CSA A23.4-A251 : 0

A23.4-00
Precast Concrete ù Materials and Construction
0. Introduction
    0.1 Guide for the Use of the Standard
    0.2 Guide for the Use of the Appendices
1. Scope
    1.1 General
    1.2 Shop Drawings
    1.3 Architectural Precast Concrete
    1.4 Precedence
    1.5 Mandatory Language
2. Definitions, Reference Publications, and Categories
    2.1 Definitions
    2.2 Reference Publications
    2.3 Categories
    2.4 Certification and Design Basis
    2.5 Design Basis
3. Cements, Supplementary Cementing Materials, and
    Colouring Materials
    3.1 General
    3.2 Colouring Materials
4. Water
5. Aggregates
    5.1 General
    5.2 Special Aggregate
6. Admixtures
    6.1 General
    6.2 Calcium Chloride
7. Reinforcement
8. Hardware and Miscellaneous Materials
    8.1 General
    8.2 Hardware
    8.3 Miscellaneous Materials
9. Storage of Materials
    9.1 General
    9.2 Hardware Materials
10. Tolerances
    10.1 General
    10.2 Tolerances for Structural Elements
    10.3 Wall Panels
    10.4 Other Tolerances
    10.5 Tolerances for Structures Erected from Precast
         Concrete Elements
    10.6 Tolerances in Joints between Architectural Wall
         Elements
11. Forms
    11.1 Forms for Precast Concrete
    11.2 Forms for Architectural Precast Concrete
    11.3 Forms for Structural Precast Concrete
    11.4 Forms for Internal Voids
    11.5 Preparation of Forms
12. Fabrication and Placement of Reinforcement
    12.1 General
    12.2 Placing Reinforcement
    12.3 Variations for Placing
    12.4 Welding of Reinforcement
    12.5 Concrete Cover
13. Placement of Hardware and Other Embedded Items
    13.1 General
    13.2 Tolerances for Placing Hardware
    13.3 Lifting and Handling Hardware
14. Mix Proportions
    14.1 General
    14.2 Architectural Concrete
    14.3 Veneered Construction
15. Durability
16. Specifying Concrete
17. Concrete Quality
    17.1 General
    17.2 Air Content ù Frequency and Number of Tests
    17.3 Compressive Strength ù Frequency and Number of
         Tests
    17.4 Absorption ù Frequency and Number of Tests
    17.5 Accelerated Curing Tests
    17.6 Intermediate Strength Levels
    17.7 Low-Density Concrete
    17.8 No-Slump Concrete
    17.9 Low-Permeability Concrete
18. Production of Concrete
    18.1 General
    18.2 Mixers
    18.3 Colouring Materials
    18.4 Control of Slump and Air Content
19. Placing of Concrete
    19.1 General
    19.2 Depositing
    19.3 Consolidation
    19.4 Removal of Paste
20. Construction Joints
21. Curing and Protection
    21.1 General
    21.2 Initial Curing
    21.3 Extended Curing
22. Treatment of Unformed Surfaces
    22.1 General
    22.2 Composite Construction
23. Toppings
24. Finishing of Formed Surfaces
    24.1 General
    24.2 Finish Grades
25. Surface Sealers and Joint Sealants
26. Prestressing
    26.1 Post-tensioning
    26.2 Pretensioning
27. Stripping and Handling
28. Storage
29. Transportation
30. Erection
31. Joints
32. Repairs
    32.1 General
    32.2 Cosmetic Repairs
    32.3 Structural Repairs
Appendices
A ù Responsibilities
B ù Scope of Work
C Architectural Precast Concrete-Materials and finishes
A251-00
Qualification Code for Architectural and Structural Precast
Concrete Products
1. Scope
2. Definitions and Reference Publications
    2.1 Definitions
    2.2 Reference Publications
3. Program Requirements
4. Certificate of Qualification
5. General Requirements
6. Compliance Control (Quality Assurance) Requirements
    6.1 General
    6.2 Quality Records
7. Key Personnel
    7.1 Individual Responsible for the Quality Assurance
         Program
    7.2 Plant Engineer
8. Certification Program Implementation
    8.1 Phases
    8.2 Statement of Compliance
    8.3 Phase I ù Application/Qualification Questionnaire
    8.4 Phase II ù Plant Audit and Qualification
    8.5 Phase III ù Follow-up Inspections/Audits
9. Assessment and Audit
10. Nonconformance
11. Cancellation of Certification

Gives a means for qualifying manufacturers who fabricate architectural and structural precast concrete to the requirements.