Con Pave Man July 04
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NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
CONCRETE PAVEMENT SURVEY MANUAL 2004
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
This manual has been developed to assist North Carolina Division of Highways’ personnel in conducting a condition survey of the concrete pavements in North Carolina. The survey is a 20% sample survey. The first .20 mile (CRC) or first 41 slabs (JCP) are rated. The manual is divided into four sections as follows: A)
GENERAL 1) 2) 3) 4) 5) 6) 7)
B)
Concrete Patches Asphalt Patches Longitudinal Cracking Transverse Cracking Corner Breaks Spalling Joint Seal Damage Faulting
Page 12 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18
CONTINUOUS REINFORCED CONCRETE PAVEMENTS 1) 2) 3) 4) 5) 6) 7)
D)
Page 2 Page 2 Page 6 Page 7 Page 9 Page 10 Page 11
JOINTED CONCRETE PAVEMENTS 1) 2) 3) 4) 5) 6) 7) 8)
C)
Shoulder Type Shoulder Condition Shoulder-Lane Drop-off Shoulder-Lane Joint Seal Surface Wear Pumping Ride Quality
Concrete Patches Asphalt Patches Longitudinal Cracking Transverse Cracking Punch Outs Narrow Cracks Y – Cracks
Page 19 Page 19 Page 21 Page 22 Page 23 Page 24 Page 24
RATING FORMS 1) 2)
Jointed Concrete Pavement Continuous Reinforced Concrete Pavement
1
Page 25 Page 26
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
A)
GENERAL 1)
Shoulder Type – 1st line – paved, 2nd line – unpaved P – Plant Mix, S – Slurry, C – Concrete, U – Unpaved
2)
Shoulder Condition Paved Shoulder – plant mix, slurry or BST L: M: S:
Overall good condition, edge intact with no cracking Acceptable condition; some cracking present up to ¼” wide, less than ½” rutting, outside edge stable although may begin to break away in spots. Unacceptable condition; cracking greater than ¼”, edge breaking away over a large part of section; rutting greater than ½”.
Low Severity Asphalt Shoulder
2
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Moderate Severity Asphalt Shoulder
High Severity Asphalt Shoulder
3
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Paved shoulder – concrete L: M: S:
Shoulder condition basically in good shape with little or no problems; no cracking or faulting. Cracks 1/8” wide or less’ light to moderate spalling, material is stable. Cracks over 1/8” wide, unstable material, faulting greater than ¼”.
Low Severity Concrete Shoulder
Moderate Severity Concrete Shoulder
High Severity Concrete Shoulder
4
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Unpaved shoulder L: M: S:
Little or no erosion evident; thick vegetation cover. Thin vegetation with some bare spots; shallow erosion channel may be present. Sparse vegetation; deep erosion channels, ruts greater than 1 inch.
Low Severity Unpaved Shoulder
Moderate Severity Unpaved Shoulder
High Severity Unpaved Shoulder
5
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
3)
Shoulder – Lane Drop-off Description: difference in elevation between edge of slab and outside shoulder. L: M: S:
Shoulder drop-off less than ¼ inch. Shoulder drop-off ¼ to ½ inch. Shoulder drop-off greater than ½ inch.
Low Severity Shoulder – Lane Drop Off
Moderate Severity Shoulder – Lane Drop Off
High Severity Shoulder – Lane Drop Off
6
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
4)
Shoulder – Lane Joint Seal Description: widening of the joint between the edge of slab and outside shoulder. Asphalt shoulder L: M: S:
Joint seal failure, less than ¼” opening between lane and shoulder. Joint seal failure, ¼” to ½” opening between lane and shoulder. Joint seal failure, over ½” opening between lane and shoulder.
Concrete shoulder L: M: S:
Joint seal failed at isolated locations. Joint seal failed 25% to 50% of the joint. Joint seal failed over 50% of the joint.
Low Severity Shoulder – Lane Joint Seal Asphalt Shoulder
High Severity Shoulder – Lane Joint Seal Asphalt Shoulder
7
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Low Severity Shoulder – Lane Joint Seal Concrete Shoulder
High Severity Shoulder – Lane Joint Seal Concrete Shoulder
8
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
5)
Surface Wear – Percent of area Description: Surface mortar and texture worn away to expose coarse aggregate (polished). Small pieces of pavement broken loose from the surface (popouts). L: M: S:
Texture worn away with less than 25% of aggregate visible. Small popouts may be visible. Texture worn away showing 25% to 50% of aggregate. Small extensive popouts may be present. Texture worn away showing more than 50% of aggregate. Large extensive popouts may be present.
