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Publication Number: FHWA-RD-03-041

Evaluation and Analysis of LTPP Pavement Layer Thickness Data

Table 67 presents correlated groupings of "similar" materials used to correlate material codes from inventory and testing tables. The first two columns provide material codes and LTPP material descriptions used in the TST* tables. The second and third columns provided material codes and LTPP material descriptions used in the INV*, RHB*, and SPS* tables. The last column shows "similar" material descriptions developed in this study to link testing and inventory material codes.

 
Table 67. Correlated material codes.

TESTING

INVENTORY

ANALYSIS

TST

Code

LTPP Description

INV

Code

LTPP Description

"Similar" Material Description

333

Cement-treated Soil

42

Lime-Treated Subgrade Soil

Stabilized Subgrade Soil

338

Lime-Treated Soil

43

Cement-Treated Subgrade Soil

Stabilized Subgrade Soil

101

Fine-Grained Soils: Clay

   

Clayey Soils

102

Fine-Grained Soils: Lean Inorganic Clay

   

Clayey Soils

103

Fine-Grained Soils: Fat Inorganic Clay

   

Clayey Soils

104

Fine-Grained Soils: Clay with Gravel

   

Clayey Soils

105

Fine-Grained Soils: Lean Clay with Gravel

   

Clayey Soils

106

Fine-Grained Soils: Fat Clay with Gravel

   

Clayey Soils

107

Fine-Grained Soils: Clay with Sand

   

Clayey Soils

108

Fine-Grained Soils: Lean Clay with Sand

   

Clayey Soils

109

Fine-Grained Soils: Fat Clay with Sand

   

Clayey Soils

111

Fine-Grained Soils: Gravelly Lean Clay

   

Clayey Soils

112

Fine-Grained Soils: Gravelly Fat Clay

   

Clayey Soils

116

Fine-Grained Soils: Gravelly Clay with Sand

   

Clayey Soils

117

Fine-Grained Soils: Gravelly Lean Clay with Sand

   

Clayey Soils

118

Fine-Grained Soils: Gravelly Fat Clay with Sand

   

Clayey Soils

134

Fine-Grained Soils: Gravelly Silty Clay

   

Clayey Soils

135

Fine-Grained Soils: Sandy Silty Clay

   

Clayey Soils

136

Fine-Grained Soils: Gravelly Silty Clay with Sand

   

Clayey Soils

TESTING

INVENTORY

ANALYSIS

TST

Code

LTPP Description

INV

Code

LTPP Description

"Similar" Material Description

113

Fine-Grained Soils: Sandy Clay

52

Sandy Clay

Clayey Soils

114

Fine-Grained Soils: Sandy Lean Clay

   

Clayey Soils

115

Fine-Grained Soils: Sandy Fat Clay

   

Clayey Soils

119

Fine-Grained Soils: Sandy Clay with Gravel

   

Clayey Soils

120

Fine-Grained Soils: Sandy Lean Clay with Gravel

   

Clayey Soils

137

Fine-Grained Soils: Sandy Silty Clay with Gravel

   

Clayey Soils

131

Fine-Grained Soils: Silty Clay

53

Silty Clay

Clayey Soils

132

Fine-Grained Soils: Silty Clay with Gravel

   

Clayey Soils

   

51

Clay (Liquid Limit > 50)

Clayey Soils

133

Fine-Grained Soils: Silty Clay with Sand

   

Clayey Soils

216

Coarse-Grained Soil: Clayey Sand

60

Clayey Sand

Clayey Sand

217

Coarse-Grained Soil: Clayey Sand with Gravel

   

Clayey Sand

251

Coarse-Grained Soil: Gravel

61

Gravel

Gravel

266

Coarse-Grained Soil: Clayey Gravel

63

Clayey Gravel

Gravel

267

Coarse-Grained Soil: Clayey Gravel with Sand

   

Gravel

252

Coarse-Grained Soil: Poorly Graded Gravel

62

Poorly Graded Gravel

Gravel

253

Coarse-Grained Soil: Poorly Graded Gravel with Sand

   

Gravel

254

Coarse-Grained Ssoil: Poorly Graded Gravel with Silt

   

Gravel

255

Coarse-Grained Soil: Poorly Graded Gravel with Silt and Sand

   

