Kansas Pavement Preservation Initiative: Development of a Seal Coat Design and Construction Manual and Investigation of Design of Seal Coats with Light Weight Aggregates
| 项目名称： | Kansas Pavement Preservation Initiative: Development of a Seal Coat Design and Construction Manual and Investigation of Design of Seal Coats with Light Weight Aggregates |
| 摘要： | Like many other states, dwindling budgets for pavement preservation program are forcing the Kansas Department of Transportation (KDOT) to look closely at the pavement preservation techniques. Pavement preservation has been a hall mark of KDOT pavement management system - NOS. The KDOT pavement preservation program actions for asphalt-surfaced pavements include route and crack seal, chip seal, 1- to 4-inch overlay, 1- to 4-inch inlay, heater scarification, cold in-place recycle (4-inch), ultra-thin bonded bituminous surface (Nova chip), modified slurry seal, and cold milling. For most part, these methods are selected either based on historical experience or based on the manufacturer's recommendations for the proprietary ones. Thus there are large knowledge gaps in terms of effectiveness, durability, and other important factors. A review of use of these methods on the KDOT system indicates that approx. 1,450 miles of conventional seal (chip seal) has been placed from 2001 to 2005. This strategy, by far, is the most widely used pavement preservation technique in Kansas as illustrated in Figure 1. With anticipated reduction in substantial maintenance money in the near future, the use of seal coat is expected to rise. It may also be mentioned that seal coat is a very popular treatment with the local agencies too. Under funding from the Kansas State University (KSU) University Transportation Center (UTC), the Principal Investigator and the Consultant of this project will be offering a 1-day training class on thin surface treatments for the administrators and engineers, and a 2-day training class (open to all) on thin surface treatments in the Spring of 2008. However, because of widespread use, requests have been made by the KDOT engineers to put together a class on chip seal only. The states that have become very successful in applying this strategy have also developed their own training and associated seal coat manual. This project proposes to develop such a training class and manual for Kansas. Again, current seal coat design methods were developed for regular aggregates. KDOT exclusively uses light-weight aggregates. There have been some recent problems with seal coats in Kansas and light-weight aggregates have been blamed for these problems. Almost no information is now available on seal coats with light weight aggregates. Thus the design methods need be to be reinvestigated for the light-weight aggregates. |
| 状态： | Active |
| 资金： | 130000.00 |
| 资助组织： | Kansas State University Transportation Center |
| 项目负责人： | Stokes, Robert W |
| 执行机构： | Kansas State University Transportation Center |
| 开始时间： | 20080701 |
| 实际结束时间： | 20110630 |
| 主题领域： | Design；Highways；Pavements |
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