Pre-overlay Treatment of Existing Pavements
This report explores current pre-overlay treatment practices of state departments of transportation for both hot-mix asphalt and portland cement concrete pavement structures. The report is designed to help pavement management and pavement design groups in their selection of pre-overlay treatments.
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CHAPTER THREE HOTMIX ASPHALT OVERLAY OVER EXISTING
CHAPTER FOUR JOINTED PLAIN CONCRETE PAVEMENT OVERLAY OVER
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affected areas Apply Cold in-place recycle Concrete Overlay Crack fill depth of inches depth repair diamond grinding El Crack employed pre-treatment strategies existing HMA existing pavement fill without cleaning fill without routing fog seals full-depth repair high severity HMA inlay HMA overlay HMA patch HMA pavement Hoemer Hot in-place recycle inlay with HMA JPCP or CRCP JPCP overlay literature review suggests load transfer longitudinal cracking Longitudinal Joints material moderate and high moderate severity partial-depth repair pavement structure pavement surface Perform a full-depth Perform a partial-depth perform any pre-overlay Place an HMA Place HMA placing the HMA pre-overlay treatment pretreatment required principal primary strategy Raveling loss reﬂection cracking relative Remove and perform Remove and replace replace slab responses rubblization secondary strategies shown in Figure spalling strategies not shown Strategy FIGURE subgrade tie-bars trafﬁc transverse cracking transverse joints treatment before placing UBCO UBCO on HMA unbonded overlays Water Bleeding