Life cycle inventories for the production of sodium silicates

Fawer, Matthias S.; Concannon, Martin; Rieber, Wolfram

doi:10.1007/bf02979498

Cited by 252 publications

(86 citation statements)

References 2 publications

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“…On the contrary, the differences between production type (diaphragm cell, membrane cell or mercury cell) have smaller influences (table 2). Concerning sodium silicate solution, the values of ecoinvent version 3 are still based on the initial Fawer study [40] except that, differing from version 2, the exclusion of the water considerably reduces the environmental impact as already noticed by Davidovits [19]. All these data are presented with CML calculation method in order to allow a comparison with previous studies [22].…”

Section: Activatorsmentioning

confidence: 99%

Recent update on the environmental impact of geopolymers

2016

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The contribution of building materials' production to environmental impacts becomes significant in the new energy efficient buildings that are currently built. Among those materials, cement represents a major part of the embodied carbon footprint of buildings. Development of alternatives to traditional Portland cement have emerged over the last decades; however, their environmental assessment over their life cycle have resulted in conflicting results, which give a confusing picture of the strategic path to be followed. This paper focuses on the alkali-activated cement and concrete and points out the variability linked with the choice of energy source for the production of the activators and precursors. A review of existing studies is then performed in order to highlight the main benefits of these alternative cements in terms of reduction of greenhouse gas emissions. Finally, the results presented here highlight further research trends for new cements and concrete.

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Section: Activatorsmentioning

confidence: 99%

Recent update on the environmental impact of geopolymers

2016

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“…A large number of published studies are based on a single source of data for the environmental footprint of a waterglass activator [82], which has become incorporated into international LCA databases.…”

Section: Simplified Environmental Assessmentmentioning

confidence: 99%

Alkali-activated materials

Provis

2018

Cement and Concrete Research

1,319

371

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This paper, which forms part of the UNEP White Papers series on Eco-Efficient Cements, provides a brief discussion of the class of cementing materials known as 'alkali-activated binders', which are identified to have potential for utilization as a key component of a sustainable future global construction materials industry. These cements are not expected to offer a like-for-like replacement of Portland cement across its full range of applications, for reasons related to supply chain limitations, practical challenges in some modes of application, and the need for careful control of formulation and curing. However, when produced using locallyavailable raw materials, with well-formulated mix designs (including in particular consideration of the environmental footprint of the alkaline activator) and production under adequate levels of quality control, alkali-activated binders are potentially an important and cost-effective component of the future toolkit of sustainable construction materials.

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“…In 8 hours, the soil is excavated and loaded into a truck at the rate of 6 Na 2 SiO 3 Energy for the production of Na 2 SiO 3 -5.36 MJ/kg [5] the ingredients of TBS-BP-L/LPC based geopolymer masonry units.…”

Section: Excavation Of Tbsmentioning

confidence: 99%

Embodied Energy & Cost Issues of Tank-Bed-Lime Based Geopolymer Adobes

Jyothi¹,

Varsha²,

Raghunath³

et al. 2017

OJEE

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It is well-known that a product or a system is sustainable if it is economically viable, socially acceptable and environmentally friendly. Load bearing masonry is one such example which is quite sustainable, especially if the masonry units are locally available. It is important to quantify the environmental benefits and cost, if an alternative to an existing technology is to be suggested. Of course the issues related to acceptance have to be discussed and addressed. This paper presents the quantification of embodied energy and cost of limepozzolana-cement (LPC) geopolymer based masonry units made using locally available bulk ingredients viz. tank-bed soil (TBS) and brick-powder (BP). The masonry adobe units developed have achieved the target performance in terms of strength, low water absorption and relative ease of production. Simultaneously the issues related to cost are also discussed in this paper. The studies have revealed that the bulk contributor to embodied energy and cost of geopolymer adobes are the alkaline materials viz sodium hydroxide and sodium silicate. However, the embodied energy and cost per unit strength appears to be better than that of conventional table moulded bricks in south India, especially when alkaline solution at 2M concentration is used with LPC.

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Life cycle inventories for the production of sodium silicates

Cited by 252 publications

References 2 publications

Recent update on the environmental impact of geopolymers

Recent update on the environmental impact of geopolymers

Alkali-activated materials

Embodied Energy & Cost Issues of Tank-Bed-Lime Based Geopolymer Adobes

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Life cycle inventories for the production of sodium silicates

Cited by 252 publications

References 2 publications

Recent update on the environmental impact of geopolymers

Recent update on the environmental impact of geopolymers

Alkali-activated materials

Embodied Energy &amp; Cost Issues of Tank-Bed-Lime Based Geopolymer Adobes

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Product

Resources

About

Embodied Energy & Cost Issues of Tank-Bed-Lime Based Geopolymer Adobes