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Progress with enhancing the sustainability of Australian cements.
Warren South – Manager-Technology,
Cement, Concrete and Aggregates Australia
Progress with enhancing the sustainability of Australian cements.
– Motivation
– Project
– Content
– Interim Data
– Future Work
Progress with enhancing the sustainability of Australian cements.
1. Motivation
• Building on the work done in support of the review
of Australian Standard 3972 – 2010 General
purpose and blended cements.
• Respond to community concerns regarding the
embodied emissions in concrete ( specifically CO2)
• Maintain the competitiveness of concrete as a
building medium
A general industry response is given in the “Cement
Industry Roadmap” (2009) (WBCSD – CSI)
3.3 GJ/t
7.15 %
74 %
0.66 t CO2e
Progress with enhancing the sustainability of Australian cements.
Progress with enhancing the sustainability of Australian cements.
2. Project
• Foundation of a Working Group under auspices of Standards Australia
• Concrete industry representation – cement manufacturers, concrete manufacturers, engineers, specifiers, academia
• Representatives to report to constituency an seek feedback
• Project scope – determine the optimum level of mineral substitution in Type GP cement
• Project timeline – Aim for a green paper amendment of AS 3972-2010 by December 2012
Progress with enhancing the sustainability of Australian cements.
Progress with enhancing the sustainability of Australian cements.
3. Content
• Two stage work plan
• Stage 1 – preliminary cement laboratory work
to re-affirm performance of cements with high
addition levels
• Stage 2 – Concrete laboratory and field
performance including durability
characterisation
• Regular review of progress and data review
Progress with enhancing the sustainability of Australian cements.
Stage 1
Scope:
•Limestone levels - nominal 5%(Control), 7.5%, 10% and 12.5%
•A production run at each of the limestone levels.
•To be conducted at one or two plants by each cement manufacturer.
•Expecting 5-6 sets of data.
Mortar:
•Three grab samples for testing compressive strengths.
•One sample tests of sulfate expansion, shrinkage and peak temperature rise.
•Other tests at the discretion of the cement company would include the normal
•suite of cement tests.
Concrete:
•Standard concrete mix (32 MPa) by cement company.
•Bleed rates.
•Setting times.
•Compressive strengths at 1, 3, 7, 28 and 56 days.
•Drying shrinkage up to 56 days.
•Water demand.
Stage 2
Progress with enhancing the sustainability of Australian cements.
Stage 2
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
4. Interim Data
Progress with enhancing the sustainability of Australian cements.
Progress with enhancing the sustainability of Australian cements.
5. Further Work
• Manufacture cements for concrete testing
• Stage 1 – continue to generate longer term
results
• Stage 2 – Manufacture cements for concrete
testing
• Confirm logistics of field trials
• Confirm test/laboratory availability
• Continue regular review of progress and data
review
