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Construction Program Management and Inspection Guide

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B–58 Appendix B: Quality Assurance Resources<br />

SAMPLE<br />

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

8.6.5 – Backfill Material for Pipes<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) A-1, A-2-4, or A-3<br />

Grain Size + 6.3 mm Sieve Per Per SC Per<br />

Analysis AASHTO AASHTO<br />

(AASHTO T311) - 6.3 mm Sieve M145 Per SC M145<br />

Ordinary Per<br />

Borrow Liquid Limit (AASHTO T89) - - AASHTO<br />

(M1.01.0) M145<br />

Plasticity Index (AASHTO T90) - -<br />

Per<br />

AASHTO<br />

M145<br />

Maximum Dry Density (Wdm ) SC - 5 kg/m 3<br />

Per SC SC + 5 kg/m 3<br />

(AASHTO T99, Method C)<br />

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

(AASHTO T99, Method C)<br />

Maximum Rock/Boulder Size - - 300 mm<br />

Maximum Lift Thickness - - 300 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 />

Continued on next page

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