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Open AccessJournal ArticleDOI

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
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.
Journal ArticleDOI

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

Reaction kinetics, reaction products and compressive strength of ternary activators activated slag designed by Taguchi method

B Bo Yuan, +2 more
- 05 Dec 2015 - 
TL;DR: In this article, the authors investigated the reaction kinetics, the reaction products and the compressive strength of slag activated by ternary activators, namely waterglass, sodium hydroxide and sodium carbonate.
Journal ArticleDOI

Synthesis of a green nano-silica material using beneficiated waste dunites and its application in concrete

A. Lazaro, +3 more
- 06 Sep 2013 - 
TL;DR: In this article, the authors proposed to use olivine nano-silica to improve the compressive strength and reduce the CO2 emissions in conventional vibrated concrete (VC).
Journal ArticleDOI

Research on several physico-mechanical properties of lightweight aggregate concrete☆

Kung Lo-shu, +3 more
- 01 Dec 1980 - 
Journal ArticleDOI

Approximate Strength of Lightweight Aggregate Using Micromechanics Method

Chung-Chia Yang, +1 more
- 01 Apr 1998 - 
TL;DR: In this article, a method for estimating the strength of lightweight aggregate was presented, which was applied by considering a perfect bond between mortar and aggregate and the approximate aggregate strength determined from the concrete strength, component properties, and the volume ratio of aggregate were between 15 and 30 MPa.
Journal ArticleDOI

Microstructural, physical, and thermal analyses of Portland cement–fly ash–calcium hydroxide blended pastes

Thanongsak Nochaiya, +3 more
- 01 Apr 2010 - 
TL;DR: In this paper, the effect of calcium hydroxide (CH) on the properties of Portland-fly ash cement pastes, at up to high-volume fly ash mixes has been investigated using normal consistency, setting time, compressive strength, thermal analysis and scanning electron microscope.
Related Papers (5)

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
- 01 Oct 2021 - 

Properties and characterization of green one-part geopolymer activated by composite activators

Cong Ma, +4 more
- 20 May 2019 - 

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

Erich D. Rodríguez, +5 more
- 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 %.