years, the ability of Concrete to withstand alkali-aggregate reaction salts or sea-water attack has been called for, and the use of ground granulated blast-furnace slag, which is mixed within the concrete mixer as a cementations admixture, has attracted attention. It is important, however, in terms of execution and quality control of the work to ascertain that slag is used accurately in a prescribed amount. This study relates to test methods for determining the slag replacement ratio in cementations materials by which samples or concrete are taken in the stage or fresh Concrete. CONCLUSIONS A satisfactory determination method of slag replacement ratio in fresh concrete can be established using the washing analysis of fresh concrete and dissolving a sample in a mixed solution of salicylic acid, acetone and methanol, and determining the unhydrate slag content from the amount of insoluble residue, it is important to prevent the sample from reacting before the sample is analyzed after the treatment for stopping hydration. It was ascertained that this problem can be solved by conducting cleaning the sample with acetone three times or more and by employing a suction filtration using an aspirator. If the hydration of a sample stops, it is possible to conduct the salicylic acid-acetone dissolution test on the sample in the laboratory and the slag replacement ratio in fresh concrete can be appropriately determined with some correction of fine-grains contaminated in the paste portion from aggregates used. |
| PDFファイル名 | 010-01-1147.pdf |