A comparison between different foaming methods for the synthesis of light weight geopolymers

Masi, Giulia; Rickard, William D.A.; Vickers, Les; Bignozzi, Maria Chiara; Riessen, Arie van

doi:10.1016/j.ceramint.2014.05.108

Cited by 241 publications

(113 citation statements)

References 29 publications

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“…A wide variety of routes to foamed alkali-activated materials have also been demonstrated [85][86][87][88][89][90][91], and these offer pathways to the reduction of operational energy.…”

Section: Simplified Environmental Assessmentmentioning

confidence: 99%

Alkali-activated materials

Provis

2018

Cement and Concrete Research

1,137

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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“…A wide variety of routes to foamed alkali-activated materials have also been demonstrated [85][86][87][88][89][90][91], and these offer pathways to the reduction of operational energy.…”

Section: Simplified Environmental Assessmentmentioning

confidence: 99%

Alkali-activated materials

Provis

2018

Cement and Concrete Research

1,137

371

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“…Even if the control of porosity dimension is complex, good thermal insulation properties, comparable with commercial organic and inorganic thermal insulating materials were achieved [31].…”

Section: Introductionmentioning

confidence: 99%

Geopolymer technology for application-oriented dense and lightened materials. Elaboration and characterization

Palmero

Formia

Antonaci

et al. 2015

Ceramics International

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“…The connectivity of pores depends on the foaming methods and the use of different foaming agents. The use of alumina powder and hydrogen peroxide can generate a GFC with relatively lower connected pores than using surfactant, at even a lower density (more voids) conditions (Masi et al, 2014); the use of a combination of oleic acid and H2 solution results in more connected pores, which can significantly increase the fluid transportation rate through the geopolymer foam (unpublished data by the authors). The high connectivity of individual fine pores leads to large open and interacted pores, which lower the compressive strength but can be desirable for other purposes (Zhang et al, 2016).…”

mentioning

confidence: 99%

The Pore Characteristics of Geopolymer Foam Concrete and Their Impact on the Compressive Strength and Modulus

Zhang

Wang

2016

Front. Mater.

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The pore characteristics of geopolymer foam concretes (GFCs) manufactured in the laboratory with 0-16% foam additions were examined using image analysis (IA) and vacuum water saturation techniques. The pore size distribution, pore shape, and porosity were obtained. The IA method provides a suitable approach to obtain the information of large pores, which are more important in affecting the compressive strength of GFC. By examining the applicability of the existing models of predicting compressive strength of foam concrete, a modified Ryshkevitch's model is proposed for GFC, in which only the porosity that is contributed by the pores over a critical diameter (>100 μm) is considered. This "critical void model" is shown to have very satisfying prediction capability in the studied range of porosity. A compression-modulus model for Portland cement concrete is recommended for predicting the compression-modulus elasticity of GFC. This study confirms that GFC have similar pore structures and mechanical behavior as those Portland cement foam concrete and can be used alternatively in the industry for the construction and insulation purposes.

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A comparison between different foaming methods for the synthesis of light weight geopolymers

Cited by 241 publications

References 29 publications

Alkali-activated materials

Alkali-activated materials

Geopolymer technology for application-oriented dense and lightened materials. Elaboration and characterization

The Pore Characteristics of Geopolymer Foam Concrete and Their Impact on the Compressive Strength and Modulus

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