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Evaluation of Timber Blocks for Temporary Inserts in Concrete Patching; Final rept. Jul 98-Jul 99
| 题名： | Evaluation of Timber Blocks for Temporary Inserts in Concrete Patching; Final rept. Jul 98-Jul 99 |
| 作者： | Lucas, M. J.; Howrylak, C. H. |
| 关键词： | Concrete pavements; Maintenance; Inserts; Cutting; Railroad ties; Plywood; Blocks; Slabs; Structural timber |
| 摘要： | The purpose of this final report is to evaluate the use of timber blocks as temporary inserts for concrete patches. Timber blocks are made of creosoted railroad switch ties with an industrial grade plywood covering. A skid resistance material also is applied to the surface for safety. These platforms primarily are used for patching on heavily traveled highways, when construction takes place overnight and it is necessary to reopen the highway to motorists during the day. Previously in this situation, a very limited number of patches could be completed because of the existing concrete had to be saw cut, removed, doweled, and the new concrete had to be poured and cured in one shift, allowing no additional work to be done after pouring. The use of timber blocks allows the Contractor to continue working after the concrete pour. While waiting for the concrete to cure, additional patches can be excavated and filled with the temporary timber block inserts. The timber blocks withstand the heavy traffic while the roadway is open, can be removed quickly at the start of the next construction shift, and can be replaced by the permanent concrete patches. Productivity is increased with the use of timber blocks. The timber block inserts are recommended for further use by the department. |
| 总页数： | 24p |
| 报告类型： | 科技报告 |
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