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Construction Program Management and Inspection Guide

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SAMPLE<br />

8.6.5 – Backfill Material for Pipes (Continued from page B-58)<br />

Appendix B: Quality Assurance Resources<br />

CONSTRUCTION PROGRAM MANAGEMENT AND INSPECTION GUIDE (5/01/04)<br />

Targets <strong>and</strong> Engineering Limits<br />

Lower Upper<br />

Engineering Engineering<br />

Material Type(s) Quality Characteristic Limit Target Limit<br />

Soil Classification (AASHTO M145) Hard, durable stone <strong>and</strong> s<strong>and</strong> per M1.03.0<br />

12.5 mm Sieve 50 Per SC 85<br />

Gradation 4.75 mm Sieve 40 Per SC 75<br />

(AASHTO T11)<br />

(AASHTO T27)<br />

300 µm Sieve 8 Per SC 28<br />

75 µm Sieve 0 Per SC 10<br />

Gravel Plasticity Index (AASHTO T90) N.P. N.P. N.P.<br />

Borrow<br />

Maximum Dry Density (Wdm ) SC - 5 kg/m3 Per SC SC + 5 kg/m3 (M1.03.0)<br />

(AASHTO T180, Method D)<br />

Optimum Moisture Content (W mo ) SC - 2% Per SC SC + 2%<br />

(AASHTO T180, Method D)<br />

Maximum Stone Size - - 75 mm<br />

Maximum Lift Thickness - - 150 mm<br />

In-Place Density 95% W dm 100% W dm -<br />

(AASHTO T310, Method B)<br />

In-Place Moisture Content W mo - 2% (W mo ) W mo + 2%<br />

(AASHTO T310, Method B)<br />

B–59

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