Low Severity Surface Wear
Moderate Severity Surface Wear
High Severity Surface Wear
9
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
6) Pumping – Number of joints or areas Description: Seeping or ejection of water from beneath the pavement through cracks or joints. Fine material may be present near joints or cracks staining the surface and there may also be depressions.
10
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
7)
Ride Quality – Percent of area Description: Ride quality is what the general public perceives as an indicator of how well a road is performing. The average operating speed is the speed at which most drivers would travel a section of road. L: M: S:
Operating speed easy to maintain. A few bumps and dips (up to 25% of section). Joints are fairly smooth. Slightly difficult to maintain safe operating speed. Some joints appear to be faulted. Joints or cracks cause bumps and unevenness. Difficult to maintain safe operating speed. Most joints severely faulted. Cracks cause unevenness and surface may be broken, cracked or worn away.
Low Severity Ride Quality
High Severity Ride Quality
11
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
B)
JOINTED CONCRETE PAVEMENTS 1)
Concrete Patches – Number of slabs patched with concrete.
2)
Asphalt patches – Number of slabs patched with asphalt. Description: A portion or all of the original concrete slab that has been removed and replaced with additional material after original construction.
Concrete Patch
Asphalt Patch
12
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
3)
Longitudinal Cracking – Number of slabs with longitudinal cracking Description: Cracks that are predominantly parallel to the pavement centerline. L: M: S:
Crack widths less than 1/8 inch, no spalling or faulting. Crack widths from 1/8 to 1/2 inch, or with spalling less than 3 inches, or faulting up to 1/2 inch, may be sealed. Crack widths greater than 1/2 inch, or with spalling greater than 3 inches, or faulting greater than 1/2 inch.
Low Severity Longitudinal Cracking
Moderate Severity Longitudinal Cracking
High Severity Longitudinal Cracking
13
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
4)
Transverse Cracking – Number of slabs with transverse cracks Description: Cracks that are predominantly perpendicular to the pavement centerline. L: M: S:
Crack widths less than 1/8 inch, no spalling, no faulting Crack widths from 1/8 to 1/2 inch, or with spalling less than 3 inches, or faulting up to 1/4 inch, may be sealed. Crack widths greater than 1/2 inch, or with spalling greater than 3 inches, or faulting greater than 1/4 inch.
Low Severity Transverse Cracking
Moderate Severity Transverse Cracking
High Severity Transverse Cracking
14
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
5)
Corner Breaks – Number of slabs with corner breaks Description: A portion of the slab separated by a crack which intersects the adjacent transverse and longitudinal joints, approximately at a 45 degree angle. The length of the sides is from 1 ft. to 1/2 the width of the slab, on each side of the corner. L: M: S:
Crack well sealed or hairline, no faulting or spalling, no break-up. Crack spalled at low to moderate severity, faulting less than 1/2 inch, no pieces broken. Crack spalled at moderate to severe severity, faulting greater than 1/2 inch, broken into two or more pieces.
Low Severity Corner Break
Moderate Severity Corner Break
High Severity Corner Break
15
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
6)
Spalling – Number of slabs with spalls Description: Cracking, breaking, or chipping of slab edges within 2 feet of joint. L: M: S:
Spalls less than 3 inches wide with loss of material, or spalls with no loss of material and no patching. Spalls from 3 to 6 inches wide with loss of material. Spalls greater than 6 inches wide with loss of material.
Low Severity Spalling
Moderate Severity Spalling
High Severity Spalling
16
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
7)
Joint Seal Damage – Number of joints with joint seal damage Description: Condition which enables materials or water to infiltrate the joint. Also, includes extrusion, hardening, adhesive failure, cohesive failure or complete loss of sealant. L: M: S:
Joint seal damage exists in less than 10% of the joint. Joint seal damage exists in 10% to 50% of the joint. Joint seal damage exists in more than 50% of the joint.
Low Severity Joint Seal Damage
Moderate Severity Joint Seal Damage
High Severity Joint Seal Damage
17
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
8)
Faulting of Transverse Joints – Average of faulting (inches) in section Description: Difference in elevation across the transverse joint.
