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