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Green Enduring Concrete GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE Angus Peruzzo Nilotpol Kar Angus Peruzzo Nilotpol Kar.

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Presentation on theme: "Green Enduring Concrete GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE Angus Peruzzo Nilotpol Kar Angus Peruzzo Nilotpol Kar."— Presentation transcript:

1 Green Enduring Concrete GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE Angus Peruzzo Nilotpol Kar Angus Peruzzo Nilotpol Kar

2 2 One of the most important challenges confronting the concrete industry - to meet the housing and infrastructural needs of society in a sustainable manner! GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE 4/28/2015

3 Chemistry can transform construction industry towards sustainability Contributes to 30 % of the global greenhouse gas emissions Displaces the most productive land Consumes up to 40 % of the worlds energy Contributes to loss of biodiversity and ecosystems Causes 10% of the world´s emission of fine dust Chemical innovations help the construction Industry to become more sustainable with innovative solutions through chemistry Chemical innovations help the construction Industry to become more sustainable with innovative solutions through chemistry 4/28/2015 GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE

4 Green Enduring Concrete Cases High Volume SCM concrete High Strength High Performance Concrete (UHSC) Low fines self consolidating concrete High Volume Manufactured Sands Hydration Controlled Concrete GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE 4/28/2015

5 5 Case 1: High Volume SCM concrete a major hi rise (~ 632 m) in China in a C50R90 mix for foundation works Challenges: Tight construction schedule - single pour of ~60,000 m 3 Mass concrete application requiring low cement content to control heat of hydration Application of manufactured sand mandatory due to limited availability of river sand Achievements: Completed in 60 hours – 450 trucks, 18 pumps Concrete temperature < 20 o C, with ternary blend 50% manufactured sand with super flow retention upto 90 min 7d28d60d90d Average (MPa) GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE

6 4/28/ Case 1 : High Volume SCM concrete a major hi rise (~ 632 m) in China in a C50R90 mix for foundation works VIDEO

7 7 To get wider floor space by downsizing columns To get no-column living space for flexible interior design Small Large Case 2 : High Strength High Performance Concrete (UHSC) Achieving higher floor space in high-rise building 7 Design Fc (N/mm 2 ) W/B (%) unit , (kg/ m 3 ) flow (cm) Air content (%) waterbindersandstone PCE HRWR fiber C130 Concrete Design: (kg/m 3 ) Source: Kuroiwa et al., Concrete Engineering, Vol. 42, No.10, pp.44-49, 2004/10 GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE 4/28/2015

8 8 Case 3 : Low fines self consolidating concrete e.g. Japan ・ TVC (grade N) Slump cm Air – 4.6% (typ in JP) Concrete Temp: 18.0 ℃ ・ TVC (grade N) Slump cm Air – 4.6% (typ in JP) Concrete Temp: 18.0 ℃ ・ SDC (grade N) Flow cm T50/Tstop 3.0 / 4.7 sec Air - 4.8% (typ in JP) Concrete Temp: 18.0 ℃ ・ SDC (grade N) Flow cm T50/Tstop 3.0 / 4.7 sec Air - 4.8% (typ in JP) Concrete Temp: 18.0 ℃ GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE

9 Case 3 : Low fines self consolidating concrete lowest cementitious content of 300 kg/m 3 in NZ VIDEO

10 4/28/ Case 3 : Low fines self consolidating concrete - Value Proposition: Productivity – efficient resource utilisation and higher output VIDEO

11 11 Case Study 4 : High Volume Manufactured Sands Maximise use of unprocessed manufactured sands Main Issues – “smectite clays”, particles < 150 μ, irregular particle shape, PSD Polymer modifications have helped: −Better rheology −Good water reduction upto 10% for low grade concretes −Sustainable WRA mix RHEOPLUS Mix Cement230 Coarse Agg52%51% Sand39%8% CRF9%41% WRA0.45%- RHEOPLUS-1.0% Savings Use of more m-sand SureTEC® technology Clay increased Keeps dispersing Conventional PCE technology Clay increased Weakening dispersion GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE 4/28/2015

12 Case Study 5 : Hydration Control Agents 4/28/2015 GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE The disposal of returned plastic concrete and concrete washwater is an environmental challenge for concrete producers. It is estimated that approximately 2 to 10 % of all concrete produced is returned for disposal potentially creating unnecessary landfill waste. With HCAs, producers can control cement hydration to better manage returned plastic concrete and also reduce concrete washwater. The disposal of returned plastic concrete and concrete washwater is an environmental challenge for concrete producers. It is estimated that approximately 2 to 10 % of all concrete produced is returned for disposal potentially creating unnecessary landfill waste. With HCAs, producers can control cement hydration to better manage returned plastic concrete and also reduce concrete washwater. Why HCA is a sustainable technology Reduces water needed to clean ready-mix truck drums Reduces concrete washwater disposal Reduces the need for disposal of returned plastic concrete Reduces construction waste Why HCA is a sustainable technology Reduces water needed to clean ready-mix truck drums Reduces concrete washwater disposal Reduces the need for disposal of returned plastic concrete Reduces construction waste How it works Adsorbs on the surface of cementitious materials Forms a protective barrier and controls the setting characteristics of concrete Acts as a dispersant, providing water reduction, enhanced workability, and improved compressive strength How it works Adsorbs on the surface of cementitious materials Forms a protective barrier and controls the setting characteristics of concrete Acts as a dispersant, providing water reduction, enhanced workability, and improved compressive strength

13 GREEN ENDURING CONCRETE_CMIC 2012_MELBOURNE 4/28/2015


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