18
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
C)
CONTINUOUS REINFORCED CONCRETE PAVEMENTS 1)
Concrete Patches – Number of concrete patches in section Good: Patch with no cracks, spalls or movement. Fair: Patch starting to spall, crack and shows movement. Poor: Patch broken and may have loss of material..
1)
Asphalt Patches - Number of asphalt patches in section
Good Concrete Patch
Fair Concrete Patch
19
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Poor Concrete Patch
Asphalt Patch
20
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
2)
Longitudinal Cracking – Length of longitudinal cracks in section L: M: S:
Crack not open, less than 1/8 inch wide, no spalling or faulting. Crack widths from 1/8 to 1/2 inch, or with spalling less than 3 inches, or faulting up to 1/2 inch, may be sealed. Crack widths more than 1/2 inch, or with spalling greater than 3 inches, or faulting greater than 1/2 inch.
Low Severity Longitudinal Cracking
Moderate Severity Longitudinal Cracking
High Severity Longitudinal Cracking 21
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
3)
Transverse Cracking – Number of transverse cracks in section L: M: S:
Crack width less than 1/8 inch wide, or spalled less than 10% of length. (Do not rate the light cracks) Crack width from 1/8 to 1/2 inch wide, or spalled from 10 to 50% of length, may be sealed. Crack width more than 1/2 inch, or spalled more than 50% of length.
Low Severity Transverse Cracking
Moderate Severity Transverse Cracking
High Severity Transverse Cracking
22
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
5)
Punchouts – Number of punchouts in section Description: The area enclosed by two closely spaced transverse cracks, a short longitudinal crack and the edge of pavement or a longitudinal joint. Also includes “Y” cracks that are spalled, breaking up and faulted. L: M: S:
Boundary of punchout is well defined but still has good aggregate interlock, cracks are tight and no spalling around boundary. Boundary of punchout is spalled, has faulting and shows signs of movement. Loss of material and developing secondary cracks.
Low Severity Punchout
Moderate Severity Punchout
High Severity Punchout
23
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
6)
Narrow Cracks – Number of narrow cracks in section Description: Area where transverse crack spacing is less than 24 inches.
7)
“Y” Cracks – Number of “Y” cracks in section Description: Area where two transverse cracks merge into one.
24
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
25
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
26
CONCRETE PAVEMENT SURVEY MANUAL 2004
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
This manual has been developed to assist North Carolina Division of Highways’ personnel in conducting a condition survey of the concrete pavements in North Carolina. The survey is a 20% sample survey. The first .20 mile (CRC) or first 41 slabs (JCP) are rated. The manual is divided into four sections as follows: A)
GENERAL 1) 2) 3) 4) 5) 6) 7)
B)
Concrete Patches Asphalt Patches Longitudinal Cracking Transverse Cracking Corner Breaks Spalling Joint Seal Damage Faulting
Page 12 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18
CONTINUOUS REINFORCED CONCRETE PAVEMENTS 1) 2) 3) 4) 5) 6) 7)
D)
Page 2 Page 2 Page 6 Page 7 Page 9 Page 10 Page 11
JOINTED CONCRETE PAVEMENTS 1) 2) 3) 4) 5) 6) 7) 8)
C)
Shoulder Type Shoulder Condition Shoulder-Lane Drop-off Shoulder-Lane Joint Seal Surface Wear Pumping Ride Quality
Concrete Patches Asphalt Patches Longitudinal Cracking Transverse Cracking Punch Outs Narrow Cracks Y – Cracks
Page 19 Page 19 Page 21 Page 22 Page 23 Page 24 Page 24
RATING FORMS 1) 2)
Jointed Concrete Pavement Continuous Reinforced Concrete Pavement
1
Page 25 Page 26
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
A)
GENERAL 1)
Shoulder Type – 1st line – paved, 2nd line – unpaved P – Plant Mix, S – Slurry, C – Concrete, U – Unpaved
2)
Shoulder Condition Paved Shoulder – plant mix, slurry or BST L: M: S:
Overall good condition, edge intact with no cracking Acceptable condition; some cracking present up to ¼” wide, less than ½” rutting, outside edge stable although may begin to break away in spots. Unacceptable condition; cracking greater than ¼”, edge breaking away over a large part of section; rutting greater than ½”.
Low Severity Asphalt Shoulder
2
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Moderate Severity Asphalt Shoulder
High Severity Asphalt Shoulder
3
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Paved shoulder – concrete L: M: S:
Shoulder condition basically in good shape with little or no problems; no cracking or faulting. Cracks 1/8” wide or less’ light to moderate spalling, material is stable. Cracks over 1/8” wide, unstable material, faulting greater than ¼”.
