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Effects of an eco-silica source based activator on functional alkali activated lightweight composites

Xu Gao, +1 more
- 10 Aug 2019 - 
- Vol. 215, pp 686-695
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TLDR
In this article, an eco-olivine nano-silica is applied to prepare sustainable silicate based activators to replace commercial sodium silicates, and the results show the positive effect of density and Na2O content on strength.
About: 
This article is published in Construction and Building Materials.The article was published on 2019-08-10 and is currently open access. It has received 8 citations till now. The article focuses on the topics: Portland cement.

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Advances in geopolymer materials: A comprehensive review

Peiliang Cong, +1 more
- 01 Jun 2021 - 
TL;DR: In this paper, the shortcomings and application limitations of geopolymer materials were summarized, and their progress was summarized to lay a theoretical foundation for the long-term development of the materials.
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Alkali-Activated Materials and Geopolymer: a Review of Common Precursors and Activators Addressing Circular Economy

Mehrab Nodehi, +1 more
TL;DR: In this paper, the authors reviewed different types, mechanisms, and result of mechanical and durability properties of alkali-activated materials and geopolymer reported in literature and discussed future projections of waste materials that have cementitious properties and can replace ordinary Portland cement and be used in alkali activated materials.
Journal ArticleDOI

Potential use of limestone in metakaolin-based geopolymer activated with H3PO4 for thermal insulation

M.S. Morsy, +3 more
- 30 Dec 2019 - 
TL;DR: In this article, an insulating material synthesized from metakaolin, limestone powder and phosphoric acid was analyzed by using sophisticated tools such as X-ray diffraction, thermogravimetric/its derivative, scanning electron microscopy and energy dispersive analytical Xray.
Journal ArticleDOI

A comparative review on foam-based versus lightweight aggregate-based alkali-activated materials and geopolymer

Mehrab Nodehi
- 01 Dec 2021 - 
TL;DR: In this paper, the authors provide an updated information on recent advances while stressing the sustainability of lightweight geopolymer materials over ordinary Portland cement products that are vastly in use, including perlite, pumice, shale, ceramsite, and slate sand.
Journal ArticleDOI

Fresh, mechanical and microstructural properties of alkali-activated composites incorporating nanomaterials: A comprehensive review

Hossein Khorshidi, +3 more
- 01 Dec 2022 - 
TL;DR: In this paper , nano-modified alkali-activated composites (AACs) or geopolymers have attracted attention owing to their excellent performance and modification mechanisms, and the results mostly indicated that while increasing nano-additives proportion to a certain extent improves the mechanical characteristics, including compressive, flexural, tensile, and impact strengths, incorporation beyond that amount deteriorates them.
References
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Journal ArticleDOI

Thermal insulating foamy geopolymers from perlite

V. Vaou, +1 more
- 01 Nov 2010 - 
TL;DR: In this paper, the ability of geopolymerization technology for production of thermal insulating foamy inorganic polymers utilizing as solid raw material ultrafine perlite which is a by-product from comminution and sizing operations of perlite exploitation is demonstrated.
Journal ArticleDOI

Lightweight concretes of activated metakaolin-fly ash binders, with blast furnace slag aggregates

R. Arellano Aguilar, +2 more
- 01 Jul 2010 - 
TL;DR: In this paper, the authors investigated geopolymeric lightweight concretes based on binders composed of metakaolin with 0% and 25% fly ash, activated with 15.2% of Na2O using sodium silicate of modulus SiO2/Na2O = 1.2.
Journal ArticleDOI

Activation of Metakaolin/Slag Blends Using Alkaline Solutions Based on Chemically Modified Silica Fume and Rice Husk Ash

Susan A. Bernal, +6 more
- 01 Mar 2012 - 
TL;DR: In this paper, the use of alkaline silicate solutions produced by mixing silica fume (SF) or rice husk ash (RHA) with aqueous NaOH is described as alternative silica-based activators for metakaolin (MK)/slag (GBFS) blended binders.
Journal ArticleDOI

Properties of alkali activated slag-fly ash blends with limestone addition

X Xu Gao, +2 more
- 01 May 2015 - 
TL;DR: In this paper, the effects of raw materials' composition on fresh behavior, reaction kinetics, mechanical properties and microstructure of alkali activated slag-fly ash-limestone blends are investigated.
Journal ArticleDOI

Mechanical properties of expanded polystyrene lightweight aggregate concrete and brick

Yi Xu, +3 more
- 01 Feb 2012 - 
TL;DR: In this article, the authors analyzed the mix proportion parameters of expanded polystyrene (EPS) lightweight aggregate concrete by using Taguchi's approach and found that EPS dosage has the most significant effect on compressive strength, then water and cement ratio, while the content of cement and sand ratio play comparatively less important part.
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Characterization of alkali activated slag–fly ash blends containing nano-silica

X Xu Gao, +2 more
- 15 Nov 2015 - 

Influence of sodium silicate powder silica modulus for mechanical and chemical properties of dry-mix alkali-activated slag mortar

Tero Luukkonen, +7 more
- 10 Feb 2020 - 

Investigation on the roles of solution-based alkali and silica in activated low-calcium fly ash and slag blends

K. Chiranjeevi Reddy, +1 more
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Properties and characterization of green one-part geopolymer activated by composite activators

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- 20 May 2019 - 

Effect of nanosilica-based activators on the performance of an alkali-activated fly ash binder

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- 01 Jan 2013 - 
Frequently Asked Questions (1)
Q1. What are the contributions in "Effects of an eco-silica source based activator on functional alkali activated lightweight composites" ?

In this paper, alkali activated slag-fly ash lightweight composites with moderate densities between around 1200 and 1500 kg/m are prepared and characterized. The calculation on the carbon footprint shows an evident advantage of using alkali activated materials to replace Portland cement, also the utilization of olivine nano-silica further reduces the carbon emission of the activator by around 25 %.