1. Elements of a Good Concrete Pipe Specification David JP Matocha Technical Resource Manager Hanson Pipe & Precast

2. 2 A buried pipeline is a Structural System This structural system must consider both the Properties of the Pipe and the Properties of the Soil…

3. 3 “READERS DIGEST Version”  Model “Outline” Specification (Handout) based upon AASHTO Section 27 – Concrete Pipe 27.1 – General (Design) 27.2 – Working Drawings 27.3 – Materials 27.4 – Assembly 27.5 – Installation 27.6 – Inspection 27.7 – Measurement 27.8 - Payment

4. 4 AASHTO Section 27 – 27.1 General

5. 5 Section 12 Bridge design… Sets forth all LRFD (Load and Resistance Factor Design) design criteria for RCP  Allows Indirect Design and or Direct Design for RCP  Recommend using direct design for deep fills not listed in ACPA Fill Height Charts

6. 6 Indirect Design  Calculate LRFD live load, dead load, fluid load  Takes soil/installation contribution into consideration  Calculate load on pipe in lbs/ dia (ft) / length(ft)  Determines strength class of pipe required (ASTM C-76)  Steel areas and concrete compressive strength set forth in AASHTO M 170/ASTM C-76

7. 7 Tools for Structural Pipe Design

8. 8 AASHTO Section 27 – 27.3 MATERIALS Pipe Manufacturing Materials Joint Materials

9. 9 27.3 Pipe Manufacturing Material Specifications

10. 10 Joint Materials in 27.3  Cement Mortar – soil tight  Other Joint Materials (Mastic) – soil or silt tight (horizontal) leak resistant (vertical)  Flexible watertight (Rubber Gasket) – silt tight or leak resistant

11. 11 AASHTO Joint Selection Criteria = performance parameters divided into a hierarchy with 4 main sub- groups: Special Design (Water Tight) Leak Resistant Silt Tight Soil Tight ***AASHTO PP 63-09*** Pipe Joint Performance Parameters

12. 12

13. 13 AASHTO Section 27 – 27.5 Installation 27.5 Installation – Contents….. Bedding & Backfill Materials Compaction Requirements Type I – Type IV Standard Installations

14. 14

15. 15

16. 16 $ $ $$ $$ High Quality Fill High Compaction Levels Inspection Lower Pipe Strengths Type 1 Installation

17. 17 Type 1 Installation

18. 18

19. 19 $ $ $ $ $ $ $ $ $ $ $ $ Type 4 Installation Native Soils Limited Compaction Required No Inspection High Pipe Strengths

20. 20 Type 4 Installation

21. 21

22. 22 AASHTO Section 27 – 27.6 Field Inspection 27.6 Inspection – Contents….. Misalignment Cracks Spalls & Slabing