Low Severity Concrete Shoulder
Moderate Severity Concrete Shoulder
High Severity Concrete Shoulder
4
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Unpaved shoulder L: M: S:
Little or no erosion evident; thick vegetation cover. Thin vegetation with some bare spots; shallow erosion channel may be present. Sparse vegetation; deep erosion channels, ruts greater than 1 inch.
Low Severity Unpaved Shoulder
Moderate Severity Unpaved Shoulder
High Severity Unpaved Shoulder
5
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
3)
Shoulder – Lane Drop-off Description: difference in elevation between edge of slab and outside shoulder. L: M: S:
Shoulder drop-off less than ¼ inch. Shoulder drop-off ¼ to ½ inch. Shoulder drop-off greater than ½ inch.
Low Severity Shoulder – Lane Drop Off
Moderate Severity Shoulder – Lane Drop Off
High Severity Shoulder – Lane Drop Off
6
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
4)
Shoulder – Lane Joint Seal Description: widening of the joint between the edge of slab and outside shoulder. Asphalt shoulder L: M: S:
Joint seal failure, less than ¼” opening between lane and shoulder. Joint seal failure, ¼” to ½” opening between lane and shoulder. Joint seal failure, over ½” opening between lane and shoulder.
Concrete shoulder L: M: S:
Joint seal failed at isolated locations. Joint seal failed 25% to 50% of the joint. Joint seal failed over 50% of the joint.
Low Severity Shoulder – Lane Joint Seal Asphalt Shoulder
High Severity Shoulder – Lane Joint Seal Asphalt Shoulder
7
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Low Severity Shoulder – Lane Joint Seal Concrete Shoulder
High Severity Shoulder – Lane Joint Seal Concrete Shoulder
8
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
5)
Surface Wear – Percent of area Description: Surface mortar and texture worn away to expose coarse aggregate (polished). Small pieces of pavement broken loose from the surface (popouts). L: M: S:
Texture worn away with less than 25% of aggregate visible. Small popouts may be visible. Texture worn away showing 25% to 50% of aggregate. Small extensive popouts may be present. Texture worn away showing more than 50% of aggregate. Large extensive popouts may be present.
Low Severity Surface Wear
Moderate Severity Surface Wear
High Severity Surface Wear
9
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
6) Pumping – Number of joints or areas Description: Seeping or ejection of water from beneath the pavement through cracks or joints. Fine material may be present near joints or cracks staining the surface and there may also be depressions.
10
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
7)
Ride Quality – Percent of area Description: Ride quality is what the general public perceives as an indicator of how well a road is performing. The average operating speed is the speed at which most drivers would travel a section of road. L: M: S:
Operating speed easy to maintain. A few bumps and dips (up to 25% of section). Joints are fairly smooth. Slightly difficult to maintain safe operating speed. Some joints appear to be faulted. Joints or cracks cause bumps and unevenness. Difficult to maintain safe operating speed. Most joints severely faulted. Cracks cause unevenness and surface may be broken, cracked or worn away.
Low Severity Ride Quality
High Severity Ride Quality
11
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
B)
JOINTED CONCRETE PAVEMENTS 1)
Concrete Patches – Number of slabs patched with concrete.
2)
Asphalt patches – Number of slabs patched with asphalt. Description: A portion or all of the original concrete slab that has been removed and replaced with additional material after original construction.
Concrete Patch
Asphalt Patch
12
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
3)
Longitudinal Cracking – Number of slabs with longitudinal cracking Description: Cracks that are predominantly parallel to the pavement centerline. L: M: S:
Crack widths less than 1/8 inch, no spalling or faulting. Crack widths from 1/8 to 1/2 inch, or with spalling less than 3 inches, or faulting up to 1/2 inch, may be sealed. Crack widths greater than 1/2 inch, or with spalling greater than 3 inches, or faulting greater than 1/2 inch.
Low Severity Longitudinal Cracking
Moderate Severity Longitudinal Cracking
High Severity Longitudinal Cracking
13
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
4)
Transverse Cracking – Number of slabs with transverse cracks Description: Cracks that are predominantly perpendicular to the pavement centerline. L: M: S:
Crack widths less than 1/8 inch, no spalling, no faulting Crack widths from 1/8 to 1/2 inch, or with spalling less than 3 inches, or faulting up to 1/4 inch, may be sealed. Crack widths greater than 1/2 inch, or with spalling greater than 3 inches, or faulting greater than 1/4 inch.
