原文传递
Performance evaluation of rapid-set prepackaged cementitious materials for rehabilitation off surface distress of concrete transportation structures
| 题名： | Performance evaluation of rapid-set prepackaged cementitious materials for rehabilitation off surface distress of concrete transportation structures |
| 正文语种： | 英文 |
| 作者： | Zhifu Yang;Heather Brown;Jon Huddleston;Wayne Seger |
| 作者单位： | University in Murfreesboro |
| 关键词： | Bond strength;compressive strength;permeability;prepackaged cementitious material;rapid set;resistance to freezing and thawing |
| 摘要： | This paper summarizes the findings of an extensive research project that aims to identify the successes and potential problems of 23 rapid-set prepackaged cementitious materials available on the market. The results of this study are anticipated to provide potential users with reliable information for deciding which materials have the greatest potential for desirable performance. It was found that most rapid-set prepackaged materials in this study demonstrated rapid setting, fast strength development, low permeability, and accept-able bonding capacity. However, the lack of resistance to freezing and thawing and the high sensitivity to restrained shrinkage cracking were likely to cause premature deteriorations. Research findings also indicated that although magnesium phosphate cement-based materials set and developed strength extremely quickly and shrank negligibly, their high permeability and poor durability made them unsuitable for long-lasting repairs. In contrast, some materials exhibited normal setting and strength development similar to what was observed in conventional Type III portland cement-based concrete. The main concerns for these materials were, again, poor resistance to freezing and thawing and high risk of shrinkage cracking. In rare cases, materials showed poor early-age or late-age strength, making them inadequate for repair of concrete transportation structures. |
| 出版日期： | 2016.03-04 |
| 出版年： | 2016 |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 卷： | Vol.61 |
| 期： | No.02 |
| 页码： | 81-96 |
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