Gravel

256

Coarse-Grained Soil: Poorly Graded Gravel with Clay

   

Gravel

257

Coarse-Grained Soil: Poorly Graded Gravel with Clay and Sand

   

Gravel

258

Coarse-Grained Soil: Well-Graded Gravel

   

Gravel

259

Coarse-Grained Soil: Well-Graded Gravel with Sand

   

Gravel

261

Coarse-Grained Soil: Well-Graded Gravel with Silt and Sand

   

Gravel

TESTING

INVENTORY

ANALYSIS

TST

Code

LTPP Description

INV

Code

LTPP Description

"Similar" Material Description

263

Coarse-Grained Soil: Well-Graded Gravel with Clay and Sand

   

Gravel

302

Gravel (Uncrushed)

22

Gravel (Uncrushed)

Gravel

308

Soil-Aggregate Mixture (Predominantly Coarse-Grained)

26

Soil-Aggregate Mixture (Predominantly Coarse-Grained Soil)

Gravel

303

Crushed Stone

   

Processed Granular Base Materials

304

Crushed Gravel

   

Processed Granular Base Materials

305

Crushed Slag

   

Processed Granular Base Materials

   

23

Crushed Stone, Gravel or Slag

Processed Granular Base Materials

162

Fine-Grained Soils: Organic Soil with Sand

   

Organic Soil

163

Fine-Grained Soils: Gravelly Organic Soil

   

Organic Soil

164

Fine-Grained Soils: Sandy Organic Soil

   

Organic Soil

280

Stone

   

Stone

283

Cobbles

   

Stone

282

Rock

65

Rock

Rock

287

Sandstone

   

Rock

   

64

Shale

Rock

294

Other (specify if possible or unknown)

   

Rock

337

Limerock, Caliche

41

Limerock, Caliche (Soft Carbonate Rock)

Limerock, Caliche

201

Coarse-Grained Soils: Sand

24

Sand

Sand

202

Coarse-Grained Soils: Poorly Graded Sand

58

Poorly Graded Sand

Sand

203

Coarse-Grained Soils: Poorly Graded Sand with Gravel

   

Sand

204

Coarse-Grained Soils: Poorly Graded Sand with Silt

   

Sand

205

Coarse-Grained Soils: Poorly Graded Sand with Silt and Gravel

   

Sand

206

Coarse-Grained Soils: Poorly Graded Sand with Clay

   

Sand

207

Coarse-Grained Soils: Poorly Graded Sand with Clay and Gravel

   

Sand

209

Coarse-Grained Soils: Well-Graded Sand with Gravel

   

Sand

TESTING

INVENTORY

ANALYSIS

TST

Code

LTPP Description

INV

Code

LTPP Description

"Similar" Material Description

210

Coarse-Grained Soils: Well-Graded Sand with Silt

   

Sand

211

Coarse-Grained Soils: Well-Graded Sand with Silt and Gravel

   

Sand

213

Coarse-Grained Soils: Well-Graded Sand with Clay and Gravel

   

Sand

   

59

Silty Sand

Sand

306

Sand

57

Sand

Sand

145

Fine-Grained Soils: Sandy Silt

55

Sandy Silt

Silty soils

147

Fine-Grained Soils: Sandy Silt with Gravel

   

Silty soils

141

Fine-Grained Soils: Silt

54

Silt

Silty soils

142

Fine-Grained Soils: Silt with Gravel

   

Silty soils

143

Fine-Grained Soils: Silt with Sand

   

Silty soils

144

Fine-Grained Soils: Gravelly Silt

   

Silty soils

146

Fine-Grained Soils: Gravelly Silt with Sand

   

Silty soils

148

Fine-Grained Soils: Clayey Silt

56

Clayey Silt

Silty soils

264

Coarse-Grained Soil: Silty Gravel

   

Silty gravel

265

Coarse-Grained Soil: Silty Gravel with Sand

   

Silty gravel

214

Coarse-Grained Soil: Silty Sand

   

Silty Sand

215

Coarse-Grained Soil: Silty Sand with Gravel

   

Silty Sand

307

Soil-Aggregate Mixture (Predominantly Fine-Grained)

25

Soil-Aggregate Mixture (Predominantly Fine-Grained Soil)

Subgrade soils

309

Fine-Grained Soils

   

Subgrade soils

310

Other (Specify if possible)

