10-17. Key characteristics of concrete pavement patching. Pavement Performance Conditions Addressed Contraindications Indicators Affected Functional/Other Significant structural failure. + Joint load transfer Longitudinal cracking. Materials-related distress efficiency (full-depth Transverse cracking. (i.e., D-cracking or ASR). repairs only). Corner breaks. Extensive pavement + Load-related transverse Joint spalling. deterioration, little remaining slab cracking. life. + spalling. Structural + Punchouts. Adds some localized Additionally for repairs: +/– Smoothness. structural benefit. Compressive stress buildup in long-jointed pavements. Dowel bar misalignment or lockup. Improper joint construction. Working cracks caused by shrinkage, fatigue, or foundation movement. Slab replacement: 10 to 15 years. Expected Life Spall repair: 5 to 15 years. For jointed pavements, in many cases it may be more cost effective and reliable to forgo repair for slab replacement. Special consideration should be given to defining repair boundaries, preparing the base, restoring joint load-transfer (full-depth repairs only), and finishing, texturing, and curing the patch. High early-strength concrete mixes may be an option when curing time is an issue. Remarks It is not desirable to create a large number of closely spaced joints in pavement such as would result from placing a number of closely spaced patches. Treatment can perform well in all climatic conditions. Capable of performing under all traffic conditions. Additional Spall repair performance is closely related to bonding conditions: poorly bonded repairs have an extremely short life. Figure 10-37. Repair boundary recommendations for JPCP (NHI 2007). Figure 10-38. Repair boundary recommendations for JRCP (NHI 2007). Figure 10-39. Repair boundary recommendations for CRCP (NHI 2007).
10-17. Key characteristics of concrete pavement patching. Conditions Addressed Contraindications Pavement Performance Indicators Affected Functional/Other Longitudinal cracking. Transverse cracking. Corner breaks. Joint spalling. Structural Adds some localized structural benefit. Significant structural failure. Materials-related distress (i.e., D-cracking or ASR). Extensive pavement deterioration, little remaining life. Additionally for repairs: Compressive stress buildup in long-jointed pavements. Dowel bar misalignment or lockup. Improper joint construction. Working cracks caused by shrinkage, fatigue, or foundation movement. + Joint load transfer efficiency (full-depth repairs only). + Load-related transverse slab cracking. + spalling. + Punchouts. +/– Smoothness. Expected Life Slab replacement: 10 to 15 years. Spall repair: 5 to 15 years. Additional Remarks For jointed pavements, in many cases it may be more cost effective and reliable to forgo repair for slab replacement. Special consideration should be given to defining repair boundaries, preparing the base, restoring joint load-transfer (full-depth repairs only), and finishing, texturing, and curing the patch. High early-strength concrete mixes may be an option when curing time is an issue. It is not desirable to create a large number of closely spaced joints in pavement such as would result from placing a number of closely spaced patches. Treatment can perform well in all climatic conditions. Capable of performing under all traffic conditions. Spall repair performance is closely related to bonding conditions: poorly bonded repairs have an extremely short life. Figure 10-37. Repair boundary recommendations for JPCP (NHI 2007). Figure 10-38. Repair boundary recommendations for JRCP (NHI 2007). Figure 10-39. Repair boundary recommendations for CRCP (NHI 2007).