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This document addresses materials and quality considerations when using cast-in-place, normal-weight, high-strength concrete in structures
that must be designed for moderate to high seismic applications. The term
“high-strength concrete,” as defined by ACI Committee 363, refers to
concrete having a specified compressive strength for design of 8000 psi (55 MPA) or greater.
The lower 6000 psi (41 MPa) threshold, however, was chosen for
the ITG-4 document because it deals with a specialized application of
high-strength concrete application in areas of moderate to high seismicity. An
accompanying standard, ITG-4.1 (available Spring 2007), is written in mandatory
language in a format that can be adopted by local jurisdictions, and will allow
building officials to approve the use of high-strength concrete on projects that
are being constructed under the provisions of ACI 301 and 318. ITG-4.2R is the
supporting document for that standard. ITG 4 has also developed another
non-mandatory language document: ITG-4.3R (available Spring 2007). It addresses
structural design and detailing considerations. 30 pp.
ACI - ITG 4.2R-06 Materials and Quality Considerations for High-Strength Concrete in Moderate to High Seismic Applications
- Table of Contents:
Introduction
Background
Scope
Preamble
Glossary of terms
Properties of high-strength concrete
Mechanical properties
Durability properties
Constructibility properties
Raw materials
Mixture proportioning
Required strength
Water-cementitious material ratio
Cementitious materials content
Air entrainment
Aggregates
Supplementary cementitious materials
Chemical admixtures
Combinations of supplementary cementitious materials and chemical admixtures
Proportioning for workability
Trial batches
Mixture submittal requirements
Preconstruction meetings
Batching
Transportation
Placement
Ordering
Raw materials handling
Production and delivery
Concrete temperature control
Placement, consolidation, and finishing
Curing
Raw material sampling and testing
Sampling method
Sample identification
Testing
Concrete sampling and testing
Sampling and testing schedule
Summary and recommendations
Raw materials
Mixture proportioning
Mixture submittal requirements
Preconstruction meetings
Ordering
Raw materials handling
Production and delivery
Concrete temperature control
Placement, consolidation, and finishing
Curing
Raw materials sampling and testing
Concrete sampling and testing
References
Referenced standards and reports
Cited references
Appendix-Sample agenda for preconstruction
Meeting concerning high-strength concrete
ACI - ITG 4.2R-06 Materials and Quality Considerations for High-Strength Concrete in Moderate to High Seismic Applications
ACI - ITG 4.2R-06 Materials and Quality Considerations for High-Strength Concrete in Moderate to High Seismic Applications
Item#: 180-4206-06
Publisher: ACI
ACI - ITG 4.2R-06 Materials and Quality Considerations for High-Strength Concrete in Moderate to High Seismic Applications
