Development of Foam One-Part Geopolymers with Enhanced Thermal Insulation Performance and Low Carbon Dioxide Emissions

Abstract:

Buildings are responsible for more than 40% of the energy consumption and greenhouse gas emissions. Thus, increasing building energy efficiency is one the most cost-effective ways to reduce emissions. The use of thermal insulation materials could constitute the most effective way of reducing heat losses in buildings by minimising heat energy needs. These materials have a thermal conductivity factor lower than 0.065 (W/m.K) while other insulation materials such as aerated concrete can go up to 0.11. Current insulation materials are associated with negative impacts in terms of toxicity. Polystyrene, for example contains anti-oxidant additives and ignition retardants. In addition, its production involves the generation of benzene and chlorofluorocarbons. Polyurethane is obtained from isocyanates, which are widely known for their tragic association with the Bhopal disaster. Besides current insulation materials releases toxic fumes when subjected to fire. This paper presents experimental results on one-part geopolymers. It also includes global warming potential assessment and cost analysis. The results show that only the use of aluminium powder allows the production mixtures with a high compressive strength however its high cost means they are commercially useless when facing the competition of commercial cellular concrete. The results also show that one-part geopolymer mixtures based on 26% Ordinary Portland Cement (OPC)+58.3% Fly Ash (FA)+8% Calcined Stuff (CS) +7.7% Calcium Hydroxide (CH) and 3.5% hydrogen peroxide constitute a promising cost efficient (67 euro/m³), thermal insulation solution for floor heating systems with low global warming potential of 443 KgCO_2eq/m³.

• Periodical: Advanced Materials Research (Volume 1129)
• Pages: 565-572
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1129.565
• Online since: November 2015
• Authors: Z. Abdollahnejad, F. Pacheco-Torgal, José Barroso de Aguiar
• Keywords: Carbon Dioxide Emissions, Compressive Strength, Cost Efficiency, Foam Agents, Geopolymers, Thermal Conductivity

References

[1] F. Pacheco-Torgal, S. Jalali, Eco-efficient construction and building materials, Springer Verlag, London, UK (2011).

DOI: 10.1007/978-0-85729-892-8

[2] UN, Energy for a sustainable future. The Secretary-General's Advisory Group on energy and climate change, New York (2010).

[3] WHO, Urban population growth, Global health observatory (2014).

[4] OCDE, Environmental sustainable building—challenges and policies, Paris (2003).

[5] F. Pacheco-Torgal, L. Cabeza, M. Mistretta, A. Kaklauskas, G. Granqvist, Nearly zero energy building refurbishment, A multidisciplinary approach Springer Verlag, London, UK (2013).

DOI: 10.1007/978-1-4471-5523-2

[6] F. Pacheco-Torgal, Eco-efficient construction and building materials research under the EU Framework Programme Horizon 2020, Constr. Build. Mat. 51 (2014), 151-162.

DOI: 10.1016/j.conbuildmat.2013.10.058

[7] F. Pacheco-Torgal, A. Fucic, S. Jalali, Toxicity of Building Materials. Woodhead Publishing Limited Abington Hall, Cambridge, UK (2012).

DOI: 10.1533/9780857096357

[8] Regulation (EU) 305, Construction Products Regulation (2011).

[9] J. Davidovits, Synthesis of new high temperature geo-polymers for reinforced plastics/composites. SPE PACTEC 79 Society of Plastic Engineers, Brookfield Center (1979) 151-154.

[10] J. L. Provis, J.S.J. Van Deventer, Geopolymers: Structure, Processing, Properties and Industrial Applications, Woodhead Publishing, Cambridge, UK (2009).

[11] F. Pacheco-Torgal, Z. Abdollahnejad, A. Camões, M. Jamshidi, Y. Ding, Durability of alkali-activated binders. A clear advantage over Portland cement or an unproven issue ? Constr. Build. Mat. 30 (2012) 400-405.

DOI: 10.1016/j.conbuildmat.2011.12.017

[12] J.L. Provis, Durability of geopolymers as 21st century concretes, ERC Starting grant for the period 2013-(2018).

[13] F. Pacheco-Torgal, J.A. Labrincha, C. Leonelli, A. Palomo, P. Chindaprasirt, Handbook of Alkali-Activated Cements, Mortars and Concretes ed. 1. Abington Hall, Cambridge, UK: WoodHead Publishing Limited- Elsevier Science and Technology (2014).

DOI: 10.1533/9781782422884.1

[14] D. Kolousek, J. Brus, M. Urbanova, J. Andertova, V. Hulinsky, J. Vorel, Preparation, structure and hydrothermal stability of alternative (sodium silicate-free) geopolymers, J. Mat. Sci. 42 (2007) 9267-9275.

DOI: 10.1007/s10853-007-1910-5

[15] M. -X. Peng, Z. -H. Wan, S. H Shen, Q.G. Xiao, Synthesis, Characterization and mechanisms of one-part geopolymeric cement by calcining low-quality kaolin with alkali, Materials and Structures 48 (2014) 699-708.

DOI: 10.1617/s11527-014-0350-3

[16] Z. Abdollahnejad, P. Hlavacek, S. Miraldo, F. Pacheco-Torgal, A. Aguiar, Compressive strength, microstructure and hydration products of hybrid alkaline cements. Materials Research 17 (2014), 10.

DOI: 10.1590/s1516-14392014005000091

[17] Z. Abdollahnejad, F. Pacheco-Torgal, A. Aguiar , C. Jesus, Durability of fly ash-based geopolymer. Key Engineering Materials 634 (2015) 113-120.

DOI: 10.4028/www.scientific.net/kem.634.113

[18] K. -H. Yang, K. -H. Lee, J. -K. Song, M. -H. Gong, Properties and sustainability of alkali-activated slag foamed concrete. Journal of Cleaner Production 68 (2014) 226-233.

DOI: 10.1016/j.jclepro.2013.12.068

[19] Z. Abdollahnejad, F. Pacheco-Torgal, A. Aguiar (2015) Mix design, properties and cost analysis of fly ash-based geopolymer. Construction and Building Materials 80, 18-30.

DOI: 10.1016/j.conbuildmat.2015.01.063