   

Subgrade soils

74

Woven Geotextile

74

Woven Geotextile

Geomaterials

75

Nonwoven Geotextile

75

Nonwoven Goetextile

Geomaterials

332

Econocrete

   

Econocrete

71

Chip Seal

71

Chip Seal Coat

Chip Seal

72

Slurry Seal

72

Slurry Seal Coat

Slurry Seal

73

Fog Seal

73

Fog Seal Coat

Fog Seal

82

Sand Seal

82

Sand Seal

Sand Seal

78

Dense-Graded Asphalt Concrete Interlayer

78

Dense-Graded Asphalt Concrete Interlayer

Dense-Graded, Cold-Laid AC

323

Dense-Graded, Cold-Laid, Central Plant Mix

29

Dense-Graded, Cold-Laid, Central Plant Mix

Dense-Graded, Cold-Laid AC

TESTING

INVENTORY

ANALYSIS

TST

Code

LTPP Description

INV

Code

LTPP Description

"Similar" Material Description

324

Dense-Graded, Cold-Laid, Mixed In-Place

30

Dense-Graded, Cold-Laid, Mixed In-Place

Dense-Graded, Cold-Laid AC

319

HMAC

   

HMAC

1

Hot-Mixed, Hot-Laid AC, Dense-Graded

1

Hot-Mixed, Hot-Laid Asphalt Concrete, Dense-Graded

Dense-Graded, Hot-Laid AC

322

Dense-Graded, Hot-Laid, Central Plant Mix

28

Dense-Graded, Hot-Laid, Central Plant Mix

Dense-Graded, Hot-Laid AC

2

Hot-Mixed, Hot-Laid AC, Open-Graded

2

Hot-Mixed, Hot-Laid Asphalt Concrete, Open-Graded (Porous Friction Course)

Open-Graded, Hot-Laid AC

325

Open-Graded, Hot-Laid, Central Plant Mix

31

Open-Graded, Hot-Laid, Central Plant Mix

Open-Graded, Hot-Laid AC

326

Open-Graded, Cold-Laid, Central Plant Mix

32

Open-Graded, Cold Laid, Central Plant Mix

Open-Graded, Cold-Laid AC

327

Open-Graded, Cold-Laid, Mixed In-Place

33

Open-Graded, Cold-Laid, Mixed In-Place

Open-Graded, Cold-Laid AC

10

Plant Mix (Cutback Asphalt) Material, Cold-Laid

10

Plant Mix (Cutback Asphalt) Material, Cold-Laid

Cutback Asphalt Mix

9

Plant Mix (Emulsified Asphalt) Material, Cold-Laid

9

Plant Mix (Emulsified Asphalt) Material, Cold-Laid

Emulsified Asphalt Mix

340

Pozzolanic-Aggregate Mixture

44

Pozzolanic-Aggregate Mixture

High-Strength Stabilized Bases

339

Soil Cement

27

Soil Cement

High-Strength Stabilized Bases

331

Cement Aggregate Mixture

37

Cement-Aggregate Mixture

High-Strength Stabilized Bases

16

Recycled AC, Heater Scarification/Recompaction

16

Recycled Asphalt Concrete Heater Scarification/Recompaction

Recycled AC, Heater Scarification/Recompaction

13

Recycled AC, Hot-Laid, Central Plant Mix

13

Recycled Asphalt Concrete Hot-Laid, Central Plant Mix

Recycled AC, Hot-Laid, Central Plant Mix

328

Recycled Asphalt Concrete, Plant Mix, Hot-Laid

34

Recycled Asphalt Concrete, Plant Mix, Hot-Laid

Recycled AC, Hot-Laid, Central Plant Mix

15

Recycled AC, Cold-Laid Mixed-In-Place

15

Recycled Asphalt Concrete, Cold-Laid, Mixed-In-Place

Recycled Asphalt Concrete, Mixed In-Place

   

36

Recycled Asphalt Concrete, Mixed In-Place

Recycled Asphalt Concrete, Mixed In-Place

84

Sand Asphalt

84

Sand Asphalt

Sand Asphalt

320

Sand Asphalt

46

Sand Asphalt

Sand Asphalt

321

Asphalt-Treated Mixture

   

Sand Asphalt

   

40

Sand-Shell Mixture

Sand-Shell Mixture


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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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