Production of sodium silicate powder from waste glass cullet for alkali activation of alternative binders

Vinai, Raffaele; Soutsos, Marios

doi:10.1016/j.cemconres.2018.11.008

Cited by 200 publications

(82 citation statements)

References 48 publications

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“…So, alternative routes to alkali-activation that do not require the use of large volumes of commercial sodium silicate solutions have received serious recent attention. The production of silicate activators from olivine [6] or from waste glass [7][8][9][10], and the use of biomass ashes as an alkaline activator [11], have been established with some success.…”

Section: Activatorsmentioning

confidence: 99%

Recent progress in low-carbon binders

Shi

Provis

2019

Cement and Concrete Research

490

131

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The development of low-carbon binders has been recognized as a means of reducing the carbon footprint of the Portland cement industry, in response to growing global concerns over CO2 emissions from the construction sector. This paper reviews recent progress in the three most attractive low-carbon binders: alkali-activated, carbonate, and belite-ye'elimite-based binders. Alkali-activated binders/materials were reviewed at the past two ICCC congresses, so this paper focuses on some key developments of alkali-activated binders/materials since the last keynote paper was published in 2015. Recent progress on carbonate and belite-ye'elimite-based binders are also reviewed and discussed, as they are attracting more and more attention as essential alternative low-carbon cementitious materials. These classes of binders have a clear role to play in providing a sustainable future for global construction, as part of the available toolkit of cements.

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Section: Activatorsmentioning

confidence: 99%

Recent progress in low-carbon binders

Shi

Provis

2019

Cement and Concrete Research

490

131

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“…Finalmente, la ceniza de hoja de bambú (CHB), que posee un porcentaje de SiO2 cercano al 80% (Roselló et al, 2015), se constituye como otra opción interesante. La CHB se usó a través de un proceso termoquímico (Figura 3) con una temperatura de 300-330ºC (Vinai et al, 2021). El activador se usó para el sistema CV/ESC (60/40) y se ha comprobado que, si bien, comparado con el activador SS+NaOH, la reactividad es menor en los primeros 7 días de curado, a los 28 días se alcanzan las mismas resistencias (alrededor de 43 MPa).…”

Section: Activadores De Base Silícea Procedentes De Cenizas De Biomasaunclassified

Activadores alternativos para cementos de activación alcalina.

Payá¹,

Monzó²,

Borrachero³

et al. 2021

Congreso Latino-Americano De Patología De Construcción

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Alkali activated cements (AAC) require an alkaline component for activating of the precursor. The manufacture of the alkaline activator (AA) involves a very important energy and raw material consumption, so that the carbon footprint (CF) of AAC is basically influenced by this factor. An alternative is the use of other materials for AA preparation. In this work an exhaustive analysis of the different alternatives is carried out: silica-based materials to prepare of alternative silicates and alkaline-based materials. CF is compared relative to commercial Portland cements, and the effect of replacing commercial reagents with alternative activators is analyzed.

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“…As a result this material is usually landfilled. Extensive experimental work has been undertaken to use this material as the silicate source required for the alkali activation in the geopolymer system as described in Vinai and Soutsos, (2019). The fine GC powder is combined with sodium hydroxide in mass proportions of 48%/52% and combined with water to make a paste.…”

Section: Suitable Waste Streams For Geopolymer Concretementioning

confidence: 99%

Demonstration of using low carbon precast concrete products for an energy efficient built environment

McGrath¹,

Kwasny²,

Aiken

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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The production of Portland cement is well acknowledged as having a significant impact on the environment, accounting for 8% of global CO2 emissions (4bn tonnes per annum). Concrete is the most widely used man-made material in the world and therefore has a vast potential to absorb high volumes of waste and by-product materials. These materials can act as partial replacements, i.e. supplementary cementitious materials, or total replacements and be the cement-like precursors for geopolymer concretes. The LowCoPreCon project brings together academic and industrial partners from the UK and Malaysia with the aim of identifying available waste streams with which to manufacture geopolymer concretes on a commercial scale. Initial laboratory work was conducted by academic partners to design geopolymer concretes that had both optimum strength and workability. These mixes were then used in factory trials to successfully cast structural elements, including building blocks, wall slabs and staircases. To determine the potential environmental benefits of geopolymer concrete, a detailed life cycle assessment will be conducted. Two demonstration projects using the novel material will be constructed in Malaysia; a domestic building and a FlexiArch bridge.

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Production of sodium silicate powder from waste glass cullet for alkali activation of alternative binders

Cited by 200 publications

References 48 publications

Recent progress in low-carbon binders

Recent progress in low-carbon binders

Activadores alternativos para cementos de activación alcalina.

Demonstration of using low carbon precast concrete products for an energy efficient built environment

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