Low Severity Transverse Cracking
Moderate Severity Transverse Cracking
High Severity Transverse Cracking
14
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
5)
Corner Breaks – Number of slabs with corner breaks Description: A portion of the slab separated by a crack which intersects the adjacent transverse and longitudinal joints, approximately at a 45 degree angle. The length of the sides is from 1 ft. to 1/2 the width of the slab, on each side of the corner. L: M: S:
Crack well sealed or hairline, no faulting or spalling, no break-up. Crack spalled at low to moderate severity, faulting less than 1/2 inch, no pieces broken. Crack spalled at moderate to severe severity, faulting greater than 1/2 inch, broken into two or more pieces.
Low Severity Corner Break
Moderate Severity Corner Break
High Severity Corner Break
15
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
6)
Spalling – Number of slabs with spalls Description: Cracking, breaking, or chipping of slab edges within 2 feet of joint. L: M: S:
Spalls less than 3 inches wide with loss of material, or spalls with no loss of material and no patching. Spalls from 3 to 6 inches wide with loss of material. Spalls greater than 6 inches wide with loss of material.
Low Severity Spalling
Moderate Severity Spalling
High Severity Spalling
16
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
7)
Joint Seal Damage – Number of joints with joint seal damage Description: Condition which enables materials or water to infiltrate the joint. Also, includes extrusion, hardening, adhesive failure, cohesive failure or complete loss of sealant. L: M: S:
Joint seal damage exists in less than 10% of the joint. Joint seal damage exists in 10% to 50% of the joint. Joint seal damage exists in more than 50% of the joint.
Low Severity Joint Seal Damage
Moderate Severity Joint Seal Damage
High Severity Joint Seal Damage
17
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
8)
Faulting of Transverse Joints – Average of faulting (inches) in section Description: Difference in elevation across the transverse joint.
18
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
C)
CONTINUOUS REINFORCED CONCRETE PAVEMENTS 1)
Concrete Patches – Number of concrete patches in section Good: Patch with no cracks, spalls or movement. Fair: Patch starting to spall, crack and shows movement. Poor: Patch broken and may have loss of material..
1)
Asphalt Patches - Number of asphalt patches in section
Good Concrete Patch
Fair Concrete Patch
19
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
Poor Concrete Patch
Asphalt Patch
20
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
2)
Longitudinal Cracking – Length of longitudinal cracks in section L: M: S:
Crack not open, less than 1/8 inch wide, no spalling or faulting. Crack widths from 1/8 to 1/2 inch, or with spalling less than 3 inches, or faulting up to 1/2 inch, may be sealed. Crack widths more than 1/2 inch, or with spalling greater than 3 inches, or faulting greater than 1/2 inch.
Low Severity Longitudinal Cracking
Moderate Severity Longitudinal Cracking
High Severity Longitudinal Cracking 21
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
3)
Transverse Cracking – Number of transverse cracks in section L: M: S:
Crack width less than 1/8 inch wide, or spalled less than 10% of length. (Do not rate the light cracks) Crack width from 1/8 to 1/2 inch wide, or spalled from 10 to 50% of length, may be sealed. Crack width more than 1/2 inch, or spalled more than 50% of length.
Low Severity Transverse Cracking
Moderate Severity Transverse Cracking
High Severity Transverse Cracking
22
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
5)
Punchouts – Number of punchouts in section Description: The area enclosed by two closely spaced transverse cracks, a short longitudinal crack and the edge of pavement or a longitudinal joint. Also includes “Y” cracks that are spalled, breaking up and faulted. L: M: S:
Boundary of punchout is well defined but still has good aggregate interlock, cracks are tight and no spalling around boundary. Boundary of punchout is spalled, has faulting and shows signs of movement. Loss of material and developing secondary cracks.
Low Severity Punchout
Moderate Severity Punchout
High Severity Punchout
23
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
6)
Narrow Cracks – Number of narrow cracks in section Description: Area where transverse crack spacing is less than 24 inches.
7)
“Y” Cracks – Number of “Y” cracks in section Description: Area where two transverse cracks merge into one.
24
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
25
NORTH CAROLINA DIVISION OF HIGHWAYS CONCRETE PAVEMENT CONDITION SURVEY
26
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