The Concrete Convention
and Exposition
New Business-What’s Next for ACI 301?
Presented by:Michelle L. Wilson, FACI
Director, Concrete Technology
ACI 301-16 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Quest for Perfection
ACI 301 Specifications for Structural Concrete
• ACI 301-xx
The Concrete Convention
and Exposition
Membership• Voting Members- 37
– Increased membership by 3 votes
– Returning voting- 22
– From subcommittee- 7
– From consulting- 1
– New members- 7
– Balance: P-14, U-18, GI-5
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Steering Committee
Michelle Wilson, Chair
Jason Bray, Secretary
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Steering Committee
Eric Koehler- Section 1, 301 A
General Requirements, Definitions, and Tolerances
Daniel Toon- Section 2, 301 B
Formwork and Formwork Accessories
John Turner- Section 3, 301 C
Reinforcement and Reinforcement Supports
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Steering Committee
Henry Prenger- Section 4, 301 D
Concrete Mixtures
Michael Hernandez-Section 5, 301 E
Handling, Placing, and Constructing
Anthony DeCarlo- Section 6, 301 F
Architectural Concrete
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Steering Committee
Kenneth Harmon-Section 7, 301 G
Lightweight Concrete
John Gajda-Section 8, 301 H
Mass Concrete
Theodore Neff- Section 9, 301 I
Post-tensioned Concrete
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Steering Committee
Scott Tarr-Section 10, 301 J and Section 11, 301K
Shrinkage Compensating Concrete
Industrial Floor Slabs
Anthony DeCarlo- Section 12, 301 L
Tilt-up Construction
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Steering Committee
Roger Becker-Section 13, 301 M and Section 14, 301N
Precast Structural Concrete
Precast Architectural Concrete
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Subcommittee Members- 38
– Returning subcommittee – 18
– New members-15
– From Main committee- 5
– Moved up to voting- 7
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Membership• Consulting Members- 4
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Meetings
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Meetings
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Committee Goals• Tackle New Business Items
• Editorial Formatting
• Chicago Style Politics
• 5 year cycle
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
New Business
• Topics generated from TAC and Public Comment
– TAC generated 610 total comments and 46 New Business Items
– Public generated 315 total comments and 81 New Business Items
– Total New Business Items: 127
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Title of Document
• Specifications for Structural Concrete
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Definition of Structural Concrete
• 301-16- plain or reinforced concrete in a member
required to transfer gravity loads, lateral loads, or both, to the ground.
• CT- plain or reinforced concrete in a member that is part of a structural system required to transfer gravity loads, lateral loads, or both, along a load path to the ground.
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 1- General Requirements, Definitions and Tolerances• Definitions:
– Architect/Engineer vs. Licensed Design Professional
– Acceptance
• 1.6.2.2. Initial Curing responsibility
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 2- Formwork and Formwork Accessories• Formwork removal criteria for
non-loadbearing formwork
• Void forms- ‘carton’ forms
• Joints- Do they belong in Section 2 or 5?
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 3- Reinforcement and Reinforcement Supports• WWF supports. Bar supports in critical areas
• New galvanized specification
• Heating bars for bending- A.W.S.
• Non-contact laps- permitted by 318 not specified in 301
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 4- Concrete Mixtures• Durability- low permeability
• ASR- coordinate with ASTM C1778
• Macrofibers
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 5- Handling, Placing, and Constructing• Joints
• Finishes- heavy-duty topping for 2-course slabs
• Temperature limits
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 6- Architectural Concrete• Mock Ups
• Acceptance
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 7- Lightweight Concrete• Internal Curing
• Remove- Not to use max w/cm for LW in Section 4.
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 8- Mass Concrete• Definition of Mass Concrete
• DEF
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 9- Post-Tensioned Concrete• Clarifying the finishing requirements
• Flame cutting
• Protection of anchorage
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 10- Shrinkage-Compensating Concrete• Expand scope
• SCC isolation joints- Section 5
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 11- Industrial Floor Slabs• Definition of Industrial Floors
• Redundant provisions
• Protection plan for curing period-non-air entrained floors
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Section 12- Tilt-up Construction• Surface finish
• Membranes
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Sections 13 and 14- Precast Structural Concrete and Precast Architectural Concrete
• Restructure sections
• Consider new certification programs
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Other New Business• ITG-4.1-07: Specification for High-Strength
Concrete in Moderate to High Seismic Applications
• Paving
• Shotcrete
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Cheers to the Next Cycle!
ACI 301 Specifications for Structural Concrete
The Concrete Convention
and Exposition
Thank you.
