Guideline for the Preparation of Road Structure Durability Plans Bridge Asset Management, Structures Division Guideline for the Preparation of Road Structure Durability Plans Engineering & Technology Table of Contents Executive Summary.......................................................................................................................................iii Glossary..........................................................................................................................................................iv 1 Introduction............................................................................................................................................1-1 1.1 General..........................................................................................................................................1-1 1.2 Asset Performance........................................................................................................................1-1 1.3 Guideline Structure .......................................................................................................................1-1 1.4 Scope ............................................................................................................................................1-3 1.5 Submission of Durability Plans .....................................................................................................1-3 2 Content of Durability Plan Report .......................................................................................................2-1 2.1 General..........................................................................................................................................2-1 2.2 Overview of Durability Design.......................................................................................................2-1 2.3 Durability Plan Report Introduction ...............................................................................................2-4 2.4 Service Life Criteria (Table 1) .......................................................................................................2-5 2.4.1 Structure Components ......................................................................................................2-5 2.4.2 Durability Limit States .......................................................................................................2-5 2.5 Exposure Conditions (Table 2) .....................................................................................................2-6 2.5.1 Classification of Environment Conditions in Design Standards........................................2-6 2.5.2 Macro Environments .........................................................................................................2-7 2.5.3 Define Deterioration Mechanisms.....................................................................................2-9 2.6 Assessment of Design Solutions (Table 3)...................................................................................2-9 2.6.1 Identify Protective or Mitigation Measures......................................................................2-10 2.6.2 Durability Design in Standards .......................................................................................2-10 2.6.3 Durability Modelling.........................................................................................................2-10 2.6.4 Component Inspection & Replacement ..........................................................................2-11 2.6.5 Detailing ..........................................................................................................................2-11 2.6.6 DTMR Standards and Standard Details .........................................................................2-13 2.6.7 Construction Issues ........................................................................................................2-14 2.6.8 Control of Early Age Thermal Cracking in Concrete ......................................................2-14 2.6.9 Safety Review of Inspection & Replacement Activities ..................................................2-15 2.7 Maintenance & Servicing Assumptions (Table 4) .......................................................................2-15 2.8 Routine Inspection (Table 5).......................................................................................................2-16 2.8.1 Access.............................................................................................................................2-16 2.8.2 Condition State Guidelines .............................................................................................2-16 2.9 Replacement of Components (Table 6) ......................................................................................2-17 2.9.1 Bearings..........................................................................................................................2-17 2.10 Construction Phase Durability Plan Compliance (Table 8).........................................................2-17 2.10.1 General ...........................................................................................................................2-18 2.10.2 Durability Critical Processes (Table 8)............................................................................2-18 2.10.3 Verification Procedures and Tests..................................................................................2-18 2.10.4 Defects and Treatment Records.....................................................................................2-19 3 Durability Plan Verification Report......................................................................................................3-1 3.1 Submission Requirements ............................................................................................................3-1 3.2 As Built Records............................................................................................................................3-1 3.2.1 Amendments to the design ...............................................................................................3-1 3.2.2 As Built Drawings..............................................................................................................3-1 October 2009 i Bridge Asset Management, Structures Division Guideline for the Preparation of Road Structure Durability Plans Engineering & Technology 3.2.3 Construction Records .......................................................................................................3-1 3.2.4 Durability Verification Report (Table 8).............................................................................3-1 3.2.5 Level 2 Inspection Report .................................................................................................3-2 3.2.6 Photographic Records ......................................................................................................3-2 3.3 Materials and Proprietary Product Details (Table 7).....................................................................3-2 3.3.1 Precast concrete components ..........................................................................................3-2 3.3.2 Data sheets.......................................................................................................................3-2 3.3.3 Warranties.........................................................................................................................3-2 4 Durability Design Summary Tables.....................................................................................................4-1 4.1 General..........................................................................................................................................4-1 4.2 Structure Durability Outline: Table 1 .............................................................................................4-1 4.3 Component Exposure Assessment: Table 2.................................................................................4-1 4.4 Durability Provisions for Critical Components: Table 3.................................................................4-1 4.5 Maintenance Intervention Assumptions: Table 4 ..........................................................................4-1 4.6 Inspection & Access Provisions: Table 5......................................................................................4-1 4.7 Replacement of Components: Table 6 .........................................................................................4-1 4.8 Proprietary Products Record: Table 7...........................................................................................4-2 4.9 Construction Phase Departures: Table 8......................................................................................4-2 4.10 Summary of Submission Requirements........................................................................................4-2 4.10.1 Concept Design ................................................................................................................4-2 4.10.2 Detailed Design.................................................................................................................4-2 4.10.3 During Construction ..........................................................................................................4-2 4.10.4 Construction Verification Report .......................................................................................4-2 5 Reference Documents