how do we expand the use of cement replacement materials
DESCRIPTION
This is the key note talk given at the Green Concrete Performance Workshop at NIST on July 20th, 2012.TRANSCRIPT
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How do we expand the use of cement replacement materials?
Ryan HenkensiefkenU.S. Concrete
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The “Old Way”
Economic Growth GDP Construction Focused Groups
Design
Bid
Build
Owner
Designer
Builder
Supplier
Contrac
t
Contrac
t
Contrac
t
Contract = Barrier
GDP
$
$
$
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The “New Way”
Current Growth GDP
Owner/CMSustainability
vs.Future Growth Construction Integrative
DesignDesign/Build Contract
Builder Designer
Supplier
1. Natural Resources2. Skilled Workforce3. Healthy Workforce
Owner
Designer
Builder
Supplier
Builder Designer
Supplier
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The Parties Involved
1. Educator2. Researcher3. Designer4. Builder5. Supplier/RMP
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Points of Influence
University(skills)
Educator
Researcher
Designer
Builder
Supplier
Architect
Engineer
Design & Development
Construction
Performance1. Cost & Design Life2. Natural Resources3. Health
Supplier/RMP
CM
Parties Involved1. Educator2. Researcher3. Designer4. Builder5. Supplier/RMP
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Effective Communication is the Key
Owner
Designer
Builder
Supplier
Builder Designer
Supplier
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Supplier/RMP
*Concrete Technology is more advanced than Industry
Bridge the Gap
Data Availability
Reliability
MethodologyStandards• ASTM• ACI• Product Category Rules• Environmental Product Declaration
Scale• 3pt Curve
Social• What’s important to us
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What’s Important to Us?
Energy Use over a Design Life
Carbon
Water Use
Conserving Virgin Materials
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Scale
35 Mixes Per Curvex
4 Different Curves (100% Cement, 15% & 20% Ash, 50% SCM)x
11 Plants=
1,540 Mix Designs
Since 1980
~70,000 New Mix Designs
~2,300 New Mix Designs a Year
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Researcher
Reliable Performance Test Methods
Do we have good durability measurements?
ASR (11 Different Tests)
Rapid Chloride Permeability
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Researcher
Need to have a common method for measuring…
Sustainability
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Researcher
Needs of Today1. Ternary mixes with slag and fly ash can easily
replace 50% of cement2. Where slag is not available, we need something
to get the last 25% or the whole 50%3. Fully optimize current technologies4. Need to develop long term durability
measurements5. Need to be thinking about needs of the future
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How do we expand the use of cement replacement materials?
Questions