Results 101 to 110 of about 14,729 (212)

Contributions to the study of porosity in fly ash-based geopolymers. Relationship between degree of reaction, porosity and compressive strength

open access: yesMateriales de Construccion, 2016
The main contribution of this paper relates to the development of a systematic study involving a set of parameters which could potentially have an impact on geopolymer properties: curing temperature, type of activating solution, alkali metal in solution,
Y. Luna-Galiano   +2 more
doaj   +1 more source

Alkali-activated binders: a review: part 2. About materials and binders manufacture [PDF]

open access: yes, 2008
This paper summarizes current knowledge about alkali-activated binders, by reviewing previously published work. As it is shown in Part 1, alkali-activated binders have emerged as an alternative to (ordinary Portland cement) OPC binders, which seem to ...
Gomes, J. P. Castro   +2 more
core   +1 more source

High-temperature performance of mortars and concretes based on alkali-activated slag/metakaolin blends [PDF]

open access: yes, 2012
This paper assesses the performance of mortars and concretes based on alkali activated granulated blastfurnace slag (GBFS)/metakaolin (MK) blends when exposed to high temperatures.
Bernal, S.A.   +4 more
core   +3 more sources

Geopolymers Based on Phosphoric Acid and Illito-Kaolinitic Clay

open access: yesAdvances in Materials Science and Engineering, 2016
New three-dimensional geopolymer materials based on illito-kaolinitic clay and phosphoric acid were synthesized. The effect of Si/P molar ratio on the geopolymers properties was studied.
S. Louati, S. Baklouti, B. Samet
doaj   +1 more source

Performance of fly ash-based geopolymer mortar [PDF]

open access: yes, 2015
This study has investigated the joint effect of several mix parameters on the properties of foam geopolymers. The mix parameters analysed through a laboratory experiment of 54 different mortar mixes were, sodium silicate/sodium hydroxide mass ratio (2 ...
Abdollahnejad, Zahra   +3 more
core  

Composition, strength and workability of alkali-activated metakaolin based mortars [PDF]

open access: yes, 2011
This study has investigated the joint effect of several factors on the workability and mechanical strength of alkali-activated metakaolin based mortars.
Ding, Yining   +3 more
core   +1 more source

Metakaolin based geopolymer concrete with recycled geopolymer concrete dust

open access: yes, 2022
Mechanical analyzes were carried out on the recycled concrete samples obtained by preparing different mixtures of geopolymer powder, metakaolin, aggregates and alkali activator as sodium silicate (Na2SO3) and sodium hydroxide (NaOH) solution, which were formed by grinding the geopolymer concrete samples prepared with certain temperature and low curing ...
Alcan , Haluk Görkem   +7 more
openaire   +1 more source

Temperature for geopolymerization of fly ash. Mechanical behaviour [PDF]

open access: yes, 2015
Alkali activation of fly ash (FA) is a chemical process which allows the transformation of the amorphous structure which makes up most of its particles, in compact cementitious skeletons geopolymers are called solid materials usually consist of a ...
Almaral Sánchez, Jorge Luis   +4 more
core   +1 more source

Foam geopolymers: state of the art and preliminary experimental results [PDF]

open access: yes, 2014
Buildings are responsible for more than 40% of the energy consumption and greenhouse gas emissions. Thus increasing building energy efficiency is the most cost effective way to reduce emissions.
Abdollahnejad, Zahra   +2 more
core   +1 more source

Raman spectroscopy of cements: Problems and possibilities

open access: yes, 2011
Until recently there has been a common held misconception that Raman spectroscopy of cements is not possible, or at least so inconvenient as to make it impracticable.
Black, L
core  

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