Slurry seal was first developed in the mid-1930s in Germany and first used at the Berlin-Staaken Airport. The consistency of the mixtures made it easy to spread with brooms, squeegees, and spreader boxes. California began using the slurry seal in the late 1930s. It wasn’t until 1955 that a machine was built specifically for slurry seals. By the 1960s, with improved emulsified asphalt and the introduction of continuous flow machines, the real interest was shown for using the slurry seal in a wide range of applications. Currently, slurry seals are used for public roads, highways, airport runways, parking lots, and a multitude of other surfacing needs throughout the world. The technology has been accepted and incorporated into many maintenance programs as a cost-effective maintenance treatment. Due to the lack of research funding in the past, many local agencies in California simply do not have much information on the long-term performance of slurry seals. Therefore, this research topic will develop performance models for slurry seals. And then we can use the performance model to determine the life extension and economic benefits of slurry seals by local agencies. We also want to develop pavement preservation training materials for agency and contractor personnel. So far, the California Pavement Preservation Center has developed four asphalt pavement preservation training manuals. In 2021, we plan to develop a training Manual for Asphalt Pavement Repair and Resurfacing Preparation, which will include some most commonly used asphalt pavement maintenance technologies, suitable by state and local agencies in California. One of the major goals of SB 1 for CSU Research Funding is for workforce-related education, training, and development. Currently, there are training opportunities at the national level and state level on pavement preservation. However, training materials for local agencies are very scarce and even some of the training materials for Caltrans also need to be updated. The development of these training materials is critical to maintain or improve the current performance levels for the various pavement maintenance treatments. On the other hand, both the state and local agencies as well as industry need a qualified workforce to have a better understanding of general pavement and pavement preservation strategies.
California State University, Chico
The overall expected benefits of this project are knowledgeable personnel, longer pavement service lives, few pavement failures, cost-effective treatments, and safer roads for the traveling public. We plan to present the results of this study to WRAPP (Western Regional Association of Pavement Preservation), CalAPA (California Asphalt Pavement Association), MTC User’s week. We would also submit papers to the TRB or other conferences. We also plan to publish the new manual and report to the CSUTC website through MTI. The end-users of the research results would be City and Counties, and Caltrans in California. They will be provided valuable information to help identify suitable pavement preservation treatments. The results would also help local agencies’ pavement management system.