| 種別 | paper |
| 主題 | A Study of Strength and Cracking Behavior of Ferrocement in Tension |
| 副題 | |
| 筆頭著者 | Mostafa KHANZADI（Hokkaido University） |
| 連名者1 | Ian VICKRIDGE（Manchester University） |
| 連名者2 | |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 16 |
| 号 | 1 |
| 先頭ページ | 519 |
| 末尾ページ | 524 |
| 年度 | 1994 |
| 要旨 | 1. INTRODUCTION Ferrocement is a composite structural material comprising a cement mortar matrix highly reinforced with layers of small diameter wire mesh uniformly distributed throughout a cross section of thickness not normally exceeding 50 mm. The arrangement of the reinforcement is such that the material exhibits behavior which is different from conventional reinforced concrete in strength, deformation and potential applications. Ferrocement began to be used in developed countries not only in boat industry, but also in submarine structures, shell structures, cylindrical silos, Sewer linings, water tanks, roof modules, pipes and irrigation conducts, and low cost housing. Several investigators have studied the behavior of ferrocement specimens in tension Naman, Walkus and Johnston. But little efforts have been done to investigate the effect of arrangement of mesh reinforcelnent and mortar cover on the cracking behavior of ferrocement sections under tensions. In this study these effects have been taken in to account and Six different arrangements, as shown in figure.1 have been adopted and tests were carried out in direct tension. 4. CONCLUSIONS An experimental program was carried out to study the effect of cover and arrangement of mesh reinforcement on the behavior of ferrocement in tension. From results of this experimental investigation, It is possible to draw the following conclusions. 1- It was observed that ferrocement having reinforcement evenly distributed with minimum cover, showed reduced crack width and an increased number of small cracks at failure compared with other arrangements of reinforcement. 2- The contributions of the tensile strength of the mortar and the specimen thickness on first crack strength is considered to be significant, while it can be considered negligible at ultimate strength. 3- It was observed that for specimens D, E and F the first crack strength increases as the specimen thickness and cover of wire mesh increases, but the ultimate strength decreases as the specimen thickness and cover of wire mesh increases. 4- An increase in specimen thickness results in a decrease in volume fraction and therefore specific surface. It was observed that as specimen thickness increases the number of small cracks decreases and the crack width increases. 5- The number of small cracks increased as the reinforcement arrangement was changed from evenly distributed to the center arrangement. 6- It was observed that for specimens D, E and F, deceasing the cover tends to increase the number of cracks and thus decreases crack width. |
| PDFファイル名 | 016-01-1085.pdf |